I've done that with my latest project. The issue is the 555 runs off 12, and the micro off 5.
I connected the output of the micro to the base of a mpsa42 through a 10 resistor, the emitter to ground, the collector goes to pin 4 (reset) of the 555 with another 10k resistor from this pin 4 to +12v, works fine. The only thing to remember is that the pin is a shutdown pin, ie logic zero turns on the 555 and therefore ht. This method doesnt interrupt my voltage regulation technique using pin 5, and I've even found I can drive the shutdown input with pwm at 100hz to give a brightness control. On 14 Feb, 10:37, Cobra007 <[email protected]> wrote: > Try this, it *must* work :-) > > http://xiac.com/Images/PowerSwitch.JPG > > Michel > > On Feb 14, 8:59 pm, StoopKid <[email protected]> wrote: > > > > > CTL high and RST low through 3904 give me the same results. The > > schematic with the base Q2 HIGH works less well... I appreciate your > > help, any other suggestions?- Hide quoted text - > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
