I'm learning about electronics bit by bit, making projects and tearing things apart
Jan 29th, 2012 by Alex
The Nokia 3120 Keypad SMS Sender has been updated to v1.1 to use the ATtiny261 and another ULN darlington array. View the project page.
v1.1 (29 January 2012) – Download
- Uses ATtiny261 to remove the extra transistor / mosfet circuit
- Uses a ULN2003A instead of 4 transistors
- Use a spare output on a ULN2003A to turn the phone on when we want to send an SMS
therefore saving the battery until we need it
- Use the watchdog timer instead of delay_ms
Buy the Standalone Temperature/Voltage Logger Kit starting from $14. Logs to an I2C EEPROM. Extract data via the USB port. At least 1 year battery life.
Buy the ATiny25 Tiny Temperature Logger Kit for $9 + $7 for Reader. Logs to an 512Kbit EEPROM.
Buy the ATtiny Programmer Adapter PCB for $4. Use this with your programmer to program all DIP ATtiny's more easily.
Buy the Gameboy Cart Shield PCB to use with your Arduino for $8. Allows you to dump GB/GBC carts and save/load game saves.