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  1. Arouse1973

    which capacitor is best

    Can you post a circuit diagram and point to where the capacitors are on it. Gives up a better idea and we can then answer you accurately. Thanks Adam
  2. Arouse1973

    Quick Question About a LM2901N

    Are they made in Deutschland by any chance :)
  3. Arouse1973

    Quick Question About a LM2901N

    Thanks Harald Adam
  4. Arouse1973

    How do you PROPERLY split a wire into two or three ?

    They certainly do move in a d.c circuit and vibrate in an a.c circuit. My saying came about from a joke in the office about how slow the mechanical engineers were compared to us the electronics engineers. But I tried to keep it as factual as I could. The only thing missing at the end is the...
  5. Arouse1973

    Basic LED help please!

    What wattage resistor are you using sounds like it's too small it should be at least 5W? Also that is the maximum current the device can handle, do you need it to be that powerful? You can run them at a lower power level. Adam edit: yes sorry power rating of resistor should greater than 10W.
  6. Arouse1973

    How do you PROPERLY split a wire into two or three ?

    Yes why do you like it?
  7. Arouse1973

    How do you PROPERLY split a wire into two or three ?

    Yes you can. Make sure they have the correct current rating. Adam
  8. Arouse1973

    Quick Question About a LM2901N

    You beat me again Harald :) I must have been typing this as you posted.
  9. Arouse1973

    Quick Question About a LM2901N

    Hi Dan The device can sink 20mA and has a internal base current of 80uA so that's a gain of 250. The value of resistor will depend on the desired response time of the output. But there are min and max values, you will have to choose one in between that fit the requirements. Say 4K7 to start...
  10. Arouse1973

    How do you PROPERLY split a wire into two or three ?

    Extract from a Thailand wiring website. http://www.crossy.co.uk/wiring/DIY.html It is NEVER, EVER, EVER acceptable to just twist and tape wires together, get your electrician to use Wire Nuts (also known as a BP, cone, thimble, Marrette or Marr connectors) and finish with tape. These...
  11. Arouse1973

    How do you PROPERLY split a wire into two or three ?

    Yes it's called a junction box.
  12. Arouse1973

    preamp led driver help

    What phone do you have 500mV pk seems a bit low?
  13. Arouse1973

    gps vehicle tracking

    Thanks Dave
  14. Arouse1973

    preamp led driver help

    Kris let me know what you find. I have an S3 and would be interested in what the output is. I would do it but I dont have a scope at home. Adam
  15. Arouse1973

    preamp led driver help

    So I suppose that would be 2V peak ish if 1V rms was measured on I-pod. Maybe they are all the same after all and what I read was peak output.?
  16. Arouse1973

    preamp led driver help

    Yeah not sure what the output is I think it's probably RMS, so that's even better. Found this for I-pod touch but I think the I-pod clasic has greater output from what I have read. http://kenrockwell.com/apple/ipod-touch-4g.htm#perf
  17. Arouse1973

    preamp led driver help

    Changed the diode to 1N4148 and top of diode 1.23V and base of T1 865mV.
  18. Arouse1973

    preamp led driver help

    I was going to mention about the emitter follower. I-pod can put out over 2Volts I believe. 1V pk signal was used, no need for RMS conversion for this. Diode voltage is 865mV. Adam
  19. Arouse1973

    Display cabinet - PIR motion sensor & LED lights

    Hi Harald Just a question as I am intrigued. Why do you opt for R3 and no base resistor versus no R3 and a base resistor for Q2. What's the benefit? Cheers Adam
  20. Arouse1973

    preamp led driver help

    Nice one Kris. Well it does work. Fig1. Showing Circuit Diagram and D.C operating points. Fig2. Showing Transient Plot 10Hz 1V Square Wave You could adjust R2 and R3 if you wanted to straighten up VF1 and VF2. Thanks Adam
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