BLE NRF52832 disconnect when driving electromechanical relay

RE: BLE NRF52832 disconnect when driving electromechanical relay

ketil — Fri, 06 Apr 2018 08:02:05 GMT

Hi,

We can't see any immediate errors with your schematic. In our designs we have used MOSFETs instead of bipolar transistors but both should work fine.

You can attach an oscilloscope to VDD and see if there is a drop when you switch the relay on that causes a brownout.

Sparkfun has a guide on using relays that might be useful.

Please see the attached schematic for an example of how we used a DPDT relay to drive a DC motor.

Ketil

RE: BLE NRF52832 disconnect when driving electromechanical relay

Stephane Lejeune — Fri, 23 Mar 2018 13:23:02 GMT

Hello,

Maybe with this picture it is better.

regards

Stéphane

RE: BLE NRF52832 disconnect when driving electromechanical relay

ketil — Mon, 05 Mar 2018 10:19:07 GMT

Hi Stéphane,

It is not possible for us to read the letters on the schematic. Could you please re-upload with higher resolution? Also, could you upload your PCB layout?

Ketil