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  1. Hero999

    accelerometer

    Please post in English.
  2. Hero999

    cordless charger redesign 110v to 230v

    It's a bad idea because the PCB and transformer creapage and clearances will be designed for 110V and might not be adequate for 240V. It also might create stability problems in the controller IC because the duty cycle will be lower than what it was initially designed for. The six pin IC is...
  3. Hero999

    Help with designing mutli relay/trigger game machine

    Why not simply buy an old pinball machine and use the components to build your project?
  4. Hero999

    Logic and Switching Circuits

    Please post in English.
  5. Hero999

    direct connect dvd or cd ROM to TV

    It's not possible without a processor to decode the information on the DVD and pass it to the TV. The cheapest processor is a PC.
  6. Hero999

    reshaping a signal

    What's the amplitude of the input waveform? This can probably be done with an LM393 or a CMOS IC such as the 74HC04 or CD4069.
  7. Hero999

    WANTED ELECTRONIC ENGINEER - to construct circuit - turn on and off a LED light

    What do you want? There's no need for a PCB, an LED wired in series with a suitable resistor and a switch will do.
  8. Hero999

    Help with designing mutli relay/trigger game machine

    That's something no one on a forum can teach you. You have to research that and learn it interdependently. Here's a few links to tutorials: http://www.gooligum.com.au/tut_baseline.html http://www.winpicprog.co.uk/pic_tutorial.htm http://www.mstracey.btinternet.co.uk/pictutorial/picmain.htm I...
  9. Hero999

    inverter

    Why not design one yourself? No one's going to do ir for you, that's not what forums like these are for. Plenty of inverter schematics can be found using Google.
  10. Hero999

    Help with designing mutli relay/trigger game machine

    Either of those will do but one of them requires a PC. What processor are you using?
  11. Hero999

    inverter

    You buy an inverter from your local electronics store, here's a link to one: http://www.maplin.co.uk/600w-dc-12v-to-ac-230v-power-invertor-48724
  12. Hero999

    Help with designing mutli relay/trigger game machine

    Don't ask for people to contact you in private, it defeats the purpose of a forum. Do you have a schematic for the PCB? Does the money box have an output giving the number of credits? If not then you can't do what you want, you need a coin slot which counts the coins and feeds the output to...
  13. Hero999

    PWM Without PWM IC

    No because the LM324 won't work at 47kHz.
  14. Hero999

    what is fermi level and....

    That's because it's spam.
  15. Hero999

    Patulong nmn po ..Thesis project..

    If you want help, please post in English.
  16. Hero999

    hi...im newbie here...

    If you want help, please post in English.
  17. Hero999

    What is this Capacitor Between Hot and Cold Chassis for?

    They're for RF suppression. Notice how the capacitor and resistors are connected from the 0V of the low voltage DC rail to the high voltage rail? The capacitors divert any high frequency signal which has leaked across the transformer's interwinding capacitance back to the mains. The resistors...
  18. Hero999

    Ordinary carbon paper instead of TRF Green

    Don't worry too much about the residue, just soak it in water and remove as much as possible by soaking it in water and rubbing it very genitally. Paper lets the etchant through so, it just takes a little longer. If you're worried because there are bits of paper stuck in critical places i.e...
  19. Hero999

    Ordinary carbon paper instead of TRF Green

    If you're struggling with magazine paper then by all means give it a go. I know that the type of toner is a factor, perhaps Pulsar have a point about some manufactures of toner but they generalised too much: the toner I use works perfectly. It's probably worth a go, before giving up and using...
  20. Hero999

    Variable supply using LM317 with 32Vrms transformer rating

    Then it looks like you're stuck with having to throw away large amounts of power. Here's  circuit which shows you how to bias the LM317 to 0V with an op-amp. It's better than the circuit shown on the datasheet because the tolerance of the LM317 is taken into account. Unfortunately it does use...
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