Basic Components

Here is a list of my favorite general use electrical components.

LED

Color	Source
5 mm Red, Yellow, Green, Blue diffused	https://www.sparkfun.com/products/12062
5 mm Red, Yellow, Green, Cyan, White diffused	https://www.adafruit.com/product/4203
5 mm Green diffused	https://www.adafruit.com/product/298
5 mm Purple, Blue, Green, Yellow, Red	https://www.sparkfun.com/products/12903
5 mm UV/UVA 'blacklight'	https://www.adafruit.com/product/1793
5 mm RGB Diffused	https://www.adafruit.com/product/159
3 mm Red, Yellow, Green, Blue, White diffused	https://www.adafruit.com/product/4202
3 mm Green 40 mcd	MFG #3GT Mouser #749-3GT
3 mm Red Diffused	https://www.adafruit.com/product/777
3 mm Yellow diffused 250 mcd	Mfg #SSL-LX3054SYD Mouser #696-SSL-LX3054SYD
3 mm Orange clear 500 mcd	Mfg #SLI-343DC3F Mouser #755-SLI-343DC3F
3 mm Blue Diffused	https://www.adafruit.com/product/780
3 mm White Diffused	https://www.adafruit.com/product/778

**LED Accessories**
Item	Source
5 mm LED holder	https://www.adafruit.com/product/2174 https://www.sparkfun.com/products/11840 https://www.sparkfun.com/products/11147

The longer lead goes to positive, the flat spot points toward the cathode (negative). The current goes from the anode (positive) to the cathode (negative).

Tutorial Links

Adafruit

Sparkfun

Power Supplies

Isolated power supplies electrically isolate the input from the output, providing the benefits of galvanic isolation, safety compliance, elimination of ground loops, and a floating output.

Regulated power supplies maintain the output at a near constant level, regardless of power input and load fluctuations. Load regulation is the ability of a power supply to maintain a constant output (voltage or current) with varying current draw loads. Line regulation is the ability of a power supply to maintain a constant output (voltage or current) with varying input voltage. The transient response relates to how quickly the power supply can react to variations in load and voltage input.

DC/DC Converters

A buck converter produces a voltage output that is less than its input.

A boost converter increases the input DC voltage to a higher DC output.

A flyback converter is one of the simplest DC-DC converter topologies to include electrical isolation. Although limited to low power (100 W), the transformer provides galvanic isolation. (they may also be used for AC/DC conversion).

A Forward DC/DC Converter can supply output voltage either higher or lower than the input voltage. They utilize an isolation transformer, are good up to 200 W, and have high energy efficiency.

A Half-Bridge DC/DC Converter can supply output voltage either higher or lower than the input voltage. They utilize an isolation transformer, provide power up to 500 W, and are inexpensive.

DC Voltage Regulators

If a DC-DC converter has a regulation rating of 1%, then the output voltage will not deviate more than 1% from the nominal value over the specified input voltage range and output current range.

The MPM3610 will convert 4.5 to 21 VDC down to 3.3V at 1.2 A continuous. Pin compatible with LM1117-3.3V TO-220. Excellent load and line regulation. 90 to 95% efficiency. ENable pin (pull low to shut down completely).

The LD1117 will convert 4.3 to 15 VDC to a clean 3.3 VDC with 1% regulation. The constant quiescent current draw is 5 mA. Maximum current supply is 800 mA if properly heat sinked. Use at least a 10 uF electrolytic capacitor on both the input and output for stability.

The L4931 will convert 5.4 to 20 VDC down to 5.0 VDC with 2% regulation. The constant 'quiescent' current draw is low (1 mA min, 5 mA @ 250 mA draw). Good for up to 300 mA with a proper heat sink. Use 10 uF (min 2.2 uF) electrolytic capacitors across both the input and output for stability.

The LM7805 series linear voltage regulators in the T0-220 package will convert 7 to 35 VDC down to 5.0 VDC () with 2% regulation. Current capability is typically 1.5A (for TO-220 package). There is a constant 'quiescent' current draw of 6 mA. Capacitors are not required for stability, but use at least 10 uF electrolytic capacitors across both the input and output.

The TSR 1-2433 is a step-down switching regulator that will output 3.3 VDC with loads up to 1000 mA with high efficiency (91%) and better than 2% accuracy. Add 10 uF capacitance on the input for additional stability. Low standby current of 2 mA. Voltage input of 4.75 to 36 VDC (9 VDC nominal). $6/ea. Other models available that output 5 VDC, 9 VDC, 12 VDC, etc. with similar performance.

