10528 réponses à ce sujet

[firened]

Just beware

[firened]

Hm weird. Then i don't know. The shielding should work if it's electromagnetic interference.
Yes broken ribbon cables can do that too but your's isn't old yet

[firened]

I'd probably check the internet for popular rc crawler brands, then search second-hand platforms for those specific brands.

Or perhaps ask around in your friend- and relative-circles. At least here in Switzerland i think many people might have old rc cars they no longer need.
Also remember that there's no rush. Electronics is often not about reaching an end goal at all, but more about the journey, learning, soldering, breaking things and making mistakes.

[firened]

Another option is to build the platform from scratch using wood, motors, wheels, find part at a scrapyard and the like. It's a lot more work and the end product might not be fast or anything but could be fun and cheap as well

[Mike118]

I spend too much time on them and don't produce enough of them. x)

I am working on "industrialisation" to make them easier to build and solving issues ...
Nerf vigibot

20210318_170013.mp4   3,31 Mo

20240303_154059.mp4   1,61 Mo

20240303_215106.mp4   2,92 Mo

20240303_214828.mp4   183,17 Ko

[french_storm972]

where is the 4X4 ?

[Mike118]

Which one ?

[french_storm972]

um the big 4X4
TRAXXA

[Mike118]

I only shared what I built. I never made a traxxas.

[french_storm972]

this car
is not my robot

[french_storm972]

is my robot

[firened]

Wow awesome photos :clapping:

[french_storm972]

is firs test
1years ...

[Mike118]

This is not mine

[french_storm972]

Ho ok

[garfield2142]

Sure, do you have any relays by any chance?

GPIO18

[firened]

Did the button have multiple functions?

How many wires are in the cable?

Can you measure if any of the wires for the button have a voltage? How much?
Ok.
2.4V ok. The positive is probably connected to an input of an IC with a pull-up resistor to either 3.3V or Vbat. Because your DMM has a resistance too, it can lower the reading.

If you touch the wires together it beeps, correct?
On the wires you measured the voltage between GND and the positive wire.

Now, Can you measure the voltage between the positive wire and Vbat? It will tell us whether the positive wire is connected to Vbat (reads about 0.5V) or 3.3V (reads 0.0V).
it's a little trick, i hope it works

If it's 3.3V you can connect it to the Pi without damaging the Pi.
If it's Vbat then you will need a transitor (BJT, FET) or relais.

I gotta sleep now.

[firened]

Hm that's... Something's not right.

Because 2.4V + 3.15V is more than Vbat, it can't be.

[firened]

GND, SDA, SCL to the same named pins.
Vcc to 3.3V.

Do you already know how to use the INA power pins V+ and V-?
Oh no wait
The INA measures current so all the current has to go through it. There's a low Ohm "shunt resistor" on it, over which it can measure the small voltage drop and with it the current.

So the INA V+, V- have to go inline with the load like this:

(Later some vigi website config changes are required.)

[firened]

@HyperS to enable the current bar on the website you'll have to adjust the config.
Find the correct spot and insert
```,
{
"NAME": "Current",
"INIT": 0,
"SCALEMIN": -3,
"SCALEMAX": 3,
"MIN": -3,
"MAX": 3,
"SIGNED": true,
"NBDIGITS": 3,
"UNIT": " A"
}
```

Make sure the comma `,` is there too.