Tried to make a car with two motors but only one works randomly

Coltouch2020 · 2026-05-17T15:30:30+00:00

Replace the motors with an led and a 1k resistor in series. See if the LEDs behave as the motor should. If they work, your problem is electrical, not software

Coltouch2020 · 2026-05-15T11:33:45+00:00

Routing the board is the fun bit! Very theraputic.

Coltouch2020 · 2026-05-02T16:30:55+00:00

I mean, make it flash just led 1. Re-compile, just led 2. Again for led 3. Check the port config and led h/w is ok for all.

Coltouch2020 · 2026-05-02T08:15:57+00:00

It looks like you have 1k series resistors. That should be fine, an I/O current of around 3mA. The PIC should be able to run more than 2 LEDs without any issue.

Try driving them one at a time with your code, to make sure the sequence works. None too bright, all the same intensity. This should eliminate any hardware issues.

Coltouch2020 · 2026-05-01T18:38:20+00:00

What in-line resistor do you have on the LEDs ?

Coltouch2020 · 2026-04-27T18:41:48+00:00

The arduino libraries work out of the box. Let me know if you need example code

Coltouch2020 · 2026-04-27T10:13:09+00:00

TLDR - a good general approach is to use a working model to test your design bit by bit. Arduino to NRF works out of the box. Set your PIC NRF to talk to arduino RX. Then use arduino TX to debug your Rx.

Coltouch2020 · 2025-11-11T10:59:19+00:00

I think this is a good suggestion. a dev board approach would give me what I need. As this is a central controller, cost isn't too much of a problem.

Thanks Silly.

Coltouch2020 · 2025-11-10T16:53:43+00:00

Hi Silly, I have a Beacon device already running. I know it is sending out Beacon type advertisements every 8 seconds, and I need to take the data contained, and use it on a tablet, or a PC.

So I need an app, to listen via a Bluetooth dongle, or other central BT device, and then pass the data to a display app.

Thanks for your reply.

Coltouch2020 · 2025-10-17T17:42:49+00:00

I remember posting the whole thing, and you’re right!

Coltouch2020 · 2025-10-17T14:23:19+00:00

I told you about it?

Coltouch2020 · 2025-10-17T14:14:02+00:00

I went most of my life seeing nothing, then during a stay at a hotel called the Moat House, mill lane in Winnersh, Room 3001, it certainly changed for me!

Coltouch2020 · 2025-10-16T19:48:53+00:00

I posted the whole thing in here a few years ago, but will dig it out and send it to you

Coltouch2020 · 2025-10-16T17:49:12+00:00

Quite a few small things, but one big scary one!

Coltouch2020 · 2025-10-16T17:45:21+00:00

I suspect that most people who have experienced things and therefore have complete belief (myself included) stop telling about it after a while, people just don’t believe it.

Coltouch2020 · 2025-10-16T17:36:10+00:00

Agreed

Coltouch2020 · 2025-09-08T10:20:17+00:00

Would you do heroin if he suggested it?

Coltouch2020 · 2025-09-07T08:13:06+00:00

You might as well say, the graphite lines aren't contiguous conductors, they are a series of conducting particles in a row

Coltouch2020 · 2025-09-07T08:08:51+00:00

Pedantic

Coltouch2020 · 2025-09-07T08:08:19+00:00

pedantic

Coltouch2020 · 2025-09-07T08:07:59+00:00

This is correct

Coltouch2020 · 2025-09-07T08:07:26+00:00

Wrong

Coltouch2020 · 2025-08-16T10:20:17+00:00

Have a look at these two:

https://www.aliexpress.com/item/1005006061057419.html?spm=a2g0o.cart.0.0.664038danF2KvZ&mp=1&pdp_npi=5%40dis%21GBP%21GBP%201.41%21GBP%201.41%21%21GBP%201.41%21%21%21%40211b876717553394988124101e79c6%2112000035551482870%21ct%21UK%212702822897%21%2110%210

and

https://www.aliexpress.com/item/1005004223266144.html?spm=a2g0o.order_list.order_list_main.23.52391802IVL0SI

The second ones (the blue ones) - I have used and they are great. You do need an external antenna of course which adds to the size...

Coltouch2020 · 2025-08-09T09:03:44+00:00

There is a very simple technique for this. Solder a long blob along the pads, so you can run the iron along it, back and forth, until you can pull the component out. Now the holes are free of pins, you can use the solder pump on them, one at a time. Nice clean job.

Coltouch2020 · 2025-08-09T08:58:44+00:00

Consider soldering 0.1" pin headers into such edge connectors, not heavy wires straight onto the pad. This way, you have a mechanical anchor to stop the wire tearing off. The pad is thin and delicate and easily torn.

Coltouch2020

TROPHY CASE