For powering a Feather from a non-USB source, the input requirements are 4.5 to 5.5 VDC and at least 500 mA (1 A recommended). The TSR 1-2450E will accept a nominal input of 24 VDC (7 - 36 VDC) and output 1000 mA @ 5 VDC with 92% efficiency. Pinout is same as 78xx linear regulator (but larger footprint), and no capacitors required. For nominal 12 VDC power input (6.5 to 36 VDC), then the TSR 1-2450 provides 1000 mA @ 5 VDC with 94% efficiency, 2 mA standby current, and +/-2% output accuracy.

For powering a Arduino Uno or Mega from a non-USB source, the input recommendations for the Vin connection are 7 to 12 VDC and ??? mA (1 A recommended). The TSRN 1-2490 will accept 10.5 to 36 VDC and output 9 VDC with 95% efficiency. TSR 1-2490 will take a nominal voltage of 24 VDC (15 to 36 VDC) and output 9 VDC @ 1000 mA for the Arduino Vin pin.

Heat sink calculator

Isolated DC/DC Converters

The IEB01 will convert 4.5 to 5.5 (5.0 nominal) VDC to 3.3 V @ 303 mA with 74% efficiency, +/- 1.2% line regulation, +/- 1.5% load regulation, continuous short circuit protection with recovery, and 1.5 kV isolution. This is an isolated DC/DC converter.

The TEA 1-0505 converts 4.5 to 5.5 (5.0 nominal) VDC to 5.0 VDC @ 200 mA with 1.5 kV of voltage isolation.

Precision Voltage Reference

Precision LM4040 Voltage Reference Breakout 2.048V and 4.096V is ideal for an analog input reference. 0.1% accuracy. Power input is 5 to 12 VDC (3 V if only 2.048 V reference is needed). Not a regulator.

5 V voltage reference LM4040AIZ-5.0/NOPB

10 V voltage reference LM4040AIZ-10.0/NOPB

AC/DC Converters

Efficiency is key characteristic when selecting an AC to DC power supply. A switched-mode configuration increases efficiency.

Mean Well IRM-02 AC/DC Power Modules are well suited to mounting on a breadboard. They accept 85 to 305 VAC input and output 3.3 (600 mA), 5.0 (400 mA), 9.0 (220 mA), 12 (167 mA), 15 (133 mA) or 24 (83 mA) VDC regulated to within 2.5% of the nominal value. The no-load power consumption is below 0.075W, and efficiency is up to 77%.

Mean Well IRM-03 AC/DC Power Modules are well suited to mounting on a breadboard. They accept 85 to 305 VAC input and output 3.3 (900 mA), 5.0 (600 mA), 9.0 (330 mA), 12 (250 mA), 15 (200 mA) or 24 (83 mA) VDC regulated to within 2.5% of the nominal value. The no-load power consumption is below 0.075W, and efficiency is up to 77%.

Mean Well IRM-15-12 PCB mounted power supply 85 to 260 VAC power input to 12 VDC 1.3 A (15 W) output is well suited to power an Arduino Uno via the Vin pin. +/- 0.3% line regulation and +/- 0.5% load regulation.

CU Inc. 490-PSK-20D-24 PCB mounted power supply 85 to 305 VAC (58 W max) input, 24 VDC @ 0.83 A (20 W) output. Output power regulated to +/- 0.5% line and +/- 1.0% load.

AC Panel Mount Power Connector

703W-00/04 (mouser P/N 562-703W-00/04) panel mount AC power entry receptacle. 250 VAC 15 A rating. IEC-320 C-14 connector. Use with power cord 'AC-C13 NA' below.

AC-C13 NA AC power cord for mating to '703W-00/04' receptacle. Mouser P/N 490-AC-C13NA 1.8 m long 18 AWG, 10 A, 125 V, unshielded with IEC-320-C13 receptacle and IEC-320-C14 plug.

Wall Mount AC Adapter

120 VAC in, 24 VDC out @ 24 W / 1.0 A wall mount power supply with 2.1 mm barrel plug. Triad Magnetics WSU240-1000. Mouser 553-WSU240-1000

100 – 240 VAC in, 5 VDC @ 5A out, wall power adapter with 2.1 mm barrel plug. Polou PN 1462. A 3 A (PN1461) and a 1 A (PN 1469) version is also available.

Panel mount 2.1 mm barrel jack. Up to 8mm thick (0.315" or 5/16") panel thickness. Adafruit #610 Mouser 485-610

100 VAC to 240 VAC in, 5 VDC 550 mA (2.75 W) out, USB A connector, cordless, plugs directly into VAC outlet. Mouser PN552-AQ03A-050A-R

AC/AC

AC/AC power supplies are transformers that can step-up or step-down an AC voltage. A single-phase transformer has two coils, one primary and the one secondary. Three-phase transformers contain six coils, one pair for each phase. Transformers are selected by the Power Rating, Maximum Primary Voltage, Maximum Secondary Voltage, and the Direct Current Resistance. The Direct Current Resistance is the measured resistance of the transformer’s windings when a test DC current is applied.

DC/AC

A circuit that converts DC to AC power is called an inverter.

Power Solve power supplies

Diodes

The silver band on a diode points to the cathode side. A diode will allow current to flow from it's anode to cathode, but not in the opposite direction. Schottky diodes are used when the circuit switching is faster than 10 nanoseconds (they also have a very low forward voltage). Zener diodes (1N5818) are unusual in that they conduct reverse current at a particular reverse voltage threshold.

Chanzon 34 Values 0.5W Zener Diode Assorted Kit

When you have a high energy DC switching load such as a solenoid, put a 1N4001 or 1N4004 snubber / flyback diode as close as possible across the connection to that load.

1N4001 – 1N4007 series diodes are used in reverse polarity circuit protection. Schotty diodes are good for low voltage rectifier applications. Zener dioes are typically used to maintain a constant voltage by providing them with a constant current (via a series resistor).

Capacitors

Electrolytic capacitors tend have the NEGATIVE pin marked, but Tantalum caps have the POSITIVE pin marked.

uF/MFD	nF	pF / MMFD	Electrolytic
0.000001	0.001	1.0
0.00001	0.01	10.0
0.0001	0.1	100.0
0.001	1.0	1000.0
0.01	10.0	10000.0
0.1	100.0	100000.0
1.0	1000.0	1000000.0
10.0	10000.0	10000000.0
100.0	100000.0	100000000.0	Mouser P/N 485-2193
1000.0	1000000.0	1000000000.0

Electrolytic capacitors are good to 20 kHz, then the effective capacitance drops to almost zero. After 20 kHz, try a X5% ceramic.

Tutorial Links

Resistors

Most standard through-hole resistors are carbon-film or metal-film composition. Thick film surface mount resistors are less expensive and less precise than thin film.

Variable resistors are also called rheostats. A potentiometer have two internal resistors in series, creating an adjustable voltage divider. Normally a linear single turn motion is preferred. For a panel mount potentiometer, choose one with a T18 (18 spline) 5.5 mm shaft. (rotary encoders typically have a D shaft).

The resistor power rating is the maximum power a resistor should be asked to carry. Resistors more than 1 W are power resistors. P = i^2 * R = (V^2)/2


	Item	Source
	10k PCB thru hole 0.1" spacing	Mfg # Adafruit #356
	10k Panel Mount Linear Potentiometer	Mfg # AF #562
	Panel Mount 10K Log Potentiometer Breadboard Friendly	Mfg # Adafruit #3391
	Knob - Soft Touch T18	Mfg # Adafruit #2047
	Knob - 1" Dia Metal	Mfg # Adafruit #2056

Tutorial Links

Transistors for I/O Control


Item	Source
N-Channel MOSFET IRLB8721 44 A @ 30 VDC Ultra-Low Gate Impedance	Mfg # IRLB8721PBF Mouser # 942-IRLB8721PBF
N-Channel MOSFET FQP30N06L 30 A @ 60 VDC Low Gate Impedance	Mfg # FQP30N06L Mouser # 512-FQP30N06L
P-Channel MOSFET +/-20 V gate to source Low gate voltage of -2.4V TO-92 package For reverse polarity protection	TP2535N3-G Mouser 689-TP2535N3-G
P-Channel MOSFET 20 A @ 60 V Low gate impedance 17 A @ 60 V TO-220 pkg For +V switching	Adafruit P/N 1794 Mouser # 512-FQP27P06 Try similar but stocked: SPP18P06P H
PN2222 NPN 600 mA Use with 1.0k to 3.3kΩ resistor	Mfg #PN2222ATFR Mouser #512-PN2222ATFR Adafruit P/N 756

In general, TO-220 sized parts can dissipate about 1.5-2W without a heatsink.

