Gt Concepts
- Nov 13, 2006
- 3
- Joined
- Nov 13, 2006
- Messages
- 3
Hey guys,
I'm looking for ideas for a timer circuit, basically I want to make a remote window roll up/ down function for my car using the factory door lock remote.
I want to sense the .5 sec 12v pulses going to the power door locks.
I need to start a 3 second timer with the first pulse, then close an output if another pulse is detected within the 3 second window. It also must reset after the 3 seconds has elapsed. I dont think a simple RC circuit will be dependable enough to maintain a 3 second window.
If within a 3 second time frame I press the remote lock twice within 3 seconds it closes an output to the the auto up switch, conversely if I press the remote Un-lock twice within 3 seconds it closes an output to the the auto Down switch.
I have the auto switching part worked out, but I need help with the time part.
I'm looking for ideas for a timer circuit, basically I want to make a remote window roll up/ down function for my car using the factory door lock remote.
I want to sense the .5 sec 12v pulses going to the power door locks.
I need to start a 3 second timer with the first pulse, then close an output if another pulse is detected within the 3 second window. It also must reset after the 3 seconds has elapsed. I dont think a simple RC circuit will be dependable enough to maintain a 3 second window.
If within a 3 second time frame I press the remote lock twice within 3 seconds it closes an output to the the auto up switch, conversely if I press the remote Un-lock twice within 3 seconds it closes an output to the the auto Down switch.
I have the auto switching part worked out, but I need help with the time part.
