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  1. Bikerman

    New electronics hobbyist looking for good projects to start on!

    Tons of circuit online http://www.seekic.com/circuit_diagram/Electrical_Equipment_Circuit/Improved_lamp_dimmer.html http://www.seekic.com/circuit_diagram/Electrical_Equipment_Circuit/Low_cost_lamp_dimmer.html and so on Don't go and kill your self :)
  2. Bikerman

    Need a bit of help (power amplifier)

    Ahh yes, thankx - Peak power  :) Ok, but the 81VAC (600W ish 8R) still seems high to me, as it says 300W RMS 8R on the back, and the external speaker is parallel connected to the internal speaker...
  3. Bikerman

    Need a bit of help (power amplifier)

    I'm repairing a chinese amplifier for a subwoofer and don't get it The amp powers the internal speaker and you can connect (in parallel) an 8 ohm 300W sub. So I assumed that the amp would give 600W(ish) in 4 ohm, so that the marking on the bok fits (8 ohn 300W external sub) But the capacitors...
  4. Bikerman

    How electronics works

    http://www.theregister.co.uk/2005/06/20/bofh_2005_episode_19/
  5. Bikerman

    What will it do if I...?

    Nope, but it will probably give some "interesting" results  :P
  6. Bikerman

    What will it do if I...?

    Hi Ante nope no realtime clock
  7. Bikerman

    What will it do if I...?

    Just found that the 6502A runs at 2 MHz - but I don't know if it is with a 1 or 2 MHz x-tal
  8. Bikerman

    What will it do if I...?

    Here are the schematics http://www.funet.fi/pub/cbm/schematics/computers/vic20/index.html there is a CPU running at 2 MHz you can out stright in (can't remember the name), you don't need to change the x-tal (6502DX2 ??  8)) when the VIC was hot you could buy a 4 MHz upgrade for it !!!, the...
  9. Bikerman

    What will it do if I...?

    Yes, well, 1.01 to be correct  ;D
  10. Bikerman

    What will it do if I...?

    What chip ? - the CPU ? it is the 6502
  11. Bikerman

    My VIC-20 is broken...

    Looks more like RAM (the control for it) or the char. ROM
  12. Bikerman

    What will it do if I...?

    The C64 is using a 6510  :P One of the best places (I think) for Commodore stuff is: http://www.funet.fi/pub/cbm/ Miss my VIc-20 - it has alzhimers  :'( - a known problem in old VIC's... But all my C64, spectrum, lambda, amiga, spectra video, sort, amstrad, new brain..... still works  8)
  13. Bikerman

    How to Design A Solar Tracker?

    Try looking at these http://pages.prodigy.net/rich_demartile/ something like that ?
  14. Bikerman

    Switching power supply

    Yeah, been busy (got married and stuff) :P on the last page of this post (page 3), there is a .pdf file called SMPS_POWER.pdf - with alot of examples of switchmode power supply's
  15. Bikerman

    Switching power supply

    Hello I am on the lookout for a 12V 3,33A powersupply (for a TFT monitor), the one on page 54 looks almost simple, and it gives 3,5A 15V but that can probably ber changed easy. But what about the T1, there is no description of that? - or have I just missed it another question is, if the TFT...
  16. Bikerman

    ultrasonic mosquitoes repeller

    Just saw this one: http://members.shaw.ca/novotill/UltrasonicPestRepeller/index.htm I tried ultrasound through a piezo speaker, it did produce the 40 KHz I insertet but along with dosent other frequency's alot of them under 15KHz ;D Come to think of it, I once saw a program for your PC they...
  17. Bikerman

    PSU 0-60Volts

    Ante Nothing, need a +/- supply
  18. Bikerman

    PSU 0-60Volts

    Ante Well, What would I need 10A for anyway ;D
  19. Bikerman

    PSU 0-60Volts

    Hmmm, nope How about both? ;D hmmm, do you know if the dual 0-50V can run as a 0-50V 10A and 0-100V 0-5A ? (serie and parallel connected) ???
  20. Bikerman

    PSU 0-60Volts

    Ante hmm, I think thet the MJE4502 and the MJ4502 is the same... the ones I have is the MJ4502.. - atleast I'm probably gonna use them and see what happens.... I don't think that using the TO220 LM317 in stead of the TO3 is gonna be a problem...it shouldn't get that hot....
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