A bipolar junction transistor (BJT) is current controlled. The base resistor needs to be carefully calculated for the BJT. A metal-oxide semiconductor field-effect transistor (MOSFET) is voltage controlled, and they have a high input impedence. A TIP120 or NPN Darlington transistor is a current controlled device that is used for amplification and power switching.

To use a N-Channel MOSFET as a switch, connect the source to ground, and apply a voltage to the gate to turn it on, othwise the gate should connect to ground through a pull-down resistor. The signal (voltage) to the gate should have the current limited by using a resistor in series to protect the microcontroller digital output. A pull-down resistor (to ground) should also be connected to insure the gate to the MOSFET will not float. The combination of the resistor in series with the signal (R1), and the pull-down resistor R2 is a voltage divider. The final voltage reaching the MOSFET gate through the voltage divider should be at least larger than the maximum Gate Threshold Voltage Vgs(th), and less than the abaolute maximum rating of the Gate-to-Source Voltage (typically +/- 20 V). Choose a R1 that produces a voltage larger than the maximum Gate Threshold Voltage Vgs(th), and requires the least amount of signal current (from microcontroller).

A P-Channel MOSFET has the source connected to the power rail (Vcc), and the gate is pulled to ground to allow current to flow, otherwise it is connected to Vcc through a pull-up resistor.

The IRLB8721 Power N-Channel MOSFET in a TO-220 package should be your first choice for switched ground digital output control. It has a very ultra-low gate impedance, minimizing the load on the microcontroller providing the signal, and the voltage loss is less than a TIP120. And it can switch loads up to a continuous current of 44 A at 30 VDC in high temperature environments. Use it with a TO-220 heat sink when currents exceed 15 A. The maximum continuous current and voltage are affected by the load, so carefully consult the datasheet and evaluate the limit relative to your application. Do not use in parallel because it is difficult to turn on multiple MOSFETs in a capacitive-resistive circuits. When you need higher voltage capability to 60 V and currents are under 30 A, choose a FQP30N06L.

A TIP120 is a NPN Darlington Power Transistor with a current gain of 1000. The gate is current controlled and therfore the resistor in series needs to be carefully selected relative to the load. Choose an N-Channel over the TIP120 for power switching applications. The high current gain is good for amplification applications.

The PN2222 NPN bipolar junction transistor (BJT) works well between a microcontroller digital output and another transistor or relay for the switching of the ground to another component. The signal applied to the base pin needs to be generally greater than 0.6 V and the current should be limited by a resistor in series with a value that generates a current between 1.0 to 10 mA, typically 1.0k to 3.3k ohms for 3.3 and 5.0 V signals (check what current your microcontroller digital output can source safely). For application where you are controlling the gate of another transistor (such as a P-Channel MOSFET), then it is often easier to use a FQP30N06L or BS170-D75Z because these have gates that are voltage controlled and don't need a unique resistor in series with the gate for every application.

Two MOSFETs suitable for 3.3 volt microcontrollers: The IRFZ44N is an N-channel device rated at 55V and RDS(on) resistance of 0.032 0hms max (mouser P/N 942-IRFZ44NPBF). The IRF4905 is a P-Channel device rated at 55 V and an RDS (on) of 0.02 ohms (mouser P/N 942-IRF4905PBF).

Tutorial Links

Transistors by Sparkfun

Introduction to PN2222

P-Channel (baldengineer.com)

Relays


Item	Source
30 A @ 277 VAC SPST-NO Relay 12VDC 140Ω coil consumes 86 mA Panel flange mount	Mfg #T9AP1D52-12 Mouser #655-T9AP1D52-12
20 A @ 277 VAC SPDT-NO,NC Relay 12VDC 140Ω coil consumes 86 mA Panel flange mount	Mfg #T9AP5D52-12 Mouser #655-T9AP5D52-12
30 A @ 240 VAC SPDT NO Coil 200 mA @ 5 VDC	Mfg # Mouser #655-T9AS1D12-5 Obsolete
10 A @ 250 VAC / 150 VDC Coil: 38 mA @ 12 VDC	Mfg # LZ-12V-K Mouser #817-LZ-12V-K Obsolete

Tutorial Links

Switches


	Item	Source
	Latching Pushbutton + Green LED ∅16 mm, 3A @ 250 VDC, NO & NC contacts 3 to 24 VDC LED. Also available in blue, red, and white. These conection wires make hookup easy. This connector mates with the connector on the end of the connection wire and mounts into a PCB.	green AF #482 green mouser #485-482 blue AF P/N #915 red AF P/N #916 white AF P/N #917.
	Momentary Pushbutton ∅16 mm, 3A @ 250 VDC, NO & NC contacts 3 to 24 VDC LED. Available in blue, red, white, and green. These conection wires make hookup easy. This connector mates with the connector on the end of the connection wire and mounts into a PCB.	AF #2093 blue AF P/N #481 red AF P/N #559 white AF P/N #558. green AF P/N #560.
	Momentary pushbutton OFF-(ON) + LED 30 VDC @ 100 mA Only ~22 mm clearance required under panel. ⌀ 10 mm outside face ⌀ 8.2 mm panel hole in 3.9 mm thk 3D printed PLA. hookup	Blue LED: Mouser PN 612-LP1OA1AB (Looks exactly like the more expensive Mouser 107-PS001-N11NAWUBXX) Green LED: Mouser 612-LP1OA1AG Red LED: Mouser 612-LP1OA1AR White LED: Mouser 612-LP1OA1AW Yellow LED: Mouser 612-LP1OA1AY
		Mfg #
	Small 10x15 Rocker SPST Panel opening 9x14 mm Blades fit quick connect wire Adafruit P/N 3835	Available in bulk from many sources
	∅ 21 mm 20A @ 12 VDC SPST green/yellow/red/blue LED Panel opening: 20.7 mm DIA x 5 mm thk Clearance reqd below panel: ~35 mm $0.58/ea wiring	Mfg # 90013L Nilight 90013L
	∅20 mm, 10A @ 125 VAC	Mfg # SF COM-11138
	∅20.2 mm rocker + blue LED 16 A @ 12 V LED 5 to 12 V	Mfg # SF COM-11155
	sm footprint rocker SW 18.6 x 13.0 mm 15A @ 125VAC	Mfg # SF COM-08837
	sm SPST toggle SW 4A @ 125V	Mfg # SF COM-09276
	SPDT Slide Switch 0.1" pin spacing 0.2 A @ 30 VDC	Mfg # Adafruit P/N 805
	Slide SW 300 mA @ 125 VAC 3.7mm (0.14") pin spacing	Mfg # SF PRT-14330 11 x 6 mm panel opening
	DIP SW 8 position 0.1" spacing for PCB	Mfg # SF COM-08034
	∅22 mm Keylock SW 4A @ 125 VAC	Mfg # SF PRT-14947
	6x6 mm pushbutton 6.5 mm x 5.0 pitch (5.0 pitch switched)	Mfg #B3F-1020 (OMRON) AF #367
	Mini breadboard SPDT 200 mA @ 30 V 0.1" pitch	Mfg #P040040 SF COM-00102 Mouser #474-COM-00102 AF #805

Tactile Button Membranes

Many LCD and other displays have buttons installed near the display. Add a membrane over them with your 3D printed bezel to create a clean and professional project enclosure. Search for tactile button caps.

hackaday.com - Brian Benchoff

Adafruit 4x4 grid of silicone buttons

Tactile Membrane Dome Switches

Tutorial Links

Screw Terminals

PCB Mounted Thru Hole

	Item	Source
	2-Pin 5 mm (0.2") pitch 22 to 12 AWG 300 V @ 15 A	Mfg #TB002-500-02BE mouser 490-TB002-500-02BE
	3-Pin 5 mm (0.2") pitch 22 to 12 AWG 300 V @ 15 A	Mfg #TB002-500-03BE mouser 490-TB002-500-03BE
	4-Pin 5 mm (0.2") pitch 22 to 12 AWG 300 V @ 15 A	Mfg #TB002-500-04BE mouser 490-TB002-500-04BE
	2-Pin 2.54 mm (0.1") pitch 30 to 18 AWG 150V @ 6 A 3-Pin 2.54 mm (0.1") pitch 4-Pin 2.54 mm (0.1") pitch	Mfg #VN02A1500000G mouser 649-VN02A15000J0G Mfg #VN03A1500000G mouser 649-VN03A15000J0G Mfg #VN04A1500000G mouser 649-VN04A15000J0G

Surface Mount Barrier Terminal Blocks

Single row barrier terminal block with quick connect (blade) on the inside of the enclosure, and screw terminal on the top for simple external connections.

