d123
Advanced Member level 5
Hi,
Breaking no new ground with this one. Another member's thread about a latching off-delay circuit for a relay got me thinking about latching BJT or MOSFET circuits...
I've seen a nice-looking single pushbutton one that only uses an NMOS and a PMOS to latch on and off instantly and I know there are plenty of similar variations on this theme...
Anyway, messing around this afternoon, I came up with this non-contribution to the advancement of humankind:
I was flummoxed as to how to add an off-delay to this circuit limiting myself to just using a capacitor and a resistor, and another BJT, diode, etc. if need be.
The question really is just 'academic', I'm unlikely to ever make this, I assume.., but never say never, so purely along the lines of oompa loompa doompety doo, I've got a perfect puzzle for you - what could be done to add an off-delay to this circuit using only basic components (no timer ICs, etc.)?
Thanks.
Breaking no new ground with this one. Another member's thread about a latching off-delay circuit for a relay got me thinking about latching BJT or MOSFET circuits...
I've seen a nice-looking single pushbutton one that only uses an NMOS and a PMOS to latch on and off instantly and I know there are plenty of similar variations on this theme...
Anyway, messing around this afternoon, I came up with this non-contribution to the advancement of humankind:
I was flummoxed as to how to add an off-delay to this circuit limiting myself to just using a capacitor and a resistor, and another BJT, diode, etc. if need be.
The question really is just 'academic', I'm unlikely to ever make this, I assume.., but never say never, so purely along the lines of oompa loompa doompety doo, I've got a perfect puzzle for you - what could be done to add an off-delay to this circuit using only basic components (no timer ICs, etc.)?
Thanks.