My shutter

[FourDee]

Yesterday, I received my solenoid I planned on using as a safety shutter in the mail. (It was smaller than I expected)

I got to work right away. I made a flag, a driver and a mount

Here are the results

ps: The L-piece the solenoid is mounted on will be shortened

[Stuka]

Yesterday, I received my solenoid I planned on using as a safety shutter in the mail. (It was smaller than I expected)

I got to work right away. I made a flag, a driver and a mount

Here are the results

ps: The L-piece the solenoid is mounted on will be shortened

Nice - small is good in this case!

If you don't mind, post the details on the parts, circuit, etc. you used - that looks like something many of us could use!

Randy

[Anthony]

nice work, buurman :-)

[thesk8nmidget]

nice looking shutter! i like it!

[FourDee]

The circuit is pretty straight forward. An optocoupler and a mosfet (with internal protection diode).

You could even drive the mosfet directly, but I like to be safe
The circuit draws less than 6mA from the dac at 5V. The mosfet here can drive loads up to 30 amps at 10 volts
You can choose any optocoupler/FET combination, but if the mosfet doesn't have an internal protection diode, don't forget to add one externally

V+ and V- are the power connections (any voltage up to 55V)
S+ and S- are signal connections (5v ttl)
C1 and C2 are the connections for the solenoid coil

[MechEng3]

Nice! Should handle a lot more load than a TIP120 ! This has a lot of other uses as well...

[FourDee]

You can add a led with a series resistor parallel to the solenoid for an emission indicator too
(that's what i did)

ps: the +5V on the schematic is just in my case, you can use whatever voltage you need for your shutter

[Stuka]

Thanks for posting!

[loopee]

I have a solenoid similar to that one that I’m thinking of installing into my projector, but I was going to use a flag design like this

I see the benefits of this being:
1. The flag is balanced therefore requiring less effort to move and increase responsiveness of the shutter.
2. As the flag is balanced less vibration is created (less likely chance that the flag will slip on the shaft)
3. And as both sides of the flag are used (top and bottom) the beam cut off would be faster
Similar to your design it would be it setup so that it needs to be powered to un-block the beam and the only issue would be if something happened to the spring.

[James Lehman]

If you forget about the response time of the motor and just look at the TTL switch, how fast can that thing go?

James.