latch

Hi! Just for context, few months ago I wrote this post: https://forum.allaboutcircuits.com/threads/help-powering-an-mcu-when-a-switch-changes-state-with-auto-turnoff.196069/ My idea is to make an independent power latch that will monitor state changes from a reed switch (or tbf any kind of...

Hi! Been trying to practice electronics after a long time, and found this tutorial https://randomnerdtutorials.com/latching-power-switch-circuit-auto-power-off-circuit-esp32-esp8266-arduino/ on how to do a power latch which lets you turn off an MCU when its job is done. So to practice a bit...

Hi, I am a bit of a newbie with electronics but I saw a circuit for a 555 LED latch and had a go at turning a schematic into a finished vero board project. This worked well, so having seen that it has a big brother, the 556 dual timer, I tried designing and implementing another simple cicuit...

Cleaning up files and came across this little gem. I built it and it worked pretty well, but there was a gremlin I never uncovered, so I abandoned it. The need was for a dead silent fanless PC where you want to use a spinning hard drive only occasionally for backup. The idea is to set a switch...

I want to use a current sensor IC (like the AC712), but a Chinese one CC6903-10A because it works with 3.3V. There is a circuit in the ACS712 datasheet (page 12) which also appears in the CC6903 datasheet (page 5, middle/bottom right) that is meant to latch when a high current occurs. Now, Vout...

Hello, Im planning to do a very simple project but getting quite confused about where to start as I've done parts of it before but not brought everything together in one piece. Any advice on where to start would be great and I can expand my knowledge. Project Aims Simply put a box containing...

I've been designing a simple random number generator that is supposed to generate a number from 1-100 and display it using three 7-segment displays(D0, D1, D2). This design also uses a 555 timer(astable 1400Hz) and two BCD decade counters. For D0 and D1, I am using CD74HC4511E decoders, which...