Leduc, AB
Here is what I have.... A stand alone solenoid that is triggered with a switch but what I would like to do is delay power to the solenoid by a second after switch is hit ....is this easy to accomplish and how?
(Topic ID: 138418)
You'll need an "on delay" circuit, which would use a diode, resistor, and capacitor. The timing will depend on the value(s) of these components, but unfortunately, I'm not familiar enough with them to design a circuit like this from scratch. Additionally, the timing wouldn't be exactly perfect depending on temperature, but should be close enough. If you need exact timing, you would probably need a circuit with a 555 timer IC and crystal oscillator.
Quoted from Stretch7:Ok I don't need an exact delay but something from .5-2.5 seconds would be good enough.
Maybe someone could chime on A simple design for this?
I can help you. I just need specs on the load.
Need more information on the application... do you want the solenoid to latch on? Will the solenoid be held on by holding the switch like a flipper? How long will the solenoid stay on? What power supply do you have available? AC or DC? Specs on the solenoid? Are you driving the solenoid with a transistor or direct through the switch? What is the application? What are you trying to do with this solenoid?
Mac
Im trying to do a slight mod on a System 80 game.... It is 25v dc power source that is connected direct through a switch . Basically right now i have positive connected to coil and and negative through switch. What I'm trying to achieve is a delay of a second to give the ball time to settle in its place before it is kicked out...right now it kicks it out in the right direction 50 percent of the time because the ball doesnt get to seat in hole properly before getting kicked. As far as specs im sure it is the same as most others ...its 25 volts but around 20v under draw and approx 48 ohms . Im using a Gottlieb 5194 coil.
You really don't want to run your inductive load current through your switch... it will cause an arc across the switch contacts when the switch opens and eventually could burn up the contacts. A circuit similar to this could do what you want. Use a transistor like the ones that drive your solenoids. The resistor and capacitor value can be adjusted to provide more or less time delay. You cannot make the resister too big or you will not provide enough bias current to turn the transistor all the way on. The diode across the coil will keep the high voltage spike off of your supply lines when the coil is turned off.
Mac
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