Recent content by ZomBiE

  1. ZomBiE

    Dual LM3886 Bridged Amp.

    What didn't you get? with 8 ohm speaker it works just as expected.
  2. ZomBiE

    Dual LM3886 Bridged Amp.

    Like i didn't know that???
  3. ZomBiE

    High Voltage DC Power Supply (0-900 VDC)

    You're on right tracks. You should start by checking wattage that laser of yours needs, 0-900 is not neccessary. but say 100-900 would do. Transformer where output voltage rises when open, 900v is target, would easily rise above 1200v and that might create an arc between windings. I used...
  4. ZomBiE

    Commodore 64 repairing gone forgotten?

    What's wrong with people? Now i have been repairing those good old computers because seems like anyone else can't do that here in Finland... What if those original logic IC's aren't available anymore? Always there's a substitute. Well, PLA IC's might be hard to find, but almost all the others...
  5. ZomBiE

    AC signal for water level monitoring

    What? Electrolysis? You mean electrolytic corrosion? No way, it always happen. You should use some good metal rods for this, like chrome-vanadium. like scrap screwdrivers. And low sense voltage, wich is amplified for desired level for your application. And i don't see any measuring circuit, that...
  6. ZomBiE

    Dual LM3886 Bridged Amp.

    This topic went off, again. But i remembered this, and thought that i'd put those plans online. BUT: When i searched my archives, i found that this particular CD-ROM was damaged.  >:(  I built my own amp and it has worked for about 3 years now, almost 24/7. It doesn't work well on 4ohm...
  7. ZomBiE

    Dual Supply R-R Opamp

    Found one not rail-rail. http://www.national.com/pf/LM/LM675.html And another http://www.linear.com/pc/productDetail.jsp?navId=H0,C1,C1154,C1009,C1028,P1329 Single rail to rail op-amp in single package (20SO Powerpad) http://focus.ti.com/docs/prod/folders/print/opa569.html 5V supply though.
  8. ZomBiE

    Dual Supply R-R Opamp

    For what type of use? that might help a bit.
  9. ZomBiE

    RS-232 Laser Transceiver Project

    Laser tranceiver itself doesn't need any special programs. It works like an ordinary nullmodem cable. S/PDIF transmitter could be done by using only few transistors and requires no IC's. Toy laser pointers is propably the best choice for testing these projects, because those are cheap and easy...
  10. ZomBiE

    4 Cellphone chargers into 1?

    Li-ion chargers might not like parallel power, them dent to "sniff" input voltage to vary PWM cycles for proper regulation. And when theres a few PWM regulators, it may cause too much noise that will mixup error amplifiers of such chargers to undetermined state. ie. charger doesn't work like it...
  11. ZomBiE

    Autonomous Control Using Accelerometers

    We tested similar assembly in our school, and we came into conclusion that gyroscopes are the best solution for this application. Try to study a bit of inertia navigation and you understand why.
  12. ZomBiE

    Electronic latching circuit?

    there's tons of them, by single IC or via discrete components
  13. ZomBiE

    points assist igbt auto ignition

    Reverse voltage spike might be too high?
  14. ZomBiE

    Suppliers for Laser TX and RX diodes

    receiving photodiodes produces all you mentioned. But transmitter lasers, you'll have to ask matsuhita or sanyo
  15. ZomBiE

    Hi! Has anyone tried this great intercom circuit?

    20 meters. Yeah, small amount of hum, not disturbing though.
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