Short circuit
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I guess the heater and mini height sensor contacted each other. When I plug it to usb, U1 starts heat up right away. Also, when I plug Panel Duo to pc via usb, U1 on panel stars heating. There is no visual. I might have burnt it all. Both duet wifi and panel duo were destroyed.
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Sadly it sounds that the heater shorted to the +3.3V pin on the IR sensor, and that will have destroyed multiple ICs on the Duet including the processor.
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Hello,
On the head part, we have a card to which we plug flex cable. If we add a protection on it, can we avoid these kind of accidents? Do heat and sensors work well? -
The sensor inputs are already protected fairly well against miswiring. So the main risk is shorting the +3.3V feed to the IR sensor, or the +3.3V feed to an endstop switch (if you use 3-wire endstop switches), to a heater or fan connection. We are considering putting a Schottky diode in series with the 3.3V feed for the next-generation Duet, but that would reduce the voltage to a little under 3V, and we need to make sure that the IR sensor and the Smart Effector can operate on about 2.8V first.
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Hello there. I bought new duet wifi and panel due. My previous card was burned due to short circuit. I installed a new mini height sensor board on my new card, checked the connections but the leds are dimly lit, so might it be burnt with the old card?
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If you did get a short between the +3.3V connection and a heater or fan connection, then it's likely to have damaged the IR sensor too because the microcontroller is rated at 6V. I can replace and reprogram the microcontroller for a fee, but unless you are in the UK the carriage costs are likely to make that uneconomic.
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thank you davit i will order a new card as also the temperature sensor is burnt
PT100 temperature sensors
Messages Error: Failed to initialise RTD: bad response from sensor
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hello, if you can give me the bom list of your height sensor I would like to change
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I would like to ask if we can connect wifi rc servo motor except 5 step motor
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hello, if you can give me the bom list of your height sensor I would like to change
The values and part numbers are listed on the schematic. The resistors and capacitors are all 0603 size and the inductor is 0805.
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I would like to ask if we can connect wifi rc servo motor except 5 step motor
I'm sorry, I don't understand the question.
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İs a short-circuit occasion effect PT100 board? Apart from that, I purchased ATTINY-25-205U Rohs piece but can't find any software for that. Could you help me about this situation?
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The manufacturer of the PT100 chips claims that the chips are protected against voltages up to +/- 45V on the PT100 terminals. The damage done to your PT100 board was almost certainly caused by the 3.3V power rail being shorted to a higher voltage.
The firmware source code for programming the attiny on the IT sensor board is on github along with the schematic I linked to earlier.
