// // Workflow: Schematics: // --------- ----------- // * Pin 3, 4 are GND. LED // * Pin 3 is changed to ADC SCL --> D1 / // * While measurement LED is LOW. \ / // * Pin 4 goes HIGH. VCC \ | SCA ---> D2 // * measure time V(t) on Pin 3 | \ | | // * i2c is connected to 2 (SCL) and 0 (SCA) ---o-----o-----o-----o--- // * Time / Capacity is sent to i2c master. | 2 1 0 | // * Measurement is finished, LED goes HIGH. \ | // | ATTINY 85 | // / | // | 3 4 | // ---o-----o-----o-----o--- // | | | | // | | R GND // RST | R // | R R=7.3Meg // | | // +-----| // | // C ===== // | // GND // // // // // About Fuses: // http://www.engbedded.com/fusecalc/ //