Hi there, I was hoping you could help me.
I am developing a product with the Particle Electron for about a year now. And I’ve run into a persistent problem.
The goal is to power a 12V linear actuator with the Electron using a motor controller IC (H-bridge from Infineon rated 45V and 5A). This works like a charm after some prototyping.
To provide the 12V at a max of 5A the setup uses a Mean Well MDR-60 power supply. This power supply has an LED that indicates that DC power is ok and is switched with a relay with a rating of 30V/1A resistive.
Here comes the tricky part, during startup of the electron the relay is triggered and the power supply goes into safety mode. This does not happen if the power supply is plugged in after the electron boots on the battery. This makes me think that something is happening in the boot sequence of the Electron, either by shorting something (highly unlikely I think because things should be permanently damaged, which is not the case) or by some effect the antenna is creating during connecting with the server. Is there a third option for the relay to trigger and is this something that has happened before (although I couldn’t find a similar post on the forum).
My problem is that the Electrons can’t reboot automatically after a power cut off or full reset because the power supply just stops working. I have to unplug the power supply, boot the Electron on the battery and reconnect the power supply.
Things that I have excluded:
- PCB or anything on it
- A Faulty Electron (used multiple can recreate the error every time)
- Insufficient power supply
- Faulty antenna
- Faulty power supply (used multiple units)
- Only happens with cold boot during green light (at around 5 sec)
- Does not happen during data transmission (publish)