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Author Topic: Two-Bit Relay Counter  (Read 4577 times)

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Offline German_EETopic starter

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Two-Bit Relay Counter
« on: October 25, 2015, 01:59:10 pm »
Strange things can happen when you are surfing around on the internet. I was looking for a design of relay flip flop and I came across this circuit:

http://www.emil.matei.ro/img/onof2a.png

Not only can this circuit divide by two using only two relays but, if you look at the state diagram on the right, it's a two-bit binary counter using only two relays. OK, the count is in the wrong order, but it can still be used by swapping the lines around after decoding.
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Offline amyk

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Re: Two-Bit Relay Counter
« Reply #1 on: October 25, 2015, 02:29:08 pm »
PB1 pressed.
d1 coil energised.
d1.1 and d1.2 closes.
d2 coil energised.
d2.2 and d2.1 switch
d1 coil deenergised (same potential on both ends)
d1.1 and d1.2 opens.

Looks more like a pulse generator to me.
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Offline eetech00

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Re: Two-Bit Relay Counter
« Reply #2 on: October 25, 2015, 06:10:08 pm »
Hi

Here is a relay Flip Flop circuit.
It uses a center off switch.
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