Running Lights with CD4017
2021-10-11
The 555 Astable generates a clock for this circuit, an oscillator giving a square wave output at pin 3 which is counted by 4017 to give a running lights effect.Read More
OR gate with two 555
2021-04-17
This shows how to OR gate two 555, when one 555 cycles at a low frequency a valve turns on an off, the second 555 stretches the ON duration ofRead More
Up-Down counter-timer
2020-10-12
(A question answer thread of delabs.net, nearly a decade old) Presettable Up-Down counter-timer I am looking for a schematic for a pre settable Up/Down counter that I can build forRead More
Presettable Up-Down Counter Timer
2020-07-17
When i had put the near Obsolete digital circuits online in the late nineties. One person who works in a public institution in the usa, wanted a modification of oneRead More
Sequential Timer Design
2019-06-25
I’m working on a small electronics project but don’t know too much about designing circuits so I figure I would ask someone who knows and this seems like the place.Read More
Timer and Counter for RTD System
2019-06-24
Thank you for your assistance. My answers are by your questions. Hope this helps. This unit is more for troubleshooting a air flow problem. If the counter shows many 130Read More
Temperature with Timer Triggers Counter
2019-06-21
I’m looking at an idea for a circuit design; The idea is to sense a temp of 130 degrees and then light an LED and start a timer delay. TheRead More
Astable Multivibrator with 555 Timer
2018-01-13
This is a demo of the popular 555 timer. you can try out the project on this page by a javascript simulation. Press the Red button below to turn onRead More
