I got this bipolar NPN latch working but I would like to get it
working with 2N7000 FET's. 12 volts supply.

So far no luck.

Of course both resets are not down at the same time.

Note the blinking red LED's in the mp4.

Paul Lamar

Paul,

Would it be easier to use CD4011, a CMOS Nand gate to implement an SR
latch? TI has a part and it can work up to 20V. Take the output of the
first nand and connect it to the first input of the second nand.
Connect the output of the second nand to the first input of the first
nand.

The 2nd input of both nand gates are your SR control signals. Use a 12
V supply and you have 12 volt swing.

No resistors, very little soldering. Easy to wire.

Henry Nee

Yes it would or even a quad RS latch. PCB space is limited.
I don't have room for it.

The bi polar NPN latch is working fine.

Paul Lamar

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