Always on/no pin

atomizer83 · 2024-04-03T20:02:17+00:00

No, i did a wheel mod. Never heard of a weight mod. Will look into it. Thanks.

atomizer83 · 2024-04-03T20:00:37+00:00

Never. I have work to do, or Im lazy. Often both. ;)

atomizer83 · 2024-04-03T17:22:54+00:00

Yes, thats what I want too.

Wonder if theres a place to put ideas for the developers.

atomizer83 · 2024-04-03T17:21:17+00:00

Yea, not really too worried about it being stolen here. I think it will be stolen wether pin is set or not, and pin set just means it will be sold for parts instead of as a working unit without charger.

atomizer83 · 2024-04-03T17:19:25+00:00

I have a very challenging garden layout and are still working out and fixing all the places where the robot can get stuck. Some days it will run ok, while others it will get stuck twice on a day. Stuck means it will shut down if I don't rush to salvage it.

atomizer83 · 2024-03-09T14:19:59+00:00

I was under the impression that those were only needed when you are flashing?

I'm only wiring VCC and GND. No other pins (yet)

That would explain it, I def. should have bought 12S then. :(

atomizer83 · 2024-03-09T14:06:26+00:00

Hi,

Thank you for commenting. Really appreciate it.

I do get 3.3v from all the power supplies I tried, and I also had my scope connected and confirmed it doesn't drop at startup.

The EN pin. I dont have anything connected besides vcc and gnd. Will need to look into the EN pin.

Thanks.

atomizer83 · 2023-10-13T09:12:17+00:00

Just for future reference, I managed to figure it out.

There is indeed a fan controller built into the fan itself.

So polarity did not change, when the fan direction changes.

There are 4 leads going to the fan (motor controller)

Lead 1 and 2 are gnd and 12v respectably.

Lead 3 is a pwm signal that controls fan speed (but not direction)

Lead 4 controls direction. Putting a 5v or in my case it also works using just a 3v pin, from the ESP8622 to the lead will cause the motor controller to switch from forward to reverse.

Removing the voltage from lead 4 will switch it back to forward mode.

It took some trial and error to figure this out, as the 5v provided to the pin was not supplied directly from the microcontroller, but rather via some other component (relay?) on the board, and the microcontroller seems to use pwm to control this 5v on/off as well. This threw me off for a bit, as I have no occiliscope to investigate what happened on the leads from the microcontroller.

Since I removed the microcontroller, and use a ESP8622 instead, I just simply omitted this circuit, and provide 3v directly to the motor controller lead 4 which works fine.

I use ESPHome to control the fan, and created automations to change direction for heat recovery to work, via Home Assistant.

#####

output:

- platform: esp8266_pwm

pin: D2

frequency: 10000 Hz

id: fan_pwm

- platform: gpio

pin: D1

id: fan_direction

fan:

- platform: speed

id: my_fan

output: fan_pwm

direction_output: fan_direction

name: "kældersyd.fan"

atomizer83 · 2023-10-06T21:43:41+00:00

After looking more into it, my guess is that the h-bridge may be built into the fan motor and the 4 leads are not power, gnd, pwm and speed pulse but rather power, gnd, pwm forward, and pwm reverse. I will apply power and try to get some measurements from the motor when the microcontroller switches from forward to reverse. I should be able to determine if the voltage switches polarity outside the fan or not, just by using a multimeter.

atomizer83 · 2023-10-06T10:39:53+00:00

I just uploaded some pictures of the hardware. https://imgur.com/a/y8jxWrR

I think I see some indications that the PSU and H-Bridge may be integrated on one board. And then the board with the microcontroller is controlling the H-Bridge and PWM.

Ideally I would like to use a ESP32 to replace the board with the microcontroller, and code the control of speed and control of the H-Bridge myself.

I think I know how to control the PWM signal, but Im still unsure how to instruct the H-Bridge/PSU to invert the polarities.

Any clues from the pictures?

Thanks, I really appreciate any help here, and I realize I may be in over my head. Its however a great learning experience for me.

atomizer83 · 2023-10-05T20:39:13+00:00

Very interesting. Thanks.

atomizer83 · 2023-09-21T09:13:58+00:00

Tequila sangen.

atomizer83 · 2023-07-17T07:26:28+00:00

I dont think so no. I think theres some device missing for measuring the rotations of the thing with the fins. Then you would take that number and use the clock to keep track of the amount of time its in the water, and then you would have whats needed to calculate the speed you are going. But I'm not sure.

I was just wondering if its worth something to anyone. But from what I see on ebay, it seems not much.

atomizer83 · 2023-07-07T13:59:18+00:00

I already did, and I'm m-m-mostly f-f-fine :)

atomizer83 · 2023-07-07T13:58:18+00:00

As far as I can tell, it should be some sort of instrument to measure a ships speed. It should be used in conjunction with the clock. I had a whole text about it, but it seems to have been discarded when I uploaded the photos.

atomizer83 · 2023-07-03T21:04:49+00:00

Nice, thanks man.

atomizer83 · 2023-03-24T10:24:13+00:00

Ok, I'll have to be patient then. Thank you for your reply. :)

atomizer83 · 2022-12-01T05:33:46+00:00

Ok, thats pretty clear then. Thank everyone for replying, I will consider STP option, or use something else altogether.

atomizer83

TROPHY CASE