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  1. eurobuskers

    controlling 220v

    ah ha!!! Ive got it, I used a dual opto isolator, the +ve pulse goes into one, and the -ve into another. Now  ive bought the bits and got it all working, I can now say that the project is working and finished!!! however... it cost me more than a bistable relay!! lol !!! I spent 40
  2. eurobuskers

    using computer speaker amp for portable sound system

    no probs, take out the rectifying diodes and put the battery the right way round. test it first before putting a big battery with a small pp3 for example, then use a bigger 12v one. Many years ago, I was a busker and used the same thing connected to a guitar, I also found( and be careful here as...
  3. eurobuskers

    Power freq 50hz or 60hz issue

    maybe the motors will turn faster , thus the timer for the cycles faster too!!! this would mean your 1 hour cycle for coloured items will only last about 50 mins. it could be ecologically a good move to go from 50hz to 60hz. If you go to 50hz from 60, you might burn out the ozone layer a little...
  4. eurobuskers

    controlling 220v

    thanks, its as I thought, I used a 4011 cmos to make a bistable with a centre tapped commo so I can have a plus control iP and a minus control ip after the weekend, ill tell you if it worked  ;D
  5. eurobuskers

    controlling 220v

    ok, its a Gardena radio cotrolled programmable system for switching on and off stuff in the garden. I got it cheap, and got receivers cheap too. The power switches and the electric taps are very expensive though so I managed to rig up a 10
  6. eurobuskers

    controlling 220v

    thanks, ill look up this idea on the net, I suppose i'll have to do something to switch on and another to switch off, the prolbem is the type of control signal I have, I imagine these switches will switch on as soon as there is a signal in, but, if the signal stops the switch will switch off...
  7. eurobuskers

    controlling 220v

    the original control signal is intended to control a 6v water valve which is a 2 coiled electro-valve. in the shops I could buy a very expensive switch which fastens onto the receiver ( which has 4 o/ps) thus being able to swich on garden lights for example. The nature of this signal is that it...
  8. eurobuskers

    controlling 220v

    Ive got a radio-command garden programmer which controls the watering system. Ive built a bistable relay to switch on and off the water using a 24v system instead of the expensive recomended 9v system. This works fine. the receiver of the programmer gives out a short 6v signal to switch on the...
  9. eurobuskers

    Use a speaker as a microphone while useing it as a speaker

    if the circuit between the 2 speakers (that is one for each person communicating) is switching between transmitting and recei  8)ving at a very high speed (10k for example) the problem could reduced assuming we know the distance between the 2 people?
  10. eurobuskers

    ELSEVIER-Referex

    I found this torrent of the ELSEVIER-Referex this is about 4.7 giga of pdf files covering all engineering reference http://thepiratebay.org/details.php?id=3453473 personally I got just the 1.5 giga of electronics but if you want to build a hydroelectric dam in the garden there's all the info...
  11. eurobuskers

    how to build my own buzzer? (or other noise maker)

    there exist shall motors which run of these solar cells, all you have to do is put little bells on buts of cotton which turn round and hit something.  :o
  12. eurobuskers

    WKC 3883 Car radio

    about 20 years ago I discovered when working at a company which repaired car radios that there was one chip which worked off 5volts. The secret is to look up the No of the chip on the net and find the reset pin. DONT put this to 0v or 5v or certainly not 12v this does not work, simply put 100hz...
  13. eurobuskers

    Use a speaker as a microphone while useing it as a speaker

    I use skype, the speaker is just next to the micro and there is no feedback. there is a distance where a micro ans speaker will howl, therefore maybe the fact the sound I make has to go through the net and back before it is fed-back stops the feedback getting to the micro as it has to treat...
  14. eurobuskers

    wierd stuff !!!

    you all gotta see this stuff !!! time shift measurers gravity machines etc, and all with cct diagrams !!! http://www.ctglabs.com/ :o
  15. eurobuskers

    Pellet Gun target

    maybe 3 metal detector ccts with the coils behind each ring?  ;D
  16. eurobuskers

    pellet detection

    oops I meant to reply to the target link, sorry
  17. eurobuskers

    pellet detection

    maybe 3 metal detector ccts with the coils behind each ring?
  18. eurobuskers

    Use a speaker as a microphone while useing it as a speaker

    one should NOT say "one cant do this or that."  :o I think its a cool idea, who cares if it sounds like shit, the Idea has not been done yet, so it should be tried. If it works then work on the quality. I think the first battery was a lemon with two strips of metal, once it was found to work it...
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