SUPER85

You can do a lot with just 5 pins.

                  .-----___-----.
         RESET ---| O           |--- VCC
PB3/ADC3/~OC1B ---|   TINY85    |--- PB2/ADC1/SCL/T0
PB4/ADC2/OC1B  ---|             |--- PB1/OC0B/OC1A
           GND ---|             |--- PB0/SDA/OC0A/~OC1A/AREF
                  '-------------'

This is a collection of short Arduino sketches I have written for the ATtiny85 microcontroller.

Included sketches

smartboost: software-configurable boost converter power supply
clocksync: synchronize DC motor to mains frequency to run electric clock

Notes

I prefer the Sparkfun Tiny AVR Programmer to program the ATtiny85s.
The circuit diagrams, where included, have been rendered with Schemascii.
Unless otherwise noted: for those sketches that use I2C communication, SDA and SCL are as indicated in the diagram above and require external pull-ups, and the protocol for communication is a standard register-based read-write method, done as follows:
- To write a register or block of contiguous registers: write the first register's index, followed by register contents. Register pointer auto-increments, and wraps at the end. In Arduino code:
```
Wire.beginTransmission(XXX);
Wire.write(regAddress);
Wire.write(myData, sizeof(myData));
Wire.endTransmission();
```
- To read a register or block of contiguous registers: write the first register's index, issue an I2C restart, and then read. Register pointer auto-increments, but does not wrap at the end. In Arduino code:
```
Wire.beginTransmission(XXX);
Wire.write(regAddress);
Wire.endTransmission(false);
Wire.requestFrom(XXX, NNN);
```
The built-in I2C slave functionality is only present in Spence Konde's ATTinyCore, please use that when compiling these sketches.

dragoncoder047/super85

SUPER85

You can do a lot with just 5 pins.

Included sketches

Notes