Relay control with PyPortal | adafruit | Page 1

crude whale Sep 21, 2022, 9:35 PM

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I am currently working on this guide https://learn.adafruit.com/ez-make-oven. I do not have a readily available relay module so I am trying to make my own. What is the logic voltage of the D3 and D4 connectors and would this circuit be applicable? I have checked the datasheet for both the transistor (ON SS9014) and the relay (RTD34005) and this circuit seems to pass a safe amount of current through both.

hushed sparrow Sep 21, 2022, 9:39 PM

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I believe they are 3.3V

crude whale Sep 21, 2022, 9:41 PM

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alright, cool

hushed sparrow Sep 21, 2022, 9:42 PM

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Yeah

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crude whale Sep 21, 2022, 9:46 PM

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I have some 1N4148 left over from a keyboard project, would this work for inductive kickback protection?

hushed sparrow Sep 21, 2022, 10:06 PM

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I think you want a schottky

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Also are you familiar with high voltage design? It can get dangerous

crude whale Sep 21, 2022, 10:14 PM

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hushed sparrow Also are you familiar with high voltage design? It can get dangerous

No, not yet

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if needed, I could pull out a pre-made relay module out of another thing I built

hushed sparrow Sep 21, 2022, 10:14 PM

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I personally would just buy a module.

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Functional Devices makes some high quality, CE and UL rated/listed devices for decent prices.

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Keep in mind that any fires started by devices that aren't rated/listed won't be covered by insurance.

crude whale Sep 21, 2022, 10:17 PM

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good point, fwiw I am better off using the IoT splitter listed in the guide

#Relay control with PyPortal