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Title: Problem Burning Bootloader to ATtiny13A Using Arduino as ISP (Tried 10 Times)

Hi everyone,

I'm trying to burn the bootloader onto an ATtiny13A using an Arduino Uno as ISP, but I haven't been able to make it work even after 10 attempts. Here’s what I’ve tried so far:
for this project help me i have changed multiple attiny 13a for the purpose.

My Setup:

  1. ATtiny13A Wiring:
    • Pin 1 (RESET) → Pin 10 on Arduino.
    • Pin 4 (GND) → GND on Arduino.
    • Pin 8 (VCC) → 5V on Arduino.
    • Pin 7 (SCK) → Pin 13 on Arduino.
    • Pin 6 (MISO) → Pin 12 on Arduino.
    • Pin 5 (MOSI) → Pin 11 on Arduino.
  2. Capacitor: I’ve tried both 33µF and 10µF capacitors between RESET and GND on the Arduino Uno.
  3. Arduino as ISP: Uploaded the ArduinoISP sketch to the Uno successfully.

Settings in Arduino IDE:

  • Board: ATtiny13 (using MicroCore).
  • Clock: Internal 9.6 MHz.
  • Programmer: Arduino as ISP (NOT Arduino as ISP (ATmega32u4)).
  • BOD: Disabled.

What Happens:

  • When I try Tools > Burn Bootloader, I get the error:
    avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync
  • Tried slowing down SPI clock by changing #define SPI_CLOCK in the ArduinoISP sketch to (F_CPU / 256)—still no luck.

Things I’ve Tried:

  1. Double-checked wiring multiple times.
  2. Tried different capacitors (33µF, 10µF, and no capacitor).
  3. Verified the ATtiny13A is not damaged (used a fresh chip).
  4. Restarted Arduino IDE and reconnected everything.
  5. Slowed down programmer speed in the ArduinoISP sketch.

Questions:

  1. Could the issue be with the ATtiny13A fuse settings?
  2. Should I try a USBasp instead of the Arduino Uno?
  3. Is there a common mistake I might be missing?

Any help or guidance would be greatly appreciated. Thank you in advance!

Feel free to copy, tweak, or add details before posting. Let me know if you need help refining it further! :rocket:

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2

Don't add the output as images.

Error: unable to open port COM4

Something tells me you're not doing the whole Upload Arduino as ISP sketch, choose programmer, Burn bootloader correct. Did you perhaps install the capacitor before uploading the ISP sketch?

3

Maybe you selected the wrong PORT. Go to Tools>PORT and select the correct PORT in case it is wrong.

4

i did, capacitor placing it before burn bootloader. Checked with COM4 its uploading on UNO but not on Attiny 13A. that is the big issue here, i did try changing the chip and checked the connection still fail. I will try with another system if that works over other.

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So you didn't connect the cap before uploading the ArduinoISP sketch to your Uno. Just wanna make sure.

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