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Using an Arduino Duemilanove

• Download USB drivers from here 🡵

Using an Arduino to Program ATtiny85

From: Programming ATtiny85 with Arduino Uno 🡵

1. Configuring Arduino Uno as a ISP (In-System Programming)

• Connect your Arduino Uno to the PC. Open Arduino IDE and open the ArduinoISP example file (File -> Examples -> ArduinoISP) and upload it.

2. Adding ATtiny85 Support to Arduino IDE

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• By default Arduino IDE doesn't support ATtiny85 so we should add ATtiny boards to Arduino IDE. Open File -> Preferences and in the Additional Boards Manager URLs give this url: https://raw.githubusercontent.com/damellis/attiny/ide-1.6.x-boards-manager/package_damellis_attiny_index.json
• After this is done open Tools -> Board -> Board Manager
• After opening Board Manager scroll down the list where it says "attiny by Davis A. Mellis". Click on that and install it.
• After installing now you would be able to see a new entry in the Board menu

3. Connecting ATtiny85 with Arduino Uno

Connect the arduino uno to attiny85 using breadboard as below.

| Arduino Uno | ATtiny85 | REAL |

| ----------- | -------- | ----- |

| 5V | Vcc | VCC |

| Gnd | Gnd | GND |

| Pin 13 | Pin 2 | Pin 7 |

| Pin 12 | Pin 1 | Pin 6 |

| Pin 11 | Pin 0 | Pin 5 |

| Pin 10 | Reset | Pin 1 |

Add a 10uF capacitor between RESET and GND in arduino. This is to avoid arduino from being auto reset when we upload the program to attiny85. If you are using a electrolytic capacitor make sure the anode goes in GND of uno.

4. Uploading program to ATtiny85

• Now back to Arduino IDE. Select ATtiny under Tools -> Board. Then select ATtiny85 under Tools -> Processor. And select 8 MHz (internal) under Tools -> Clock.
• Then make sure Arduino as ISP is selected under Tools -> Programmer
• By default the ATtiny85 runs at 1MHz. To make it to run at 8MHz select Tools -> Burn Bootloader.

You will get the above message if burning bootloader was successful.

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