Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Need advice on relay / switch

Status
Not open for further replies.

rwh138

Newbie level 4
Joined
Apr 24, 2011
Messages
5
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,319
Hello Gentleman,

I need some suggestions, I am hitting road blocks trying to find the right off-the-shelf relay and/or switch. Hopefully you can help me out with a link or better define the product that I need to look for.

I have a 12 volt DC power supply that connects to two electrodes. I need switch / relay (12 volts 1-1 1/2 amps) with a settable interval timer (seconds or minutes) that will switch polarity back and forth on the electrodes while it is powered.

Any idea on where I can find such product.

I was thinking that the switch should have 6 terminals, 2 for inbound power and 4 for outbound power, 2 wires (+/-) to each electrode that be switched back and forth by a timer.

Thank you for your advice.

Richard
 

vinoth8051

Full Member level 3
Joined
Dec 21, 2009
Messages
179
Helped
67
Reputation
134
Reaction score
65
Trophy points
1,328
Location
Delhi, Kanpur, Madurai, India
Activity points
2,380
Hi rwh138,
You can build the same with 555 timer in Astable mode and an DPDT Relay. we can help you to do that.
If you wish to buy, kindly refer the link Instron Electronics - T-45 Series Timers subsection FORWARD - PAUSE - REVERSE TIMER T45-FR . (googled)
You may get more by googling "forward reverse timer" or like that
 

kak111

Advanced Member level 4
Joined
Mar 30, 2011
Messages
1,366
Helped
933
Reputation
1,868
Reaction score
907
Trophy points
1,413
Location
Finland
Activity points
10,942
Did you mean diy electronics kit or fixed modules ready to work.
In what country.

Regards KAK
 

rwh138

Newbie level 4
Joined
Apr 24, 2011
Messages
5
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,319
@ kak111,

I would be open to either do it yourself kit or fixed modules. I need to make up a few units so the easier it is, the better, I was hoping to get everything for around $6-10 a unit.

Thank you.

Richard
 

kak111

Advanced Member level 4
Joined
Mar 30, 2011
Messages
1,366
Helped
933
Reputation
1,868
Reaction score
907
Trophy points
1,413
Location
Finland
Activity points
10,942
For under 10$ is only one possibility , do it yourself from discrete components.

What is the control range for interval ( ie. min. .... max. time for 1 cycle) ?
( 50% time +/- and 50% time -/+)

Supply voltage 12Vdc
Output to electrodes 1.5A max
Other things ???

I can suggest you a circuit / schematic

Regards KAK
 

rwh138

Newbie level 4
Joined
Apr 24, 2011
Messages
5
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,319
@ kak111,

The desire time interval would to switch back and forth the 12 volt / 1.5A max DC every 60 seconds. Sounds simple but I haven't been able to find anything.

Thank you for your time.

Richard
 

KJ6EAD

Advanced Member level 3
Joined
Oct 6, 2010
Messages
709
Helped
196
Reputation
392
Reaction score
194
Trophy points
1,323
Location
Earth
Activity points
5,092
Google "interval timer". The Velleman Mk111 is an option if you modify the timing and add a DPDT relay. Commercial plug in modules can cost $100 or more.
 

rwh138

Newbie level 4
Joined
Apr 24, 2011
Messages
5
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,319
KAK,

Thank you for your time and attention.

Richard
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top