This is a electronics test project with Microchips ATtiny814 for home decoration. The context is a fading light platform (LEDs) with an integrated timer.
ON / OFF time interval can be adjusted by code
#define OPERATION_TIME 21600L /* seconds (6 hours) */
#define SLEEP_TIME 64800L /* seconds (18 hours) */Also the blinking / fading interval is adjustable
#define PERIOD (100)
#define DUTY_MAX (PERIOD)
#define DUTY_MIN (5)
(Made with Fritzing)
- 1x ATtiny814-SSN
- 1x SOIC-14 to DIP-14 Adapter
- 1x ISP Socket (6-Pin)
- 3x LED Green (Ultrabright)
- 3x Resistor 130 R
- 3x Resistor 4.7k R
- 3x BC337-40 Transistor
- 1x Switch On/Off
- 1x Watch-Quarz 32,768 kHz
- 2x Ceramic Capacitor 12pF
- 1x Ceramic Capacitor 100nF
- 1x Batteryholder 2xAA
Total estimated costs: Less than 2,00 € without batteries (10.03.2020)
Strongly depends on the quality of the inserted batteries and your soldering work. I would say between one and two months with the 8/16 setting.
(The circuit board was embedded in epoxy resin)