How to create pulsed DC?

[fritz]

Another idea - just for basic testing could be a self-switched relay.
just put the coil in series with an opener switch of the relay, put a
capacitor - some uf in parallel to the coil and feed power via some
ohm series resistor. By tuning the input voltage you get a nice
multivibrator which can handle lots of voltage and power on the
remaining switch of the relay.
This works up to some hundred Hz - yes - the relay will die some day.


rgds.

[z.monkey]

Howdy jadaro2600, and Fritz,

jadaro2600, what are you using for a driver?

Fritz, just found this circuit recently.  Apparently its really old, doesn't get used much anymore...

Blessed Be Brothers and Sisters...

[jadaro2600]

Well, for ease of use, i've got a hobby transformer normally used to power a train set.  It's rated at 17 vdc / 20 vac with 7va total output.

[pese]

Howdy Y'all,

Take a look at this.

http://www.aaroncake.net/circuits/inverter.asp

I built this circuit to pulse one of my transformers.  It's a neat little circuit and may be good for an HHO application...

Blessed Be Brothers and Sisters...

Error in Circuit.
The Cap?s C1 C2 are designed in the wrong polarity, can blow up and not work.
This design is since years wrong in the WEB. Pleas revers the Polrity. + to Collector  and negative side to the base
(gate) of transistor.

Pese

[fritz]

hehe,

Couldnt describe it better;-))))
Now you know what I do if Im very idle in my lab,
no crazy noise, only some relays.
I cannot throw them away until they?re _DONE_

really like this circuit.
You can even make unsymmetric operation if you add
a diode - or use the open end of the self opening switch
to shorten the coil thru a different additional resistor.

You even can shorten the remaining lifetime if you switch
additional coils ..... but thats really off-topic now.