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  1. electrodoc2

    handy tip for intefacing your PC with projects

    yes it can
  2. electrodoc2

    handy tip for intefacing your PC with projects

    Yes there is the IN command ,but i've never played with this command so i'm not sure of the syntax, i'd say it's if in 888,1 >0 then etc etc what version of windows are you running kevin?
  3. electrodoc2

    sensitive low frequency filter

    Hi i couldn't get it going anyway.. I could use 4 opamps and i want the signal to be amplified from a microphone, it must be using a low voltage single supply and then to flash a bulb to the bass beat of music. Any other ideas would be most marvalous. Thanx Rich
  4. electrodoc2

    handy tip for intefacing your PC with projects

    I'm Building a 8X8 LED graphics display at the moment ran on the same principle so more posts on this to come. If any one knows how to scan a character and return a value that i can output to the port then that would be most handy to make it clearer i know how to do the opposite ie for the...
  5. electrodoc2

    control RELE by parallel port of pc

    didn't have much time on last post to explain clearly but look at my other thread where i've posted a few notes and a diagram/explanation. http://www.electronics-lab.com/forum/index.php?board=13;action=display;threadid=333
  6. electrodoc2

    handy tip for intefacing your PC with projects

    Had a bit of spare time so i did a sketch of a simple interface for the printer port. This was an original concept by myself to intergrate both my courses at college (electronics and I.T.) to control stepper motors in the cruedest of ways. It did work though and all the other guys where...
  7. electrodoc2

    control RELE by parallel port of pc

    hi use msdos 6.2's qbasic.. type, 10 out 888,1 this will send the left hand side top output from the socket to 5 volts , out 888,0 will send it back to 0 volts.. you will need a buffer inthe shape of an opto isolator or a transistor to run a relay but it's easy.
  8. electrodoc2

    Simple circuit switch

    if you use a 9volt PP9 battery then it would be easier to interface anymore electronic circuits you may need to trigger or run from your switching arangement. cheers .. rich
  9. electrodoc2

    Heeeeeeelp!!

    Hmm the humble 4017.. mega handy, hardly worshiped.
  10. electrodoc2

    Car Burglar alarm

    i had the vision of building one of these babys before and it's been re kindled after watching the 2nd series of pheonix nights.. lol Both using a tape and using a digital voice recorder are viable but as the tape decks are easy to come by and have a solenoid, magnetic reed switch, heads and...
  11. electrodoc2

    Cheap 8 channel R/C ancillary controller for models

    recently tried this and it works exeptionally well... i didn't bother with the diodes so i used a 4 way opto isolator due to using two seperate supplies. 12volt for the decoder and a 4.5 volt battery supply for the reciever.
  12. electrodoc2

    infrared application

    find schemetics for a tatung 'D' series television and look at the infrared reciever section there you'll findn i/r reciever with 3 pins +5volts, ground and output. these cost
  13. electrodoc2

    Simple circuit switch

    heres the answer to your switching problem (see atachment) .. But why are you using only 1.5 volts? and what are you planning to control with a 1.5 volt supply voltage? i'm also pondering over what such a switching arangement may do!.. or is it that you have finally found a use for AOL cd roms...
  14. electrodoc2

    datasheet for LA4440

    there you go.. the number (NTE****) is a replacement p/no http://www.nteinc.com/specs/1300to1399/pdf/nte1377.pdf
  15. electrodoc2

    Flyback driver experiments

    Hi Steve, i have also been on the H/T and static electricity thought train and i feel it could be a worthwhile study but i have no time to do the experiments that you outline.. mail me at [email protected]
  16. electrodoc2

    Inside a TO-3 Transistor case

    it was a few years ago when i was begining in electronics i got approx .25 of a volt and i didn't take a current measurement im afraid. a guy who was known to be eccentric told me of this phenomenon so i tried it and low and behold there was a voltage there.
  17. electrodoc2

    Cheap 8 channel R/C ancillary controller for models

    would have inserted the circuit here but dunno how to do it yet so i'm affraid its a small 75k attachment. an idea i'm toying with.
  18. electrodoc2

    Audio IC's

    the tda2506 seems to be a secam decoder tried to search but found that but nothing on my s/engines for that number.. tried a few though. is it a car stereo? if so put a couple of phono leads through the back and feed them to a seperate car amp. try the links yourself if you want...
  19. electrodoc2

    Need Datasheet for TA8680N

    it certainly does look like a jungle chip.. here you go.. wow that took some finding!! it seems to be a replacement for the 8680 despite having a completely different number. 1 of the links is for the data sheet the other is a link from a link that was linked in a link from a search submitted...
  20. electrodoc2

    Monitor's Led blinking

    I don't know your skill level so i'll explain it basically. The most common cause is the line output transistor, take it out and check it with the legs pointing towards you and the writing facing upwards, set your avo on diode check (if its digital meter) or the lowest setting you have for ohms...
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