Tagged Questions

-1
votes
2answers
1k views

Creating 1 hour delay with 89C51 micro controller

I am writing an Assembly Program function for 89C51 which can create one hour delay. I can't use any other micro controller as only 89c51/52 is available locally. So I am stuck here because even when ...
4
votes
4answers
788 views

Maximum attainable delay with Micro controller

I am designing a microcontroller based delay circuit to implement delays of 2 hours, 1 hour, 45 minutes, and 30 minutes. The circuit will automatically turn on off a relay after this time period has ...
3
votes
4answers
336 views

Delayed power supply startup

I would like to make a circuit that turns on a power supply to a microcontroller after holding down a button for a period of time (say 2 seconds). To make matters slightly more complicated, if ...