I am a newbe. Wired some projects With a Radio shack project kit.
Here is my dilemma: I just installed a remote car starter in my Chevy.
My goal is to have the car start by itself while I am by my machine at work. (I cannot leave my machine to start my car when it's -10*F + the keychain remote will not reach through a concrete/steel building)
The module has an "activation trigger" wire. (this will start the car W/O pushing the remote)
The trigger requires a neg. (-) pulse of 1 second or less. I will use a N.O. relay wired to chaises ground and the coil powered by this project.
I purchased a $12 countdown timer/alarm from a local hardware store that runs on a single AAA battery. I would like to use the timer/alarm to activate this Neg. (-) trigger (relay) but the alarm will output a Pos. (+) .75 Volt pulse (4 pulses a second for 30 seconds to a piezo buzzer)
I need to build a circuit that will give a Pos. (+) output of one sec. or less to a relay even though the circuits trigger will be Pulsing. ie. after the alarm has reached Zero.
I have up to 12V DC to work with.
Any ideas on how to make this work?
Thank you in advance for any help on this mater.
I understand that the LCD on this cheap timer may freeze up.
Is this a huge deal?
How picky are those displays? I haven't trashed one yet.
Trying to keep warm in Wisconsin.
Here is my dilemma: I just installed a remote car starter in my Chevy.
My goal is to have the car start by itself while I am by my machine at work. (I cannot leave my machine to start my car when it's -10*F + the keychain remote will not reach through a concrete/steel building)
The module has an "activation trigger" wire. (this will start the car W/O pushing the remote)
The trigger requires a neg. (-) pulse of 1 second or less. I will use a N.O. relay wired to chaises ground and the coil powered by this project.
I purchased a $12 countdown timer/alarm from a local hardware store that runs on a single AAA battery. I would like to use the timer/alarm to activate this Neg. (-) trigger (relay) but the alarm will output a Pos. (+) .75 Volt pulse (4 pulses a second for 30 seconds to a piezo buzzer)
I need to build a circuit that will give a Pos. (+) output of one sec. or less to a relay even though the circuits trigger will be Pulsing. ie. after the alarm has reached Zero.
I have up to 12V DC to work with.
Any ideas on how to make this work?
Thank you in advance for any help on this mater.
I understand that the LCD on this cheap timer may freeze up.
Is this a huge deal?
How picky are those displays? I haven't trashed one yet.
Trying to keep warm in Wisconsin.