First question for anyone reading this … why? Well, I’ve a few ideas for using this tiny microprocessor. There’ll be a post along very soon after this one.
Here’s the datasheet for this fantastic device.
Just about all the information needed to do this can be found in High-Low Tech’s Programming an ATtiny w/ Arduino 1.0.1.
They describe the process using an Arduino Uno whereas I’m using a Nano. Very little difference except as follows:
The pinout of the Nano is different. So here are the SPI connections.
- ATtiny Pin 2 to Arduino Pin 16 (D13 SCK)
- ATtiny Pin 1 to Arduino Pin 15 (D12 MISO)
- ATtiny Pin 0 to Arduino Pin 14 (D11 MOSI)
- ATtiny Reset Pin to Arduino Pin 28 (RESET)
One other difference I found when following the section called “Configuring the ATtiny to run at 8 MHz (for SoftwareSerial support)”, I needed to set the following:
- “ATtiny85 (Internal 8MHz clock)” in the Tools > Board menu
- “Arduino as ISP” in the Tools > Programmer menu
These settings are mentioned later in the tutorial but I found I needed to set them at this stage.
Otherwise, everything worked as stated.
Figure 1 below shows the schematic:
Figure 2 shows the breadboard setup for programming the ATtiny85 plus some LEDs to have a go at programming it: