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Question about hijacking other devices gate transistors.
msuffidy:
So I was thinking of getting some cheap used RGB strips that appear to have connector leads, that I am guessing are some sort of straight up power with no logic and are coloured RBG,black. Some of these have boxes, which I am guessing have some sort of gate transistors as a last thing in the chain of devices.
Say the control pin of the transistor was severed from the trace, and a new lead was introduced. If you have an arduino, could you somehow control the transistor directly, or do you have to like use an optocoupler and power it on the strip side off of it's own circuitry? The main problem here is a risk of backwash to the arduino, and also different interpretations of like ground?
Here are some suspect transistors.
Zero999:
It would be much easier to buy some transistors and use them to control the LED strip, with the Arduino driving them.
SteveyG:
It's not clear what you're hoping to achieve by modifying the controller. Are you hoping to use the integrated power supply as well?
Zero999:
--- Quote from: SteveyG on December 15, 2021, 09:58:24 am ---It's not clear what you're hoping to achieve by modifying the controller. Are you hoping to use the integrated power supply as well?
--- End quote ---
The board doesn't appear to have any mains on it and if it does, it shouldn't be used because the creepage and clearances are insufficient.
msuffidy:
The idea was to take over the switching of the led lights with the arduino, and use PWM for dimming. I have not got the strips yet, so this is not the exact board, but they seem to follow this general pattern of having these 3 transistors. There is an external brick so there should not be any power regulator stuff on the board.
Thanks for the comments though.
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