#126 ATtiny Hardware Interrupt
Test hardware interrupts with an ATtiny85 processor on a breadboard.
Here’s a quick video of the circuit in action:
This is a little test of hardware interrupts with an ATtiny85 microcontroller (8-pin DIP).
I’m using an Arduino Uno as an in-system programmer, using the technique described in the ProgrammingWithArduinoISP project.
A push-button is attached to D2 (pin 7 of the chip) and a hardware interrupt service routine activates on rising edge. When an interrupt is received, it triggers a little LED blinking procedure just for demonstration purposes.
Once the ATtiny is programmed, the Arduino Uno ISP is detached, and it will run independently.
The ATtiny85 requires 1.8-5.5V to operate. I successfully tested with 3.3V and 5V supplies.