Purchased "A2091*" to see if product is better than what is in the table below. (the items in the table have a long QC terminal; "19") Available in 4, 8, and 10 pole only. mouser search

	Item	Source
	## position 30 A / 300 V 22 - 12 AWG A2 Series	Mfg #A2193 Mouser search [A2][19 or 09] [3] [## poles][][] (Max 10 poles due to my enclosure width of 4.25") datasheet
	2 position 30 A / 300 V 22 - 12 AWG A2 Series	Mfg #A21930209MP Mouser #504-A21930209MP
	3 position 30 A / 300 V 22 - 12 AWG A2 Series	Mfg #A219303MP Mouser #504-A219303MP
	6 position 30 A / 300 V 22 - 12 AWG A2 Series	Mfg #A219306MP Mouser #504-A219306MP
	10 position 30 A / 300 V 22 - 12 AWG A2 Series	Mfg #A21931004 Mouser #504-A21931004

Miscellaneous Panel Mount Components

	Item	Source
	2.1mm DC Barrel Jack Drill 31/64 inch	Mfg # mouser 485-610 Adafruit PN 610

Connectors

USB

	Item	Source
	Poyiccot 90 Degree Right Angle Micro USB Male to Panel Mount Micro USB Female (For Feather/Featherwing mounted in an enclosure)	Poyiccot B08NPCQ3T4
	USB 3.1 Type A female/receptacle breakout 10 pins (including shield)	Mfg #BRK-USB-A-3.1 DigiKey 3457-BRK-USB-A-3.1-ND
	USB 3.1 Type A male/plug breakout 10 pins (including shield)	Mfg # BRK-USB-AP-3.1 Digi-Key 3457-BRK-USB-AP-3.1-ND

IDC Cables & Connectors

IDC pins are 0.1" x 0.1" spacing. Molex 70246 series headers. Rated 250 VDC 2.5 A

	2x3 IDC	Source
	2x3 Breakout Helper	AF #2105 Digi-Key
	2x3 6" ribbon cable	Mfg # AF #371 Digi-Key

	2x5 IDC 0.1"x0.1" pin spacing	Source
	2x5 PCB thru-hole shroud	Mfg # 15-47-7610 Mouser 538-15-47-7610 Digi-Key WM7196-ND
	2x5 Breakout Helper	AF #2102 Digi-Key
	2x5 6" IDC cable	Mouser #485-370 AF #370 Digi-Key SF CAB-15364
	~~10-pin IDC to 0.1" female socket connectors~~ DOES NOT FIT 2x5 PCB thru-hole shroud	AF #1199 Digi-Key

	2x8 IDC	Source
	2x8 PCB thru-hole shroud	Mfg # 702461601 Mouser #548-70246-1601
	2x8 ribbon cable 12" long	Mouser #485-4170 AF #4170 Digi-Key
	2x8 Breakout Helper	Mouser #485-2104 AF #2104 Digi-Key

	2x13 IDC	Source
	2x13 PCB thru-hole shroud	Mfg # 70246-2601 Mouser #538-70246-2601 DigiKey WM9222-ND
	2x13 pin Breakout Helper	AF #2101 Digi-Key
	2x13 PCB thru-hole shroud	AF #1171
	2x13 ribbon cable	Mouser #485-862 AF #862 Digi-Key
	2x13 stacking header	AF #1112 Digi-Key

	2x20 IDC 0.1" pin spacing	Source
	2x20 PCB thru-hole shroud	Mfg # 702464001 Mouser #538-70246-4001
	2x20 pin 6" ribbon cable	Mouser #485-1988 AF #1988 Digi-Key SF CAB-13028
	2x20 Breakout Helper	AF #2270 Digi-Key
	2x20 male header	AF #2822
	2x20 pin Box Header	AF #1993 SF PRT-13054
	2x20 Stacking Header	Mfg # AF #2223 Digi-Key

	Other IDC	Source
	2x23 Male Headers (cut to size)	Mfg # AF #2076 TBD

SWD / JTAG Cables & Connectors

Very compact. 0.05" (1.27 mm) pin spacing.

