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an unusual latch - high pulse makes output go low or high

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uglyboy

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AN UNUSUAL LATCH

I would like some help please,
I am new to logic based electronics and I am trying to build a circuit that behaves like a latch but what I need is for the latch to make the output go high when I apply a short high pulse to the input and the second time I apply the same short high pulse to the input I need the output to go low.
I have tried building a complimentary latch with transistors but can't unlatch it with the same input pulse, I have been looking at using nor and nand gates but can't figure out the combination to use to get the desired results.

I have 4001s,4011s,4013s,4060s, 555 timers NPNs & PNPs in my bits box.
 

Colbhaidh

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Re: AN UNUSUAL LATCH

Use the 4013 D type latch

87_1249288910.jpg
 

uglyboy

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Re: AN UNUSUAL LATCH

Thanks for your reply, I give that a wee go :D
 

nandhu015

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AN UNUSUAL LATCH

Hai uglyboy

I dont you try a latching relay?
A short pulse will make it to stay on one side, and another short pulse of the reverse will make it stay on the other side.

Regards
Nandhu
 

uglyboy

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Re: AN UNUSUAL LATCH

Hi nandhu015,

I wanted to keep my circuit solid state,
I am using the D type latch that Colbhaidh suggested,
It seems to be working fine,

Thanks again to both of you.
 

akshay_d_2006

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AN UNUSUAL LATCH

Hie uglyBoy,

You can even use a Bistable Multivibrator. Its a good Idea to use it in terms of understanding electronics its a good Application of IC 555 too. Learn it from somewhere, if cant let me know i will give you a good idea about it.

In a bistable multivibrator youhave 2 stable states (1 and 0) and can be used one after another by applying a short impulse whose width can be decised by you.
 

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