Hi I'm trying to activate a home-built solenoid with my computer. Here's what I have so far:
1) the solenoid is just a plastic pen with about 50' of thin wire wrapped around it. There is a smooth steel rod in the pen which works as the piston. When I apply 12 volts to the wire ends, the piston goes up. Turn the voltage off, it drops back down. Yea.
2) I have a solid state relay connected to my parallel port and the solenoid. Using a program I found (ksi8.exe) I can send a 3 volt signal from the parallel cable by pressing a number on the keyboard.
When I hit the right key, this closes a circuit on the relay and voltage can pass through to a light or a motor and it works! On, off, on, off, all day.
BUT...with the solenoid, it activates but won't turn off when I turn off the signal from the parallel cable. Just stays humming in the up position until I turn the power off. The SSR is a Crydom CX24D05 and works with other 12 volt DC thingys, but not the solenoid.
That's all there is. I'll try to attach a crude illustration. Just wordering why it sticks on. Much obliged for any help.
1) the solenoid is just a plastic pen with about 50' of thin wire wrapped around it. There is a smooth steel rod in the pen which works as the piston. When I apply 12 volts to the wire ends, the piston goes up. Turn the voltage off, it drops back down. Yea.
2) I have a solid state relay connected to my parallel port and the solenoid. Using a program I found (ksi8.exe) I can send a 3 volt signal from the parallel cable by pressing a number on the keyboard.
When I hit the right key, this closes a circuit on the relay and voltage can pass through to a light or a motor and it works! On, off, on, off, all day.
BUT...with the solenoid, it activates but won't turn off when I turn off the signal from the parallel cable. Just stays humming in the up position until I turn the power off. The SSR is a Crydom CX24D05 and works with other 12 volt DC thingys, but not the solenoid.
That's all there is. I'll try to attach a crude illustration. Just wordering why it sticks on. Much obliged for any help.
Attachments
-
40.6 KB Views: 50
Last edited: