Solar powered Motor controller with circuit diagram, PCB and code. This is based upon the ATTiny85, with code written and uploaded via the Arduino IDE.
This design is for a reporgrammable unit which can do different tasks, powered by a small solar PV cell and an ultra-capacitor.
The unit has an LED output, a Motor control output and a Piezo buzzer output.
ATTiny85 Arduino Pins:
| IC Pin: | Arduino Ref: | Attached: |
|---|---|---|
| 1 | 5/A0/RST | |
| 2 | 3/A3 | Vsolar |
| 3 | 4/A2 | Vcap |
| 4 | GND | |
| 5 | 0 - PWM | Piezo |
| 6 | 1 - PWM | Motor |
| 7 | 2/A1 | LED |
| 8 | +Supply |
Note: There are only 3 sleep modes for the ATTiny25/45/85
These are: IDLE, ADC power down and Power-Down
If we want to use the PWM to give an output then we need to use IDLE.
See datasheet for more details: http://www.atmel.com/images/atmel-2586-avr-8-bit-microcontroller-attiny25-attiny45-attiny85_datasheet.pdf
This runs a motor using stored power in the capacitor. When the Vcap voltage is above a certain amount the motor is run unit the voltage drops.
Control is as follows:
Automatically switches on an LED when the solar input is low. This will run until the capacitor voltage is too low.
Control is as follows:
'Chrips' a noise (using a piezo element attached to the motor connections) when there is sunlight. Rate and pitch of chirping depends upon solar input. Lower solar = lower pitch chirp and lower rate of chirp. Control is as follows:
'Chirps' a noise (using a piezo element attached to the motor connections) when the solar voltage is low (dark). Does this until the capacitor runs out. Control is as follows:
Some animals (cats, dogs, rats) and insects (mosquittos) respond to different ultrasonic frequencies of sound. https://en.wikipedia.org/wiki/Electronic_pest_control Some people question the effectiveness of this, so this is here for a bit of a trial, really - see what you think!
Control is as follows: