Hi All
I was woking on my Ardunio UNO , then i think i did use a power more than 12V (16V ) via the V5 Sensor Shield ..which i guess did something with the Board ..now i wanna use my arduino UNO back ..is there any hope , I purchased the FTDI 232 Board to program it via Serial ..but i cant pass the Upload stage...i always get the msg :
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00
Note :
Power LED is always ON
Both TX and RX are always ON .
Please advise how can i still use the UNO .. ?
When programming your Uno, you need to reset it. This is usually done using the DTR line. If your FTDI has the DTR line proken out, you need to connect it to the reset pin of the Arduino.
Alternatively, you can press the reset button at the right time.
Another option can be to program via the ICSP heare; you will need a second Arduino for that or a dedicated programmer.
I have tried the method using the DTR to RESET Pin but it doesnt work at all ..
I am getting this msg
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00
i used a Capacitor 0.1uF Between DTR and RESET and Resistor 10K ..
Please let me know what was wrong ...
Other Pins Connected as follows :
- VCC to VIN ( UNO )
- GND to GND ( UNO )
- TX to RX ( UNO )
- RX to TX ( UNO )
If Tx and Rx pins are always ON, it means the 16U2 chip is probably damaged. Even it uses separate pins for LEDs, there is high probability that it is same with other pins include Rx, Tx so it means Rx,Tx on 328P chip are grounded via 1k resistors. You could try to remove these - it i one part with 4x1k resistors, 2 of them used for ON LED.
What else could be damaged, who knows?
..How can i know what pins can be used and what cant ... , and do you mean i can still programm the UNO or its completely lost ?? ..
Can i even use the ICSP Method ?
Budvar10:
If Tx and Rx pins are always ON, it means the 16U2 chip is probably damaged. Even it uses separate pins for LEDs, there is high probability that it is same with other pins include Rx, Tx so it means Rx,Tx on 328P chip are grounded via 1k resistors. You could try to remove these - it i one part with 4x1k resistors, 2 of them used for ON LED.
What else could be damaged, who knows?
How can i remove these 1K ..can u please explain more ?
Yes, you can use ICSP.
The board may not be completely lost. You can learn something at least but it is not so easy to repair.
If 328P is good you can remove it (DIL socket version) for later use.
wookieedookiee:
How can i remove these 1K ..can u please explain more ?
Schematics for UNO is here on web. I'm recommending to use Eagle and you can find it easy on the board, which part it is. Just desolder or cut pins. They are labeled RN4A, RN4B.
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