Relay switches

[harry bissell]

Aromat DS2Y dual coil latching, Omron has similar... (G6 series??) low voltage
5-12V coils available. Price about $3 (USA)  DIP Package.

:^) Harry

Martin Czech wrote:

> :::I need some advice on making small relay switch (12V),
> :::I know of basics but if anyone messed with this things,
> :::can you tell me of some good designs, I need it in pedal
> :::effect. Instead that DPDT stomp switch, I want to use
> :::taster to switch some flip-flop and relay.
> :::Thanks!
> :::
>
> I suppose you want a toggle switch.  Therefore you would need a toggle
> FF and a reed relay, they are very small (some look like a DIP), and
> very reliable. If you want a defined state @ power on, you also need a
> PON reset circuitry.
>
> A function generator I build uses toggle FF for all settings, but they
> tryed to avoid debouncing RS-FF with some capacitor circuit.  This works
> somehow, but not always. Debouncing is a must.
>
> Some CD40xx circuits come as single gates in SMD packages.
>
> I think this could be build in a very small volume.
>
> But: such a relay needs current (~10mA) for the "on" position.  This is
> not so good for battery powered applications.
>
> There are bistable relays which toggle mechanically if a current pulse
> arrives. But so far I have not seen such a device for lower voltages
> and low volume. They are often made for power applications, quite large.
> You know, the type of device to turn on the staircase light for all floors...
>
> Maybe there are low voltage versions.
>
> So, for low power, better use a CMOS switch CD 40xx or better.
> Lowest power: real toggle switch.
> Low power & floating potential: mechanical toggle relay.
>
> m.c.