	2x5 SWD 0.05"x0.05" spacing	Source
	2x5 pin SWD cable 30 AWG	Mfg # SP-06 1.27 10p Mouser 474-CAB-15364 SF CAB-15364
	2x5 pin male header 1.0 A	Mfg # 00140 Mouser 474-PRT-15362 SF PRT-15362

JST

Qwiic / Stemma QT

STEMA connectors come in three types: STEMMA 4 Pin JST PH for I2C, STEMMA 3 Pin JST PH for PWN/Analog/Digital, and STEMP QT 4 Pin JIST SH for I2C.

JST SH connectors are STEMMA QT compatible and Grove/Gravity/STEMMA/Qwiic controller compatible. Pin 1 gnd (black); pin 2 3.3VDC (red); pin 3 I2C SDA data (blue); pin 4 I2C SCL clock (yellow). 1 mm connector & mounting pitch. 1.0 A, 50V, 28 AWG

	JST SH	Source
	50 mm long STEMMA QT / Qwiic JST SH 4-Pin Cable	Adafruit PN 4399 Mouser PN 485-4399
	100 mm long STEMMA QT / Qwiic JST SH 4-Pin Cable	Adafruit PN 4210 Mouser PN 485-4210
	200 mm long STEMMA QT / Qwiic JST SH 4-Pin Cable	Adafruit PN 4401 Mouser PN 485-4401
	400 mm long STEMMA QT / Qwiic JST SH 4-Pin Cable	Adafruit PN 5385

JST PH are compatible with 4 Pin Seed Grove connectors, STEMMA 4 Pin JST PH for I2C, and STEMMA 3 Pin JST PH for PWN/Analog/Digital. Two pin is frequently used for LiIon/LiPoly batteries. 2 mm pitch connector. 2 A, 100 V, 24 AWG (JST PH is larger than SH). JST product website image

	JST PH	Source
	2-Pin right angle through hole	Mouser 474-PRT-09749 Sparkfun PRT-09749
	2-Pin Male + Female battery extension cable 500 mm	Mouser #485-1131 Adafruit #1131
	JST PH 2-Pin Female Lipoly batt/charge	Mouser #485-261 Adafruit #261
	3-Pin Male PCB Mount	AF #4389
	4-Pin Male PCB Mount	AF #4390
	4-Pin Male PCB mount & 4-Pin Female 26 AWG 150 mm Cable	WOWOONE on Amazon
	4-Pin Male Header Cable 200 mm long cable	AF #3955
	4-Pin Socket Cable 200 mm long cable	AF #4045
	3/4/5/6-Pin Cable Pairs (general use connectivity)	AF #5087

JST SM 3A, 250 V max. 22 to 28 AWG 2.5 mm pitch datasheet JST product

	JST SM	Source
	2 Pin JST SM	Adafruit #2880 TBD
	3 Pin JST SM	Adafruit #1663 TBD

Quick Connects

	Size	Source
	0.11" [1] 22 AWG	AF #1152 Mouser P/N 485-1152
	0.187" [1]	AF #3835 Mouser P/N 485-3835
	0.25" [1]	AF #3838 Mouser P/N 485-3838

[1] opposite end of wire is terminated with JST XH 2.5 mm / 0.1" 2-pin connector (fits breadboard spacing). The JST XM connector P/N B2B-XH-A(LF)(SN) is available from Digi-Key I have confirmed that the alternative part Mfg P/N ‎B2B-XH-A-M(LF)(SN)‎ Digi-Key P/N 455-2879-ND‎ fits the connector perfectly. Mfg P/N ‎B2B-XH-A-M(LF)(SN)‎ has a (PCB) through hole spacing of 2.45 mm and a footprint of 2.5 x 7.4 mm.

Power Connectors


	Item	Source
	2 to 12 Pin female panel mount (1 hole with flange and nut) and matching male plug AC 500V/30A waterproof IP68 SP21 Series	Mfg # SP2112/S{# contacts}-1 + SP2110/P{# contacts}-1 WEIPU on AliExpress SZJELEN on Amazon
	2 to 12 Pin female panel mount (4x flange mounting screws) and matching male plug AC 500V/30A waterproof IP67 SP21 Series	Mfg # SP2114/S{# contacts}-1 panel mount + SP2110/P{# contacts}-1 plug SZJELEN SZJELEN on Amazon
	2 to 12 Pin female plug and matching male plug (docking connector) AC 500V/30A waterproof IP67 SP21 Series	Mfg # SP2110/P{# contacts}-1 + SP2110/S{# contacts}-1 plugs ( SZELEN on AliExpress SZJELEN on Amazon

SD Card Extension Cables

These have mounting holes so they can be mounted to an enclosure, and then the other end can be plugged into the micro SD card within the enclosure.

