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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Experimental device for mixing conductive paint.
Someone needs to put this into a RepRap print head already I tried it at long last, having come up with the idea a couple of years ago but never had enough paint to make it worthwhile as it is only useable if there is a lot of solvent in the correct sized container.
The motor is a pancake type salvaged from one of those Samsung D500 or E700 screen assemblies, as the whole assembly is changed if one part of it breaks. Talk about recycling...
My now broken voltage multiplier build with "Safety Y caps" junked from rework. :) slow exposure - wish it were that thick in real life. There is a inverter driving a IRFZ44 inverter in the back.
A tantalum cap that got blown up. I blame the discrete MOSFET driver from TI app note not switching on fast enough. What I ended up was the MOSFET switching at subharmonic resulting in cap self destructing due to high ripple current. I subsequently completed redesigned after running my own design in LTSpice.
My VDF driver PCB. It has a tiny BJT ZVS resonant driver for the filament and charge pump with a series regulator for the negative voltage. The display is driven by PMOS from a CPLD. It was fun lining the SO23 up for hand soldering. The rest of the CPLD was f100% utilized with prescaler and misc logic for a frequency counter.
This was the test program in C I wrote for driving multiplexed display and my 2nd Atmel C program. Power supply + uC PCB I made on the bread boarding.
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