There is many a comment on these here pages along the lines of “Why did you use a microcontroller, when you could just have easily used a 555 timer!” And, yes, we sometimes agree with t… ...

The logic-low signal forces the 74LS02 NOR gate’s output high, which provides enough power to operate to the 555 timer circuit. The timer triggers on power-up. Capacitor C 2 holds the trigger signal ...

When it comes to the venerable 555 timer, ... I use 74HC04's and 74C14's but not 555's. I've used ECL fast logic, ... Kind of like a logic gate, ...

It uses the inherent setup delays of logic elements to provide an input-trigger lockout facility for the 555 timer. ... The setup delay of the LS series gates is around 10 ns.

Reliable 555 timer doesn’t falsely trigger Powering the timer from a NOR gate keeps it unpowered until needed. Power an LED driver using off-the-shelf components Drive LEDs with a 555 timer and two ...

As it turns out, the ever-useful 555 timer chip does the job admirably. It’s a simple enough circuit, ... There are MOSFETs with logic level gates.