Just incase of an apocalypse!
AlbertHall Joined Jun 4, 2014 12,345 Aug 7, 2019 #2 Looks a bit dodgy if trigger is low and threshold is high though. And someone has stolen the reset pin.
Looks a bit dodgy if trigger is low and threshold is high though. And someone has stolen the reset pin.
I Thread Starter iimagine Joined Dec 20, 2010 511 Aug 7, 2019 #3 AlbertHall said: And someone has stolen the reset pin. Click to expand... Oops! I guess that will make it a dozen bjts I was hoping to reduce more components, just making it a basic timer, but it seems this is it. Attachments Discrete 555.asc 3.5 KB Views: 1
AlbertHall said: And someone has stolen the reset pin. Click to expand... Oops! I guess that will make it a dozen bjts I was hoping to reduce more components, just making it a basic timer, but it seems this is it.
I Thread Starter iimagine Joined Dec 20, 2010 511 Aug 7, 2019 #4 I made a mistake, the emitter of Q12 should be connected to the base of Q6 instead
I Thread Starter iimagine Joined Dec 20, 2010 511 Aug 7, 2019 #6 SLK001 said: What is the best duty cycle you achieve? Click to expand... R9 = 1Meg R10 = 100k C2 = 100nF NOTE: R10 can not be lower then R9. So duty cycle only works from 50% on. Last edited: Aug 7, 2019
SLK001 said: What is the best duty cycle you achieve? Click to expand... R9 = 1Meg R10 = 100k C2 = 100nF NOTE: R10 can not be lower then R9. So duty cycle only works from 50% on.