How to create pulsed DC?

[jadaro2600]

I have a diagram on the previous page; rather than using my hobby transformer for an ac source, I used an analog stereo receiver for the source.  It puts out about 60 volts and around 1.3 amps at max volume.

Using this source and the sound card's ability to create various signals, the range is the only limiting factor.  Using Audacity, or some other electronic tone generator should / has been / my source of ac power.  IT allows square waves, and cutting the ac in half create a type of pulsed dc.

Also, adjusting the DC offset in the tone signal may have the same effect.

[triffid]

The cheapest way I know would be to use the audio output from a car radio.You already have millions of car radios out there.Of course different sounds would have different outputs.triffid

[triffid]

Think about it,the audio output from a car radio is DC at varying frequencies.It's also constant current output.Triffid

[triffid]

audio (1-20,000 hz.)Triffid

[pese]

take an speedcontrol from your screw drill

thea are normally 12 volt  (up to 18)
and normal to use up to 10 amps.

te work on about 4000hz.
and your can regulate/vary the duty-cycle
5% on up to 95% on that say : the 12V DC it is pulsed.
Pese