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  1. Arouse1973

    Conditioning Electronics

    Ah yes your right, I was looking at the actual non-inverting pin voltage which is -5 Volts. Adam
  2. Arouse1973

    How to control 80 relays using ardrino

    Neat Idea Harald! Adam
  3. Arouse1973

    How to control 80 relays using ardrino

    What if he want's independent control of the relays? I guess a shift register won't work? Adam
  4. Arouse1973

    How to control 80 relays using ardrino

    Use a transistor to switch the relays. Adam
  5. Arouse1973

    Sensorless BLDC motor driven synchronously.....hrmmm...

    Sounds good Fish! Adam
  6. Arouse1973

    Conditioning Electronics

    Having another quick look. I see when the input is 15 Volts the output of the first buffer is -15 Volts. This puts -5 Volts on the input of the last op-amp. For 2.5 Volts out this would need a gain of 2 (inverting). This is (2500/2)/625 = 2. I think that's right. Adam
  7. Arouse1973

    Conditioning Electronics

    Hi Hop Isn't the output approx. +2.5 Volts. Adam
  8. Arouse1973

    Conditioning Electronics

    Hello Is this the circuit and values they say will work? Or is this something you got of the internet? Adam
  9. Arouse1973

    Material detecting sensor(s) system.

    Well metals are easy. Eddy current detection (Metal detector) Plastics are a bit more tricky and as mentioned would require some special sensors. One of the main types of sensors used are NIR (Near field Infrared). All material absorb different amounts of NIR which is dependant on the type of...
  10. Arouse1973

    Need help identifying this component ...

    LOL, you do make me Laugh Martina :) Adam
  11. Arouse1973

    Need help identifying this component ...

    Um... can't find that part number on Vishay's website. Got me thinking it might even be a capacitor network, but they normally have a tolerance letter like "K" after the value.... but this doesn't have that. So it might be a special.... Might be an idea to measure across some of the pins with an...
  12. Arouse1973

    Need help identifying this component ...

    Vishay resistor network. 475 could be 4700K but some of Vishay's networks have part number not related at all to their value. I'll have a look. Cheers Adam
  13. Arouse1973

    Need some help identifying this one

    Not that I am aware of, just the way they have marked it. Now the NTE517 has one solid mark for the cathode. Adam
  14. Arouse1973

    Need some help identifying this one

    Diode, made by NTE. Adam
  15. Arouse1973

    Very Basic circuit but I am struggling

    I think both you and Bob are right. Other options should be included if felt appropriate, as you mentioned not everyone can use a micro and not everyone wants to. I am glad you mentioned this, as a new comer it's refreshing that people still want to design circuits using discrete components. I...
  16. Arouse1973

    Very Basic circuit but I am struggling

    Give it a go Gavin, once the hang-over has gone :) Adam
  17. Arouse1973

    Name that switch!

    You could stick several strong magnets to your top and bottom teeth so when your teeth come together they won't come apart again :) All joking aside I haven't heard of anything either. Adam
  18. Arouse1973

    Need help with a volume pedal that uses 2 potentiometers

    Glad I could help! Adam
  19. Arouse1973

    Oscillator and transformer project

    You don't need much current to kill yourself. A PP3 battery can produce enough current to kill you but the voltage is too low. Anything of such high voltage needs to be treated with respect. Adam
  20. Arouse1973

    Need help with a volume pedal that uses 2 potentiometers

    I guess your using the A/D port for this. If you are able to set the A/D reference to 2.3 Volts then that should work. Adam
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