Hi all! I am new in electronics and need some advice.
I need to build a circuit that will power a linear actuator with built-in end switches like this one:
http://www.firgelliauto.com/product_info.php?cPath=79&products_id=31
for as long as I hold a push button depressed.
At the end of the actuator's travel the polarity to the motor should be reversed until the actuator retracts all the way to it's other end and then reverse polarity again to extend, and so on... until I release that push button.
The end switches are internal and not accessible and the actuator has only a cable with two poles.
I was thinking that measuring the voltage across the legs of a low value high wattage resistor that is connected in-line to the circuit output would be a nice way for the circuit to "sense" that the actuator has reached it's end of travel and switched off it's motor. No (high) current flow - no voltage drop across the resistor.
Simple PIC solutions are welcome too - you'll have to right the program for me though...
Thank you in advance!
Dimitrios
I need to build a circuit that will power a linear actuator with built-in end switches like this one:
http://www.firgelliauto.com/product_info.php?cPath=79&products_id=31
for as long as I hold a push button depressed.
At the end of the actuator's travel the polarity to the motor should be reversed until the actuator retracts all the way to it's other end and then reverse polarity again to extend, and so on... until I release that push button.
The end switches are internal and not accessible and the actuator has only a cable with two poles.
I was thinking that measuring the voltage across the legs of a low value high wattage resistor that is connected in-line to the circuit output would be a nice way for the circuit to "sense" that the actuator has reached it's end of travel and switched off it's motor. No (high) current flow - no voltage drop across the resistor.
Simple PIC solutions are welcome too - you'll have to right the program for me though...
Thank you in advance!
Dimitrios