Hi everyone,
I am currently trying out a bunch of soft latching power switches, as I would like a push-on-hold-off mechanism, where holding a momentary pushbutton for about 2 seconds latches the circuit off, and a short press turns it on.
I have tried the types of circuit that are designed to be used with a microcontroller / Arduino, which work very well, specifically this one and this one, and now I am curious to try a switch that does not require a micro controller to turn the circuit off!
I tried EEV blog’s switch here however the oscillation I experienced from this circuit is slightly too buggy for me to implement as the circuit turns on again quickly after holding it off. Some of the comments on this video refer to oscillation being an issue and I couldn't find a fix for it without removing the hold-for-off 'feature'.
I have also come across Mosaic Industries’ circuit here, however I am looking for something with less complicated components (eg. simple through hole components like P and N channel fets and schotty or rectifier diodes, rather than smd chips and so on...)
My input voltage is 4.5v (3xAAA batteries). I was wondering if anyone had experience with these circuits and could point me in the right direction? Are these circuits when standalone generally quite difficult to achieve in a simple way when compared to a microcontroller-enabled one?
Thanks for reading this far!
Alice
I am currently trying out a bunch of soft latching power switches, as I would like a push-on-hold-off mechanism, where holding a momentary pushbutton for about 2 seconds latches the circuit off, and a short press turns it on.
I have tried the types of circuit that are designed to be used with a microcontroller / Arduino, which work very well, specifically this one and this one, and now I am curious to try a switch that does not require a micro controller to turn the circuit off!
I tried EEV blog’s switch here however the oscillation I experienced from this circuit is slightly too buggy for me to implement as the circuit turns on again quickly after holding it off. Some of the comments on this video refer to oscillation being an issue and I couldn't find a fix for it without removing the hold-for-off 'feature'.
I have also come across Mosaic Industries’ circuit here, however I am looking for something with less complicated components (eg. simple through hole components like P and N channel fets and schotty or rectifier diodes, rather than smd chips and so on...)
My input voltage is 4.5v (3xAAA batteries). I was wondering if anyone had experience with these circuits and could point me in the right direction? Are these circuits when standalone generally quite difficult to achieve in a simple way when compared to a microcontroller-enabled one?
Thanks for reading this far!
Alice