Ωmega Machine - My gift to the world.

[Yucca]

This is my initial protoboard attempt at the circuit:

caps:
200V 470uF

diodes:
1n4007

resistors:
940 ohm
each one made from 2 x 470 ohm

relays:
24V coil 1.5 kohm DC res
125V 10A contact rating


I built the two oscillator stages side by side. I didn't use the 9V battery method to precharge the caps to 200V. Instead I precharged them both to 80V with external supply and set the machine going. When running it decays to no oscillation in ~6.5 seconds.

One oscillator stage on its own with the feedback disconnected decays in ~8 seconds?

I may try precharging my caps up to 200V using a rectified variac but I will have to increase the coil feed resistance, my relays already sounded like they were about to expire at 80V.

Note:
Whilst running it sounds like the gates of hell are slowly creaking open!

Yucca.

[hartiberlin]

Many thanks Yucca for these first tests.

Do you also have faster diodes like 1N5408 or BYT types diodes ?
The 1N4007
are too slow to catch all the high frequency spark pulses..
So better use only very fast diodes for these types of pulse circuits.

Also it could be very helpful to modify the relays and have copper
on graphite contact points.
Just try to rip the graphite out of a pencil and modify the relays with it,
so the spark is burning between the copper contacts and the pencil graphite
contacts.

Many thanks.

[ramset]

Since Stephans last post ,something I have been thinking of for a while. I made a gold [and other metals] brushplating machine. Do you think gold plating would increase the life of these relays?
PS Would be very cheap to do
Chet

[NightBlade]

@Yucca
Based on my simulations you need a starting voltage of about 200{primary} and 200-400{secondary} to get over the resistance needed to prevent immediate discharge of the caps. I'm worried your caps would explode if it caught. You can make some HV caps from glass jars lined with tinfoil. Should work for most loads. You should have a selfdischarge switch incase the voltage goes too high. Good luck.

[NightBlade]

reposting circuits