kitcat
- 21st July 2005, 16:37
Hi.
I need to drive 16 latching solenoids.They all have a common feed and an individual return and by reversing the polarity I can latch or unlatch them.
I guess I have to send a positive pulse to all the ones I want to latch and then a negative pulse to all the ones I want to unlatch. I guess that one way of doing it is to have a relay switch the polarity driven by an output pin on a pic and then some sort of drive circuit for the individula lines to the solenoids. I am struggling to find an elegant solution for this. I started down the uln8203 route until I discovered they needed their polarity reversed. I want to try to avoid having to use loads of mechanical relays. can someone show me a neat solution.
Thanks
I need to drive 16 latching solenoids.They all have a common feed and an individual return and by reversing the polarity I can latch or unlatch them.
I guess I have to send a positive pulse to all the ones I want to latch and then a negative pulse to all the ones I want to unlatch. I guess that one way of doing it is to have a relay switch the polarity driven by an output pin on a pic and then some sort of drive circuit for the individula lines to the solenoids. I am struggling to find an elegant solution for this. I started down the uln8203 route until I discovered they needed their polarity reversed. I want to try to avoid having to use loads of mechanical relays. can someone show me a neat solution.
Thanks