I have never been good at following the common path.....both on purpose and not....this time not on purpose...but I'll see if I can muddle through it
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I have never been good at following the common path.....both on purpose and not....this time not on purpose...but I'll see if I can muddle through it
I went to Walgreens and walked out with 47 cameras! The mother load!
I have been trying to get this to work, but it's way too high! The wires disappear..
Having read that 75 v is a better range, I have modified mine by using a resistor on the primary side of the step up transformer. I haven't found the right resistance. I have a box of jumped resistors, and have gotten close. It is charging at about 100 volts.
I'll give more details, if I can get the magic 75 v.
I wonder if the dip switches in the Greek product is turning on different resistors, to modify the output voltage?
I have been trying to get this to work, but it's way too high! The wires disappear..
Having read that 75 v is a better range, I have modified mine by using a resistor on the primary side of the step up transformer. I haven't found the right resistance. I have a box of jumped resistors, and have gotten close. It is charging at about 100 volts.
I'll give more details, if I can get the magic 75 v.
I wonder if the dip switches in the Greek product is turning on different resistors, to modify the output voltage?
It's from a big boy flash for an old 35mm slr type camera (my grandparents ages ago)....I remembered my son had been playing with it and couldn't get the flash to work. When I took it apart I noticed that there was some corrosion inside around one of the battery connections.
One of the cameras I got had a board similar to this. Similar minimal markings with the big momentary switch. It's too big to fit in the project box I have though.
here is the other side
Yeah its big....and like a dumba$$ I took it apart before testing it....and it doesn't seem to be working...it came apart really easy so im pretty sure I didn't damage anything???
I have asked breaktru what he thinks about this big sob
Bap, that should work - I want to try an even larger cap (and no, I don't mean physically larger)! The larger sizes would slow the charging rate, and if coupled with a resistor, could charge even slower, allowing more time to get to the 75V range without blowing past it and having to discharge. The trick with the resistor in the primary sounds kinda good; but not sure if it might effect the oscillation eventually. The correct way to knock down the voltage would be to remove windings - a little tough to do, though.
why the resistor when you can control the charge with the button?
Different circuitry in the Tsfa
The DIP switches in the original were most likely used for resistors, but they were used to vary a DC-DC boost converter - thast was what he was using to charge the cap. If I remember correctly, he was using a 1000µF - 2000µF cap and the voltages were around 28 - 40 volts DC.
I might just go grab a fuji (and test it before tearing it apart) and then just take the cap off the kodak
Update on my little rig. I can't get the silver to stick tonight. I just used one of the AAs that came in one of the cameras. Wonder if it's getting weak or something. It was working beautifully yesterday. Sounds pretty much the same when it winds up. Hmmm. Guess it's time to hook up the DMM.
Breaktru, after you added the additional capacitance to your original, what was the range of voltages needed for welding various types of wire? I know that you were using around 75V for silver, but what about other gages and such? At one time you were up to about 165V.
The overall voltage required must have gone down due to the greater charge stored by the larger capacitance.
The overall voltage required must have gone down due to the greater charge stored by the larger capacitance.
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Subscribed. When I get my GG atty im going to need this! Thanks for those who put in the work to make this project possible.
I have 70 volts from putting a 6.66 ohm resistor in the primary coil. To get 6.6, I used 3x10 parallel, serial to another 3x10 ohms...
Getting closer...
Getting closer...
Here is the step converter I just picked up LM2577 3A DC Step Up Adjustable Breadboard Module Power Supply Converter USA | eBay
Since I already had the rest of the stuff for the other build, and the camera was free.....
Since I already had the rest of the stuff for the other build, and the camera was free.....
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