need timed delay relay circuit, use induc

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2000vsm

Copper - Posts: 65

Joined: June 30, 2002

Posted: August 27, 2002 at 12:49 AM / IP Logged

ok.. how do i make a timed delay circuit? say there is a 12v trigger, and that goes to a relay.. how do i make the 12v signal delayed like 7 seconds before it activates the relay? do i use inductors or capacitors? i know inductors act as an short line when it's fully charged.. so i dunno? capactiors are the opposite....

help!

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go2pac

Copper - Posts: 179

Joined: May 04, 2002

Location: California, United States

Posted: August 27, 2002 at 11:34 AM / IP Logged

You would need more circuitry than capacitors. Inductors don't charge, capacitors do. Use our TR-7 universal trigger module. It has over 16 different features you can use.

Karl

Pacific Accessory Corporation

Mobile Audio Interfacing Equipment

Connecting You to Your Music Since 1976

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HotRod53F100

Copper - Posts: 84

Joined: May 12, 2002

Location: United States

Posted: August 28, 2002 at 5:20 PM / IP Logged

Go2Pac is correct, you need an RC circuit (resistive/capacitant). The circuit would consist on a CD4047, a resistor, a capacitor, a 2n2222 transistor, and a relay...some pretty basic stuff. You can vary the resistant value to change the time constant which alters the delay time. Sometimes it is much easier to buy something prebuilt and get it over with. Otherwise, check the net for a CD4047 or a 555 timer IC. You can also search for a mulitvibrator circuit.

HotRod

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need timed delay relay circuit, use induc

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