To connect a potentiometer to a PIC microcontroller is very simple. The circuit here is copied from the circuit that is on the PicKit 2's demo board (except that that circuit uses a 330 Ohm resistor, and this one uses a 1k Ohm resistor), and the software that comes with this board can be used to read it. In this case it is hooked up to AN0, which is also the programming input, but because of the high resistance this will not affect the programming of the microcontroller. In addition to the capacitor inside the microcontroller it is wise to keep an external one to avoid fluctuations in the readings.
Hooking up the servo motor is even simpler: a servo motor has 3 wires. Red is the main voltage line, which ideally is at +5V with at least 200mA, although at peak it could use over 500mA. Black is the ground and white is the control wire. The control wire can be hooked up to a PIC16F688 (or most other PIC) directly. Due to the very low frequency needed to control a servo motor there is no need to use PWM hardware, should this be available.
Geen opmerkingen:
Een reactie posten