You are reading a single comment by @Jean-Philippe_Rey and its replies. Click here to read the full conversation.
  • Hi! Great - I'm glad you're liking it! I think you might be the first buyer!

    For anyone interested - I'm on holiday next week but when I get back I'll be adding a 'plus' kit to the shop that has a few more connectors, a screwdriver and battery (it's still an identical board to this), but at that point I'll start trying to advertise Jolt.js a bit more!

    Is there a way to use them as dry-contact outputs (as a Normally Open Relay would do) ?

    I'm not entirely sure I get what you mean, but I don't think so, no.

    The motor driver IC is https://www.ti.com/lit/ds/symlink/drv884­7.pdf

    The 8 outputs on the terminal block can be pulled up/down or left open (but not connected together like relay contacts). Even when they're open circuit, there are still clamp diodes to the power rails.

    There are 2x FET outputs on the Qwiic connectors which at least are only clamped to 0v, but I think that's unlikely to be what you need either and I wouldn't advise using them for anything too heavy duty.

    If you really want a truly isolated switch-style output, I think your best bet is just to attach a small relay to the terminal block, and then you can switch whatever you want (including mains).

    I looked for the schematic

    Ahh, sorry - just added to https://github.com/espruino/EspruinoBoar­d/tree/master/Jolt.js

  • Thank you for your quick answer, your explanations and the schematics!

    Looks like with FETs on Qwiic interface we can have a dry-contact output (even if it is not isolated from the circuit).

About