Hi everyone,
I'm looking for a component that would have three leads, is a switch in nature, and acts ultimately like a thyristor EXCEPT one electrical pulse (at the 'gate') would turn the switch 'on' (followed by a period of no electrical activity) and a further pulse (at the 'gate') would turn the switch 'off' - single pulses dictating the switch state (i.e no need for continuous current to keep switch in a certain state.) What would this component most likely be?
James
I think what I'm looking for is called a Latching Relay. There's little information available on them on the net. Anyone know how I would go about making one controlled by a pulse?
James
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Yes. Or bistable relay.
Graham
-- Imaginary. ;)
--- Only if one of the coil leads is common with one of the contacts, since he's asking for three leads.
Also, unless the toggle is mechanical, he'll have to use a positive pulse to say, SET the relay and a negative pulse to RESET it.
-- JF
a Flip-Flop? eventually followed by a MosFet, BJT or relais.
-- ciao Ban Apricale, Italy
Perhaps a stepping relay, like from an old telephone exchange, but with only two contacts, would satisfy the original request...
-- Wim Lewis , Seattle, WA, USA. PGP keyID 27F772C1
-- Yes, but they had lots of contacts on them, so there\'d need to be an even number of contacts and every other contact would have to be connected in parallel with the contacts between them left unconnected in order to get the ON-OFF-ON-OFF action. There also used to be a line of switches made by Ledex that used a rotary solenoid driving a rotary switch wafer that would work.
Mechanical or solid state? Do you have one?
-- . . . . . . . .
If that "period of no electrical activity" includes no current through the main terminals it sounds like a latching relay.
If you just mean no activity on the control (while the device is still passing main current) you're describing a GTO SCR. GTO="Gate Turn-Off"
-- Bye. Jasen
another thought: you could be descriibing an IGBT.
Bye. Jasen
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