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  1. Hero999

    LED project. :(

    Regulated DC power supplies can be purchased pretty cheaply so are probably the most trouble free option. I'd recommend a 5V PSU because it will be regulated as 5V logic circuits require a nice stable supply. Do you have a picture of the power supply or a link to a website which sells it? I...
  2. Hero999

    e2u10

    Ask the manufacturer for a schematic or at least the part number of the IC. They should be able to supply it for you but it'll probably be cheaper going elsewhere.
  3. Hero999

    Circuit board from E-11 Hasbro toy blaster.

    The circuit is much more complicated than it may seem. The little black blob of plastic on the PCB hides an integrated circuit containing 1000s of transistors. You need to design a circuit which simulates closing the switch and releases it before it makes the ricochet sound, a  555 timer would...
  4. Hero999

    LED project. :(

    You need a DC power supply which can be bought from most electronic shops such as Maplin or RadioShack. The LEDs need a resistor connected in series to limit the current otherwise they'll overheat. You're better off connecting many LEDs in series and then connecting each series string in...
  5. Hero999

    hv transformer wiring

    That will work fine.
  6. Hero999

    hv transformer wiring

    How can one wire be + and the other - when it's AC? The winding doesn't need to be grounded. You're right, the ratio will be 1:13 because it's the ratio of primary to secondary voltage, there's no need to measure it. Although you'lll probably fry the meter trying to measure 3kV, the...
  7. Hero999

    solar lights through fiber optics help T.T

    I don't think fibre optics are suitable, you need light pipes which are literally pipes lined with a reflective material. It should be pretty straightforward to hook up some solar panels and lights to a battery but you need to calculate charge, usage and the amount of daylight available. If you...
  8. Hero999

    Alot of questions for an easy piezo project!

    We have a no duplicate thread policy here so I've cut out the part describing what you want, moved it to this thread and replaced it with a link in your other post. The formula for calculating the resistor and capacitor values can be found on the datasheet and there are also plenty of online...
  9. Hero999

    hv transformer wiring

    That looks fine to me. he red wires are the secondary and the brown and blue are the primary.
  10. Hero999

    Alot of questions for an easy piezo project!

    You need a monostable circuit. The modes are as follows: Astable, a circuit which always has an unstable (i.e. changing) output; an oscillator such as an LED flasher. Bistable, a circuit with two stable output conditions: push one switch to turn on and another to turn off. A typical...
  11. Hero999

    Dual Tracking Supply Design Not Working as Expected

    It sounds like a grounding problem to me. You said that you fed this circuit from 36VDC floating. What you need to do is feed the circuit from +/-18VDC referenced to 0V.
  12. Hero999

    Too many SPAMMERS here

    I don't know ask mixos? I've just check the bin, 300 threads by the same spammer! To be honest I wouldn't have bothered to delete them even if I saw them - I do have a life away from moderating this forum. There should be a limit on posting, perhaps 10 threads per day, three consecutive posts...
  13. Hero999

    LCD MONITOR

    That's because most LCD monitors don't need any drivers, for example my monitor will work with my BIOS set up program which doesn't have a driver or rely on any operating system.
  14. Hero999

    home automation

    Use a PLC - they're designed for that kind of thing.
  15. Hero999

    undervoltage simulation

    I don't know what your schematic looks like so I can't help you.
  16. Hero999

    Reading and writing an EEPROM through a PC printer or serial port

    I've already told you via private message: DON'T POST THE SAME THING MORE THAN ONCE, it's treated as spamming and does not increase your chance of a helpful response. This is your FINAL WARNING, do it again and you'll get banned. MODERATOR.
  17. Hero999

    undervoltage simulation

    An undervoltage cicuit should do the reverse of that. Post the schematic.
  18. Hero999

    UPS (uninterruptable power supply) battery extension

    I'm not sure what you want to do. Thermoelectric generators are less efficient than traditional heat engines such as a petrol, diesel reciprocating engine or a gas turbine. The most efficient battery technology is lithium ion but it has many shortcomings: charging is complicated and has safety...
  19. Hero999

    undervoltage simulation

    Please provide more information, there are many different ways to provide undervoltage protection.
  20. Hero999

    My own PSU-PCB (30 VDC / 0.002-3 A PSU REV2) [WIP]

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