schematic needed

[p.larner]

i want to build an oscillator to drive a small transformer that will output ac,the output of the transformer only needs to be a few ma at say 24v max,powered from an 18650,any ideas?.its to build a small octopuss component tester to work with a handheld scope in xy mode,the idea is basicaly have a small portable huntron tracker.

[Terry Bites]

4000 series cmos will work happily down to 3V.
Paralleling gates gives plenty of output drive for your mosfets or transistors.

[Roehrenonkel]

Hi Terry,

sorry to contradict you, but a square-wave will not do for a component-tester.
Sine- or triangle-wave is needed (imho).
 
Best regards

[p.larner]

thats what i thought,a square wave will smack a transistor or diode junction on or off,not turn it on in a linear manor to display properly on a iv tester?,is that right?.

[Kim Christensen]

I assume the amplitude and frequency isn't super critical:
You could LPF a 50/60Hz square-wave or triangle-wave (to turn it into a pseudo sinewave) and feed that into an audio amplifier IC to drive a small step up transformer. (Low voltage mains transformer in reverse)
Or feed the AF amp from a phase shift oscillator running at 50/60Hz.