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For anyone looking for this information, I found http://stcvalve.com/ to be a good source. Thier prices are posted on their web pages. I ended up calling to place an order because thier shopping cart did not support HTTPS.

Thanks guys, It looks like McMaster-Carr also has a large selection.

I'm looking for a web site that sells pneumatic components. In particular, I'm looking for light duty actuators, hoses, fittings, electric valves etc... Any suggestions?

rawelk, The 555 timer Mono stable (one shot) circuit looks like exactly what I need! Thanks, -Capel

Guys, I’m not a student. I have a MS in Mech. Engineering, but I don’t have much experience with circuit design. I'm not trying to control my PLC output. I'm trying to control the INPUT to my PLC. Let me see if I can explain my situation a little better. I'm using a 12vdc Crouzet PLC with...

itsmoked, You have a valid suggestion, but here is why: 1)I don't want to change my PLC program. It still needs to work with the timer the same way. 2)I was thinking about powering the circuit with a 9vdc battery and don't want to leave it on for long periods of time.

I'm looking for some suggestions on how to activate a PLC. Currently I have timer that outputs +5vdc for about 30ms when it goes off. I use this to close a reed relay connected to my PLC input and start the PLC's cycle. What I want to be able to do is make a device that closes the relay for...

mcgyvr, Can you point me to a web site where I can pick up a $40 120vac-12vdc with 5 amp capacity? I have not seen one that cheap, but I'm probably not looking in the right place...

I have a 120vac to 24vdc transformer that will output 4.5 amps. I'm looking for an inexpensive way to step this down to 12vdc at 4.5 amps max. The current draw is not allways at 4.5, sometimes it is lower. Any suggestions on the best way to do this? Thanks in advance.

It is a used motor of some sort and came with a small belt drive pulley. I don't think it was a direct drive ceiling fan motor.

I have a 1/40 hp 115vac motor that I need to reverse. Am I going to have problems if the capacitor is located 60 ft away? I'm using a PLC with relays to switch the leads to change direction. Here is the wiring diagram: http://www.surpluscenter.com/Wire/W10-995.jpg

Good question electricpete. I'm new to this forum and just posted my question without looking to see if there was a more appropriate place. Thanks for pointing this out.

I must have been asleep in my EE class, but could someone enlighten me on the purpose of a capacitor used with an electric motor? Is it to store energy in order to "jump start" the motor? I'm looking at a cheap 115vac electric motor for a simple application and it says a 4 uF 370 VAC capacitor...

btrueblood, thanks for your post. 2 in/sec is what I have now and is too slow. I've been hesitant to run my actuator at 24vdc, but the cycle time is only 1 sec on 3 sec off. The Firgelli actuators are $100, so I could burn up 6 of them for the price of one Linak.

I just spoke to Linak and at $500 - $600 each, I think they are too expensive... Back to the drawing board.

Hi Kevin, thanks for the heads-up. I have been to the Linak web site before, but did not find anything fast enough. I just went back to it and found that they have just released an actuator that runs at 160mm/sec. This would work for me. I'm contacting them to obtain pricing. Hopefully, I can...

CakeMaster: the Firgelli linear actuators are belt driven. This is why I was thinking of building my own with a lead screw. Then I could design it to move as fast as I want, but I've got to put the limit switches, bearing etc in place. I was hoping to find something off the self. I have been...

Positional accuracy is not a major concern. Vel vs. time is not either. I'm limited to an electric device since the application has to be setup and broken down in the same day. The cost of hydraulics is too high and i'm trying to avoid pnuematics due to complexity. I'm using a PLC to operate...

I'm looking for a low cost/high speed linear actuator. At first I started using the http://www.firgelliauto.com/ products, but they are just too slow. Here are my requirements: 12-24 vdc 25 lbf min 4-6 in/sec rate of travel 3+ inches of travel low cost The system will extend/retract 3 or 4...