01-01-2012, 05:28 PM
That surprises me, Alan. I used the 555 timer chip many times for school GCSE projects - hundreds, probably, over a 20-odd year period - timers, tone generators, keyboards, light sensitive switches, that kind of thing - alongside TTL and CMOS chips - plus using one in my own design of signal injector/tracer. Admittedly perfection was never a requirement with any of the school projects nor for that matter was it with the injector, but for simplicity and versatility the chip is hard to beat. What were you attempting to use the 555 for that demanded stability it could not provide?
-Tony
-Tony