Sara-u SD Card Female to TF Micro SD Male P/N sara-u 02

TF to MicroSD Card Reader Extension Cable

Links

qwiic (I2C prototyping)

STEMMA JST PH connectors for sensor to microcontroller connections.

Printed Circuit Board Components


	Item	Source
	2-Pin 5 mm pitch Footprint 5 PCB 0.1" spaced holes 2 hole contact 300V @ 8A 26 to 14 AWG	Mouser 474-PRT-08432 SF PRT-08432
	2.1mm DC barrel jack	AF #373
	JST SH 4-pin Vertical Connector (10-pack) - Qwiic Compatible	AF #4328
	JST PH 4-Pin to Female Socket Cable - I2C STEMMA Cable - 200mm	AF #3950

Enclosures

Battery & Solar

	Item	Source
	Li 4400 mAh 3.7 V Limit discharge < 1 A/hr	Mfg # Mouser #485-354 Adafruit #354

Wire

	Item	Source
	Hook-up Wire solid core 22 AWG 10x spools of various colors 25 ft per spool	Mfg # Adafruit PN 3174
	18 AWG Hookup Wire Black insulation Stranded tinned copper	Mfg # 6734-0 Mouser 565-6734-0
	18 AWG Hookup Wire Red insulation Stranded tinned copper	Mfg #6734-2 Mouser 565-6734-2
	18 AWG Hookup Wire White insulation Stranded tinned copper	Mfg # 55PC0211-18-9 Mouser 650-55PC0211-18-9
	18 AWG test lead wire 12 A Six colors Flexible w/ silicone insulation Each of piece 68 inches / 1.7 m	Mfg #CT4403 Mouser 510-CT4403

Fuses

	Item	Source
	Mini (ATC/ATO) Inline Fuse Holder 12 AWG; 30 A	Mfg # Mouser 576-0FHM0002ZXJ
	ATC/ATO Inline Fuse Holder	Mfg # TBD

Arduino / Feather Microcontroller Related Parts

	Item	Source
	36-pin 0.1" Female header (normal height)	Adafruit PN 598 Mouser PN 485-598
	36-pin 0.1" Short Female Header	Adafruit PN 3008 Mouser PN 485-3008

Arduino Microcontroller Specific Parts

	Item	Source
	Panel mount USB B male to B Female cable (Arduino MCU)	Adafruit #907
	Arduino stacking headers	Adafruit PN 85 Mouser PN 485-85

Feather Microcontroller Specific Parts

	Item	Source
	Wall mount VAC to Micro USB PS 90 to 264 VAC input 5 VDC @ 1.0 A output	Mouser PN T6641ST
	12 to 24 VDC to Micro USB PS	YIPIN HEXHA
	Panel mount USB micro female to micro USB male right angle cable (most Feather products)	Poyiccot
	Panel mount USB micro female to micro USB male cable (most Feather products) May need right angle adapter	Adafruit #3258
	Stacking Headers	Adafruit PN 2830 Mouser P/N 485-2830
	Female Stacking Header (displays) Low-Profile 5.2 A per pin 4.95 mm wide x (2.54mm * # positions)	12 Pin (2x12): Mfg PN SLW-112-01-T-D Mouser PN 200-SLW11201TD 16 Pin (2x16): Mfg PN SLW-116-01-T-D Mouser PN 200-SLW11601TD

Permanent Magnets

The four types of permanent magnets in order of strongest to weakest

Neodymium iron boron (NdFeB) [rare earth]
Samarium cobalt (SmCo) [rare earth]
Ceramic or ferrite
Alnico

Suppliers

K & Magnetics, Inc.

Solder

Rosin Core Lead Free Solder Wire Sn97 Cu0.7 Ag0.3 0.8 mm (0.031") DIA 100 g spool

Adafruit product ID 734 (expensive)

Helpful Links About These Components

El-Pro-Cus - basic components

SF how to read a schematic

Engineering Essentials by Sparkfun

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