The classic edition is the one that started it all. I believe that a hackable bare-bones timer is perfect for some situations.
- ATTiny85 Microprocessor
- Arduino IDE compatible – limited command set on Tiny series processors.
- 6 pin ISP header for programming
- 4.5 amp rating -limited by trace thickness and width on PCB
- Relay is rated for 10A so it should deliver good durability.
- Features an input header connected to an Analog pin on the chip. This increases versatility.
Reason Developed: I needed a way to economize the use of my water recirculating pump while ensuring I had hot water in the house. I designed and built this circuit to run for 75 seconds and then wait for 450 seconds. I wanted to be sure I could modify it in the future if the need arose. I built this project after taking the Advanced Arduino course from TXRX Labs. Credit for design review and constructive feedback goes to the great folks at TXRX Labs.
Eagle Files: tinytimer-classic-eagle-files
Board Layout and Schematic: