C. Thomas Morrison
Published © MIT

Particle Photon Relay Board

Photon controlled relay to turn whatever on & off. Also, avoid the hassle of a wall-wart power adapter. There are also a couple of inputs!

BeginnerWork in progress2 hours961
Particle Photon Relay Board

Things used in this project

Hardware components

IRM-03-5
×1
10K ⅙ watt 1% resistor
×1
Photon
Particle Photon
×1
SparkFun SPDT 5VDC Relay
×1
SparkFun Diode Rectifier 1A 50V
×1
SparkFun Resistor 1K ¼ watt
×2
SparkFun Fuse clip - 5mm
×1
SparkFun Fuse 5mm 250V 200mA
×1
LED (generic)
LED (generic)
×1
SparkFun Transistor NPN generic
×1
SparkFun Screw Terminal 5mm (2-Pin)
×1
SparkFun Screw Terminal 5mm (3-Pin)
×1
Female Header 12 position 0.10" pitch
×2
Seeed Custom PCB Board
×1

Story

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Schematics

Custom PhotonRelay Board

I didn't take time to clean up the schematic, but it really is pretty simple. Here are the Gerber files for the final product

Corrected PCB layout

The initial design had a mistake on the input. It was tied to 5VDC and not 3.3VDC. This would have caused problems with the input being over voltage. I redesigned the board making it a bit smaller, fixing the above mistake and adding another input. Both of the inputs can be digital or analog and have 10K resistors to ground, so it's easy to attach something like a dry contact switch or a 10K NTC thermistor to measure temperatures and use that in the control scheme.

Credits

C. Thomas Morrison

C. Thomas Morrison

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