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Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
I needed a birthday present for my sweetheart, so I decided that a new desk toy was in order
To keep things nonletal and simple, I decided to build on TDUs Candybox HV and use a camera charger (sans pcb, just the transformer, transistor, startup resistor and rectifier diode) to charge up a 6uf/450v cap (2x 3uf/450v in parallel) which is shorted into a 5 turn primary on a flybakck transformer using a 220v SIDAC.
Shrinking the charger circuit and adding the storage caps/SIDAC:
Add some power and a transformer, then start to build it into a box I built out of some leftover hardwood floring
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
That looks pretty cool, especially with the two bare wires sticking from it... I bet everyone would guess what does it do even without applying the power!
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
Of course she liked it, although the first thing she wanted to do with it after she saw it was set something on fire with it
I was considering a sgtc/sstc, but decided that the simpler the better, since she is heading off to college (Notre Dame, Indiana) in a few months, so I am not going to be able to mess with it if it gets out of tune.
Registered Member #1316
Joined: Thu Feb 14 2008, 03:35AM
Location: Cambridge, MA
Posts: 365
Was the fly back a trigger coil? Could you direct me to a site that explains how to simplify the flash cameras, i have been planing to make something like this for months now.
Registered Member #1107
Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
the flyback is being used as a pulse transformer and the camera circut charges the capacitors and then the sidac discharges them into the primary coil.
Registered Member #952
Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
Weston wrote ...
Was the fly back a trigger coil? Could you direct me to a site that explains how to simplify the flash cameras, i have been planing to make something like this for months now.
There's a fine tutorial on Youtube. However, not all charger circuits are the same. That tutorial works only for particular flash boards.
Another way is to do a bit of reverse-engineering to find out which parts belong to the capacitor charger circuit. Or you may find a ready-made schematic for your board with a little googling. If you're lucky, it's just a transistor, a resistor and the transformer. Desolder the parts from the board and make your own, more compact version.
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
@weston, The charger was made by just looking at the traces on the charger pcb, and soldering the components on to their respective locations. Luckily the board I had was very simple, so it was easy to find which components were necessary.
@rp181, the caps are wires in parallel, the tvs fires at 220v so it was not necessary to have more than one series capacitor.
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HV Desk Toy
