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Old 7th October 2002, 12:37 PM   #1
PedroPO is offline PedroPO  Portugal
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Default Pulse Power Switch

Hi all.

I'm looking for a relay to switch an aleph 5 on and off, like Edwin Dorre used on his amp.

Another Aleph finished!

I talked to him, but he could't see the brand of the relay.

He says he used a 220V AC coil 16A bistable (latching Relay).

I tried to find such relay in Omron, Finder,Schrack (Tyco), but I couldn't find a bistable relay that could be changed with only one momentary button. there are several that can be changed with two momentary switches.

If anyone uses such a relay and know is brand/part # please advise.

thanx,
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Old 7th October 2002, 05:14 PM   #2
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Default Take a look in RS Components

I have bought these from RS before (for a friends lighting), so i know they stock them - can't give you a part number off the top of my head but they do have an excellent website and you should find them without too much trouble.

www.rswww.com

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Jason.
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Old 7th October 2002, 05:17 PM   #3
PedroPO is offline PedroPO  Portugal
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hey Jason!

So I'm not the only cartoon guy in town

thanks, i'll look and say something.
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Old 7th October 2002, 07:01 PM   #4
PedroPO is offline PedroPO  Portugal
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no can do.

I only find latching relays for DC or for two button work( one for on other for off).

If you really used only one momentary button with your relay, please try to know what relay did you use, pls.

thanks,
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Old 7th October 2002, 08:29 PM   #5
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Hello PedroPO,


You can use next circuit if you can't find the special relay.
It is very simple and it's working ok.

Here is the text that I find with the enclosed circuit :

Use this circuit instead of a standard on-off switch.
Switching is very gentle.
Connect unused input pins to an appropriate logic level.
Unused output pins *MUST* be left open!.
First 'push' switches ON, another 'push' switches OFF.
You can use 1/4 watt resistors if they are metal-film type.
Any proper substitute will work for Q1, including the european TUN's. For C2, if you find the relay acts not fast enough, leave it out or change to a ceramic cap between 10 and 100nF.

Parts List:
All resistors are 1/2 Watt and 5% tolerance.
R1 = 10K
R2 = 100K
R3 = 10K
C1 = 0.1uF, Ceramic
C2 = 1uF/16V, Electrolytic
D1= 1N4001
Q1 = 2N4401 (ECG123AP, NTE123AP, etc.)
IC1 = MC4069, CMOS, Hex Inverter (MC14069)
S1 = Momentary on-switch


Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
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Old 7th October 2002, 09:58 PM   #6
PedroPO is offline PedroPO  Portugal
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thanks kristijan,

another simple way is to use a latching switch, but the one I've got is like pass labs X series with a momentary NO/NC microswitch, so...

I think I'll use your nice little circuit. I'll have to put another transformer...
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Old 8th October 2002, 12:05 PM   #7
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Hello,

This circuit is using momentary switch.
I used this circuit on my amps, and it is working ok.

The circuit diagram should be like this :


Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
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Old 8th October 2002, 12:11 PM   #8
PedroPO is offline PedroPO  Portugal
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thanks Kristijan, I figured that out.

Do you have a PCB design for that?

I guess I'll make one in 1/2 hour, but if you've got one allready and don't mind sharing, I'll apreciate
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Old 8th October 2002, 02:07 PM   #9
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Hello PedroPO,

Here is the PCB that I made.
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Old 8th October 2002, 02:10 PM   #10
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!!?
I posted wrong picture.
Here is the right one:

Regards,
Kristijan
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