Other than using a 555 as a schmitt trigger... [image] I bought 5 off these off of ebay, I was looking for a simple case of, feed the analogue voltage signal in, 1v, 2v, 4v, 5v, etc, and simply have two states, high or low, so in my head I had this Voltage DC In > Voltage DC 5v High, Voltage 0v L…

Schmitt Trigger.

Grumpy_Mike November 20, 2012, 3:10pm 13

cjdelphi:
74LS81

can't find any info on it, got a datasheet?

No it's a bit old, try the 74LS89.

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