iSpindel Assembly

Published by Joey Joe Joe Jr on

iSpindel parts

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Why People Remove the Diode on the D1 Mini

If you don’t remove the diode from the D1 mini you could end up in trouble. When you plug in the D1 mini you are also sending 5 volts to the D1 mini’s VCC which is attached to the battery. That battery isn’t meant to handle 5 volts so this a bad thing and if left unchecked could start a fire. Powering the battery with 5 volts can only happen: 1) if the battery is present and 2) if the power switch for the iSpindel is at the on position, and 3) if the diode still exists on the D1. It looks like the solution is to remove the D1 mini’s diode and then the battery can’t get overloaded. The only ‘downside’ is that you’ll need a fully charged battery present before you flash the D1 mini’s firmware via USB cable. I sincerely recommend removing the D1 mini’s diode as a safety precaution. I will update my assembly instructions to include the removal of the D1 mini’s diode in the future.

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The diode on D1 mini v3 in the red square above. It is labeled “SL”. In some cases, the label may be different or the diode may be in a different spot depending on the versions of the board.

Joey Joe Joe Jr

I was born on a pirate ship off the coast of Peru where I was given a traditional Aztec upbringing, during which I excelled in the arts of sciences. At age seven my parents accidentally murdered each other in a freak fencing accident. Heartbroken I joined the tribe of Omaha, where I trained under the legendary Vin Diesel. At age eighteen, after a failed Fear Factor audition, I set out for a berry plantation roughly four kilometers south of Albuquerque. I currently reside at Ram Ranch which really rocks!


Per Ole Gabrielsen · March 25, 2020 at 3:36 AM

Love your PCB 😀 Just ordered 10 of them. I advise others to flash the D1 mini before the solder it all together. What do you think of that?

    Joey Joe Joe Jr · March 31, 2020 at 8:40 AM

    I’ve never done it that way but I don’t see why it wouldn’t work. Have you tried it from parts to the final assembly?

      Per Ole Gabrielsen · March 31, 2020 at 8:44 AM

      Yes, it work like a charm 👍

        Joey Joe Joe Jr · March 31, 2020 at 8:48 AM


Per Ole Gabrielsen · March 25, 2020 at 4:09 AM

PS! And if you remove that diode, it is not possible to flash before assembly the lot!

    Joey Joe Joe Jr · March 31, 2020 at 8:41 AM

    No, the D1 won’t be able to be powered from the USB if the diode is missing. You would have to find another way the D1 if the diode is missing.

Francois Lalonde · April 2, 2020 at 6:13 AM

Received my PCB yesterday! They look great… can’t wait for the parts to arrive and start the build.

    Joey Joe Joe Jr · April 2, 2020 at 10:10 AM


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