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  1. Arouse1973

    Help with LEDs and AC power

    If you disconect the LED light do the bike lights look ok with the cap connected? If so then its just the impedance of the cap. When the supply dips and the cap takes over it will need to be charged up again. If you dont have a limitting resistor the the capacitor could draw a very large...
  2. Arouse1973

    IR Leds or Visible ?

    And you mate!
  3. Arouse1973

    problem programming pics

    Good one Bob! Adam
  4. Arouse1973

    Help Selecting A Switch (Novice)

    I had to Hop, 73 de AC8NS is your call sign? Adam
  5. Arouse1973

    Need your advance help to verify my design

    D1 is connected to nothing should this be connected to RAW? Why do you have the second voltage regulator? Does the Arduino not output 5 Volts on Vcc? Neaten up the wire from pin 13 going across the Arduino. All your circuit shows is a load of connections so yes it looks ok. But if you want us to...
  6. Arouse1973

    Electronics PDF file

    Purchase The Art of Electronics. It's a good place to start. Please pay for it, because you wouldn't want people gaining your hard earned knowledge for nothing would you. Adam
  7. Arouse1973

    Help with LEDs and AC power

    Doesn't the bike have a battery? You could add a series resistor but you will still need to supply a certain amount of current for the LEDs plus some current to charge the capacitor back up to replace the energy lost due to the fluctuating voltage. You may need to turn off the lights initially...
  8. Arouse1973

    problem programming pics

    Hello You don't have a pull up resistor for your reset line. The Pick kit 3 may be holding it in reset but even if it is not, a resistor is needed to allow the program to run. Look at the data sheet for the PIC to see the recommended circuit. It's normally a capacitor and a resistor. Are you...
  9. Arouse1973

    IR Leds or Visible ?

    Hi Colum You can adjust the light output of an LED from nothing to it's maximum rating by changing the current. The life of the LED is also effected by current, but even at maximum current they still last a very long time. You can also pulse them at current greater than the maximum but you would...
  10. Arouse1973

    Help with Unknown Component

    Bit low on the current I think. You got it bang on apart from the max surge current. I think the part in your pic is a 10-15 KA type. See if you can find one, or a 20mm disc rated for 10 KA. If not then the part you chose will work but it might fail quicker than the other parts. I wouldn't want...
  11. Arouse1973

    IR Leds or Visible ?

    For glass fibre cables it is better to use IR because of it's greater wave length. This gives less attenuation versus visible light. Thanks Adam
  12. Arouse1973

    Ultrasonic Sensor Help

    Ah yes.........:rolleyes:
  13. Arouse1973

    Help with Unknown Component

    Defiantly an MOV. The first letters after the S1 I think is the size 20mm. The D is the type, I think means disc. And the 201 is the voltage rating. Which is 200 volt threshold and max working voltage of 130 A.C and 175 V D.C. Adam
  14. Arouse1973

    Ultrasonic Sensor Help

    Found this, so they are out there. http://www.alibaba.com/product-detail/80khz-High-Performance-Ultrasonic-Piezo-Transducer_634948085.html I also read a hearing aid microphone is good to 100K but sensitivity at 40K is down a bit. Adam
  15. Arouse1973

    Ultrasonic Sensor Help

    I recon a bit higher, I'll have a look Adam
  16. Arouse1973

    Ultrasonic Sensor Help

    Dave do you think he might be better off using a microphone? Adam
  17. Arouse1973

    Ultrasonic Sensor Help

    Hi Taylor Can you post a circuit diagram. It might be something in your design. Thanks Adam
  18. Arouse1973

    Help with Unknown Component

    Hi Henry What's the strange component? The orange squares or the white axial component? Adam
  19. Arouse1973

    stuck between the problem

    Are you seriously trying to teach yourself semiconductor physics? Adam
  20. Arouse1973

    intrinsic carrier concentration

    Correct well done. Adam
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