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  1. steven2

    high voltage photo flash capacitor charger

    here is the circuit that i biult this from and it dosent include the , resister devider and any modifications but if you study it right by the pictures and details ive given you can get it right
  2. steven2

    high voltage photo flash capacitor charger

    :)the 12 volts relay coil has a 240 ohms resistance and its 12 volts, ill add the circuit soon as i have to get off line for half an hour
  3. steven2

    high voltage photo flash capacitor charger

    thankyou audio  guru ill get to it as soon as can be , just got out of bed  the relay is 12 volts ill have to measure its resistance  and the resisters well the pot is 1m and the first resister after that is 1m and the last 3 resisters are 1.8m each so all these timeing resisters  are on the...
  4. steven2

    high voltage photo flash capacitor charger

    :)by the use of the 1m potentiometer i get an extra 15 seconds of capacitor chargeing before the time runs out and the relay turns off the whole circuit. if i set it for 50 seconds chargeing and set the pot to full i get 65 seconds of chargeing.  without this circuit you may be able to modify it...
  5. steven2

    high voltage photo flash capacitor charger

    :)
  6. steven2

    high voltage photo flash capacitor charger

    :)the 2 diodes allready on the board are only 1n4148 diodes and so ill still add a rectifier diode to the relay inputs for the reverse voltage protection
  7. steven2

    high voltage photo flash capacitor charger

    the latest high  voltage capacitor charger under construction  is an ignition coil version includeing the capacitor thats 4700uf 250vdc and an scr fireing circuit so when its charged the light will come on  then with the push of a button the charge will be dumped iether into my mini coilgun or...
  8. steven2

    sensitive parabolic michrophone

    hello audio guru you should of posted  this circuit agers ago to my topic seeking sensitive parabolic mic circuit , it may of been handy but anyhow i got it now so ill biuld it to  if its any thing similiar to the last one
  9. steven2

    Charging a Capacitor

    go to the high voltage stuff section , in electronics lab look at topic high voltage photo flash capacitor charger, now if you want to charge up a pphoto flash cap and shock someone , it may be to dangerous  but  if its gona be picked up with one hand only  then all you need is a strip of foil...
  10. steven2

    Simple N channel mosfet tester

    to speed up the n channel mosfet testing, change the electro to a 2.2uf 100 volts electro
  11. steven2

    SCR tester

    if you dont have a 10 volts dc 300 ma power supply for the scr tester you can use 12 volts 250 milliamps power supply. if you use 12 volts and more than 1 amp the c1066 scr i tested burnt out from to much current and the realy started flashing without the use of the push button so if the relay...
  12. steven2

    key chain laser power supply

    :)audio guru  welcome back well at first i measured the voltage of the keychain laser button cells which i think i mentioned how much voltage it was before  but because they are used batteries the figure may not be acurate so i used the 5 volts regulater powerd by the 9 volts battery that was...
  13. steven2

    key chain laser power supply

    :)
  14. steven2

    key chain laser power supply

    :)
  15. steven2

    key chain laser power supply

    here is the printed circuit board version i biult today , first theres the keychain lazer power supply, and allso the receaver unit, in the picture of the receaver unit the 100k pot is outside the picture so youll know its there now ,that circuit has 2x 9 volts battery  one is for the actual...
  16. steven2

    Capacitor circuit design...

    :)or look at the topic in the high voltage stuff section , topic high voltage photo flash capacitor charger, theres allso an ignition coil version there to and they even charge up non photo flash caps to , as for the emp stuff look through the forums here for mini emp box schematics or circuits...
  17. steven2

    Transistor Tester

    a 1uf 50 volts capacitor will be ok , as for the resister  50k use 5x 10 k resisters in sieries to make up 50k  or 2x 20k and 1x 10k to make up 50k, 56k may be to high it may pay to stick to the value in the circuit or within the tolerance range of that resister, like 5%
  18. steven2

    credit to electronics lab

    ill hold my glass up for the brains behind electronics lab any time , this is the best site on the net ,  16009 membvers so far and climbing
  19. steven2

    Flyback driver experiments

    intresting
  20. steven2

    Flyback driver experiments

    we have small flouro bulbs to that can take the place of the tungston globes
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