422 Servotester
422 : Servotester
- Author: Jonas Wuehr
- Description: Generate a 50 Hz test signal for RC servos.
- GitHub repository
- Open in 3D viewer
- Clock: 10000000 Hz
How it works
It uses a 10 MHz clock to create a counter, which has it's carry signal every 50Hz. Then there is a second counter to create the 1 - 2 millisecond high signal according to the user input.
How to test
Connect a servo PWM signal to biderectional pin 7. According to the user input on the inputs it's position will change and be indicated on the 7-segment display.
External hardware
A RC servo is required for testing.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | position bit 0 | ||
| 1 | position bit 1 | ||
| 2 | position bit 2 | ||
| 3 | position bit 3 | ||
| 4 | position bit 4 | ||
| 5 | position bit 5 | ||
| 6 | position bit 6 | ||
| 7 | position bit 7 | servo pulse |