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  1. Arouse1973

    8-Pin Development Board

    Place the capacitors as close to the power pins as you can. Although all capacitors will filter noise to a certain extent the main purpose of the capacitors is to supply additional current to the circuit which is usually in short bursts for the small ceramics and longer duration burst for the...
  2. Arouse1973

    interactive rainbow led

    Hello deemster2 and welcome to EP. Yes a capacitor could do this. What is the working voltage and current you require. Thanks Adam
  3. Arouse1973

    8-Pin Development Board

    Yes you can use an electrolytic. It's not really about filtering noise it's about supplying packets of energy for the circuit when it's needed to try and maintain a stable supply voltage. Adam
  4. Arouse1973

    8-Pin Development Board

    Ok that's better. The cap I was talking about was in addition to the 100nF. Go and get some 2.2uF caps :) As you progress in electronics and your designs become more sophisticated you will find many times that just using what you have lying around won't always work. Cheers Adam
  5. Arouse1973

    Trying to understand a low voltage warning circuit

    Hi there. Well you do have a good grasp of how the circuit works but you voltage calculation is not correct. The other thing is the author is wrong about the battery cut-off voltages. 8 cell NICD cut-off is not 7.2 Volts the cut-off for a 6 cell pack is 7.2 Volts. That doesn't really matter...
  6. Arouse1973

    Helping me get started

    Hello Can you tell us a bit more about the project? What is the 4 wheeled device you are controlling, if human safety or vehicle control is involved this thread might not get answered. Thanks Adam
  7. Arouse1973

    8-Pin Development Board

    Hey John Your getting the hang of this now, look how far you have come from knowing nothing at the start. Good effort. The only thing I will say about the drawing is the bottom of the circuit looks a bit scruffy. See if you can neaten it up a bit also add a 0V symbol to let everyone know the...
  8. Arouse1973

    D-Type Flip-Flop (74HC74)

    Bring it on! Look forward to it. Adam
  9. Arouse1973

    Audio Amplifier Design

    Yes voltage amplification stage.
  10. Arouse1973

    Audio Amplifier Design

    What wattage resistor is R7? You also need some bias for your VA stage. Thanks Adam
  11. Arouse1973

    WARMING METHOD FOR LAMP ANALYSIS

    Hello Federico. You could use Nichrome wire wrapped around the test tube and power it from a constant current source. You may also benefit from some temperature measurement feedback if an exact temperature is required. Thanks Adam
  12. Arouse1973

    Surge protector

    You can use LT SPICE and download the MOV, GDT and Inductor model from the manufactures website. Thanks Adam
  13. Arouse1973

    D-Type Flip-Flop (74HC74)

    LOL, sorry about that Amanda. Missed the name. Another reason why people should sign off with their name :) Thanks Adam
  14. Arouse1973

    Mid voltage reference

    You are still better off to balance the bridge initially using the standard potentiometer in one leg of the bridge, that's how everyone else does it. Thanks Adam
  15. Arouse1973

    Mid voltage reference

    No your English is very good. Ok I think I now understand if the load cell goes the other way it needs to go below 2.5Volts. I thought you were only using it in one direction. Adam
  16. Arouse1973

    Mid voltage reference

    This is the whole point you balance the bridge first, you don't adjust out the bridge imbalance using the IAREF pin. Well I wouldn't. Adam
  17. Arouse1973

    Mid voltage reference

    Yes it will do both but most applications don't need this because the offset voltage is so low. Why do you think you need to adjust this, have you tried it in a circuit? Adam
  18. Arouse1973

    Mid voltage reference

    Also if you power the bridge from the amplifier you will maintain ratiometric measurements because the excitation voltage wont change much with variations in supply voltage. Adam
  19. Arouse1973

    Mid voltage reference

    The 2.5 Volt reference on pin 5 is for biasing other opamp stages that operate on a single supply. Adam
  20. Arouse1973

    Mid voltage reference

    How are you getting this negative voltage? You are using a single supply. Adam
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