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  1. Arouse1973

    Electric Calculations

    Hello Please supply the details of the PSU. Thanks Adam
  2. Arouse1973

    How can I know my ESD mats are OK?

    To test the mat correctly we use a resistivity meter. http://www.alibaba.com/product-detail/esd-mat-tester-esd-mat-surface_60204288454.html Thanks Adam
  3. Arouse1973

    What diode is used in this schematic?

    He is right and wrong. SCR latch up is internal and once started it doesnt matter what the input resistor is. It can at worst destroy the device. To avoid this do what I said about the resistor, place a pull down on the input after the input resistor. Adam
  4. Arouse1973

    How to increase current in a circuit

    For it to boost voltage it requires current, the input current can be more than output current.
  5. Arouse1973

    How to increase current in a circuit

    But thats how a booster works. So what you are saying is you need a boost circuit that boost voltage but the input current needs to be the same as output current? Adam
  6. Arouse1973

    What diode is used in this schematic?

    The input does not have a zener diode. It will have two diodes connected in series and the input goes at the join of the two diodes, one end connect to supply the other to 0 Volts. These diodes are to protect the input from very fast over voltages from an ESD event. The input is not designed to...
  7. Arouse1973

    What diode is used in this schematic?

    Looking at your circuit again, can I make a comment? I am not a great fan of using the input diodes of a micro as a clamp. It could still cause Latchup IMO. It would be better to have a pull down resistor on the sense input so as no more than 5 Volts appears on the input. This will also help...
  8. Arouse1973

    What diode is used in this schematic?

    Ah yes Kenneth, I forgot about that stupid Arduino delay. So yes go for the higher power versions. Adam
  9. Arouse1973

    What diode is used in this schematic?

    It's only momentary operation isn't it? So a lower current may be ok. The FET will take all the current when the circuit is powered up. Yes a Schottky diode can be used for this. Adam
  10. Arouse1973

    What diode is used in this schematic?

    Can you estimate how much current your circuit will draw? Adam
  11. Arouse1973

    Hey, have you seen one of these?

    Yeah electronics quizzes, what a great idea. Adam
  12. Arouse1973

    Hey, have you seen one of these?

    What does it go? Adam
  13. Arouse1973

    Small Inductance meter

    Remove the components and use an LCR meter. Or inductance meter. Adam
  14. Arouse1973

    Hey, have you seen one of these?

    Ahhhh doing my head in. Adam
  15. Arouse1973

    Protection diode melted and burnt

    For some reason E was used because printers couldn't print the Greek letter "Ω" reliably. I have heard it was something to do with the Dutch. I don't remember any more. Don't know why they didn't use the letter R. Maybe it's just because they are E series? Adam
  16. Arouse1973

    Hey, have you seen one of these?

    I don't know if it is a Wheatstone bridge, looks a bit like one. Sheep shearer, I think you meant to say something else :rolleyes:
  17. Arouse1973

    Hey, have you seen one of these?

    It depends if they get in the way, ok maybe they get pushed off bridges :)
  18. Arouse1973

    Hi from Northern Ireland

    Hi Phil, welcome to EP Adam
  19. Arouse1973

    Got room for a resistor? :D

    A mere baby. :)
  20. Arouse1973

    Hey, have you seen one of these?

    Sheep like jumping off bridges and a Wheatstone bridge has four legs :)
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