Hello Everyone,

I am working on a car and I am planning to shave the handles. I don't want to rely on a remote to activate the solenoids and open the doors.

I currently have an alarm installed. The car doesn't not have locking door latches. Research has directed me to a magnetic locking relay. The alarm has provisions for a positive pulse and a negative pulse for the triggers.

It also has PKE. My vision is to walk up to the car, have the PKE activate, send an unlock signal in the form of a pulse that activates the coil of the latching relay, and sends power to the switch.

I attached a picture of the wiring diagram for the positive trigger door locking option. I will have 2 positive triggers for lock and unlock.

Can anyone recommend a relay that will work off of a 12V pulse and hold its state with the power off? Until another pulse is applied to change its state.

 

Welcome to AAC.

I am having a little trouble in reconciling parts of your description.

You say:

...activate the solenoids and open the doors...

but you also say:

The car doesn't not have locking door latches.

If the door does have some locking mechanism based on a solenoid, a latching relay will apply continuous power to it which can't be good. So, what are you trying to control with the latching relay?

 

Thank You.

"I don't want to rely on a remote to activate the solenoids and open the doors"

Most door popper kits give you a 2-8 channel system. You designate a button on the fob to open the driver's door and so on. I do not want to integrate a remote that I will have to press buttons. My current remote works on proximity and I do not have to take it out of my pocket.

"The car doesn't not have locking door latches"

The locking mechanism was removed for fitment. This is not a production vehicle, so to get the latch to fit, without an immense amount of work, it had to be removed.

If the door does have some locking mechanism based on a solenoid, a latching relay will apply continuous power to it which can't be good. So, what are you trying to control with the latching relay?

The solenoid is to open the door. When activated the latch releases and the pressure from the door pusher swings the door open.

I want the latching relay to supply continuous power to a momentary switch, that will activate the solenoid.

I apologize if I didn't state my intentions clearly.

Thank You for Your help.

 

Amazon have a 12v magnetic latching relay !
https://www.amazon.com/12v-dc-latching-relay/s?k=12v+dc+latching+relay

 

It also has PKE. My vision is to walk up to the car, have the PKE activate, send an unlock signal in the form of a pulse that activates the coil of the latching relay, and sends power to the switch.

What outputs does the PKE system have and how did it work before you removed the door latches? Most factory PKE systems require the user to put their hand at the door handle or pull the lever or press a button and if the key is also detected the door will unlock - they don't usually just unlock or pop the door open as soon as the key is detected. Aftermarket PKE system i've seen appear to be more of a proximity sensor and once the 'key' is detected, the doors automatically unlock and then lockagain when the key is not detected. Aftermarket PKE should be straightforward as the PKE system should output an 'unlock signal' when the key is detected and then an 'lock signall' when the key is not detected. Factory PKE system would require a bit more investigating to determine how it works.

How do the door poppers currently work. I assume you have a relay to provide power to the popper solenoid when a momentary switch is pressed? or do you have the controller that would have received the remote button press signal?

Once you know the output signal the PKE system provides you can workout how to use that to trigger the door popper system to pop the door open when the key is detected. Similar to how after market car alarms control central locking systems.

Good Luck

 

Thank you for your response.

This is not a factory PKE system. It is aftermarket. It does indeed send an unlock signal, in the form of a 12V pulse, or a ground pulse, when the key is detected. Depending on which style central locking system the car has, you choose the method.

The door poppers are currently configured to run through 2 separate 40A relays. The car is not ready for the road, so I have constant power going to 2 momentary push button switches. Pushing the button engages the relays controlling the actuators.

I do not want to control the doors "popping" with the remote, I am using the shaved handles as a locking system. The plan is to have an illuminated momentary switch. When I am in range for the PKE system and the door unlock signal is sent, the switches will illuminate. I want power to be available to the switch allowing a push of the button to send power to the relay. I want that power active until I press the locking button, which in turn would remove the available power, the light for the switch would go off, and the system would essentially be locked

This is for a Factory Five GTM Supercar

 

Amazon have a 12v magnetic latching relay !
https://www.amazon.com/12v-dc-latching-relay/s?k=12v+dc+latching+relay

Worked like a charm!