I want a delay timer off circuit for my car. I want the bluetooth radio adapter to remain ON for >2 seconds when I turn off the ignition. I tapped in to the cigarette lighter circuit to power the bluetooth. It turns on when the ignition key is in position 2 (switched 12v).
I built the circuit below found from this website. http://www.bowdenshobbycircuits.info/page2.htm
I also watched this video:
I used 1N4002 for diode
1000uF 16v capacitor
1kOhm resistor
NTE 102 or 2n2222 transistor
Tyco automotive relay (with a diode NTE 106)
Since I know very little about electronics, I don't know how to wire the circuit with 12V and ground where circles are shown on the diagram. What I did was to connect the battery/permanent 12V to the terminal 86 and terminal 30 of the relay. Terminal 87 to the bluetooth adapter. When I connect the battery 12V to the relay, the relay immediately kicks in even before I connect the switched 12V to the 1n4002. I don't understand why the transistor turns on the relay before I connect the switched 12V.
Can somebody tell me what am I doing wrong? Please explain how to power this circuit..
I built the circuit below found from this website. http://www.bowdenshobbycircuits.info/page2.htm
I also watched this video:
I used 1N4002 for diode
1000uF 16v capacitor
1kOhm resistor
NTE 102 or 2n2222 transistor
Tyco automotive relay (with a diode NTE 106)
Since I know very little about electronics, I don't know how to wire the circuit with 12V and ground where circles are shown on the diagram. What I did was to connect the battery/permanent 12V to the terminal 86 and terminal 30 of the relay. Terminal 87 to the bluetooth adapter. When I connect the battery 12V to the relay, the relay immediately kicks in even before I connect the switched 12V to the 1n4002. I don't understand why the transistor turns on the relay before I connect the switched 12V.
Can somebody tell me what am I doing wrong? Please explain how to power this circuit..
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