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  1. Arouse1973

    New Here

    No I was very careful :)
  2. Arouse1973

    New Here

    I had a play with one of these a few months back. They will even produce a 50Hz sine wave from the vibration of a bench lamp held 2 inches away. Here they are. http://www.lprs.co.uk/sensors/vibration-sensors.html Adam
  3. Arouse1973

    Guitar pedal customization

    Hello. A simple resistor in line with the power wire might be all you need. What model of pedal is it? A couple of other things to note is that as the battery discharges as normal, with this modification you may find it stops working sooner than before. Also if you have other controls on the...
  4. Arouse1973

    please help

    Yes correct as I mentioned in post#2 Cheers Adam
  5. Arouse1973

    please help

    Not sure, you would need to change it or check it's working with some test equipment.
  6. Arouse1973

    I Need Some Help With a Level Indicator Project

    Why do you think I drive one of these. Just had it professionally cleaned today. :D
  7. Arouse1973

    I Need Some Help With a Level Indicator Project

    Sorry Hop I already took out the patent :p
  8. Arouse1973

    please help

    If it was working before you may have damaged the IC. Do you have another one you can try?
  9. Arouse1973

    I Need Some Help With a Level Indicator Project

    What sort of accuracy are you after? If it's 1 degree or greater then you might not even have to calibrate the unit.
  10. Arouse1973

    I Need Some Help With a Level Indicator Project

    Yep you got it. You can display anything you want. "Left a bit, right a bit, too far numpty" :)
  11. Arouse1973

    please help

    Yep.. sorry :oops:
  12. Arouse1973

    please help

    It says this pin should only be high when a valid tone is detected.
  13. Arouse1973

    please help

    What is pin 16 suppose to do? If you have connected it back exactly the same as before and you are using the same power supply as before and it's not working, you may have damaged the IC with static. Show us some pictures of your circuit board. Adam
  14. Arouse1973

    I Need Some Help With a Level Indicator Project

    Here is a link to one that you could connect to the Arduino. https://learn.adafruit.com/adxl345-digital-accelerometer/overview Adam
  15. Arouse1973

    I Need Some Help With a Level Indicator Project

    Hi Jon Would an simple character LCD work that displayed the X and Y values of a digital accelerometer. This is about as simple as I can think of. Adam
  16. Arouse1973

    Sensor interface, OP AMP, -500mV +500 mV to 0-5 V amplifier

    Yes Bob, that's why I used -1 Volts, but it could be -5V. So a combination of my circuit and yours should fit the bill. Adam
  17. Arouse1973

    Sensor interface, OP AMP, -500mV +500 mV to 0-5 V amplifier

    Good call. I have used these before for just this purpose. Adam
  18. Arouse1973

    Sensor interface, OP AMP, -500mV +500 mV to 0-5 V amplifier

    As long as the source driving the input to the op-amp is low enough you don't normally have to worry about input bias current balancing and input offset current. For this technique to work the input currents have to be well matched. For any other op-amp input stage other than the simplest...
  19. Arouse1973

    High Precision LED Absorbance Measurement

    Hi Jnod Do you have the actual circuit diagram you are using which shows the regulator, this will really help. The switching noise could be coming from your ADC or your DC/DC. You can find out which one by disconnecting your ADC or replace the DC/DC with a battery. Do you have the part numbers...
  20. Arouse1973

    Sensor interface, OP AMP, -500mV +500 mV to 0-5 V amplifier

    Well done Bob. I always forget the good old summing amplifier. Thanks Adam
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