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  1. Arouse1973

    Choosing an Opto Isolator

    An MOV is what I would use for a solenoid or an electromagnet. It allows the release of the solenoid much faster than a diode because of the reduced power dissipation. I think it's what they use for large solenoids for automatic entry systems into buildings that use magnets to hold the door...
  2. Arouse1973

    Trophy points implementation?

    Ian should receive the a world cup in my opinion. Such a quite chap I often wonder what's in it for him. I guess he like watching people help other people. Adam
  3. Arouse1973

    Sequential Timing Circuit

    If you tell me what PIC you decide to use and what LEDs you are thinking of using I don't mind drawing up the circuit for you and supplying a parts list. You need to let me know if you want any switches also. Cheers Adam
  4. Arouse1973

    1 print("Hello World");

    Hello Scipunk Adam
  5. Arouse1973

    4-20mA to ohms coverter

    The easiest option for standard 4-20 loop current measurement is to use a 250R resistor which will give you a range of 1-5 Volts. So each degree rise would be an extra 50 mV. I don't understand why your voltages are so precise at whole values of temperature. Adam
  6. Arouse1973

    Voltage Level Switch

    Nope other side of the resistor Dan. Cheers Adam
  7. Arouse1973

    Small SMT trim pot

    I used to live in Bracknell, and I am sure they had one in Reading maybe try there, I wonder if they do store pick up like RS. I'll have alook Adam
  8. Arouse1973

    4-20mA to ohms coverter

    So what are you doing? Connecting the resistor across the transmitter and then measuring the voltage? For something to know the resistance value of a resistor either the voltage or current to it must be fixed. And then either the voltage or current is measured to work out the resistor value. Do...
  9. Arouse1973

    Small SMT trim pot

    Yeah delivery is a pain, What about the local Maplin Store. Where abouts in the UK are you.
  10. Arouse1973

    Small SMT trim pot

    This one 42p http://uk.mouser.com/ProductDetail/BI-Technologies-TT-electronics/23AR5KLFTR/?qs=sGAEpiMZZMtC25l1F4XBU%2bo9fLf9DWN08VH88WEkm3k= This one 10p http://uk.mouser.com/ProductDetail/BI-Technologies-TT-electronics/35WR5KLFTR/?qs=sGAEpiMZZMtC25l1F4XBUwB3BIgHxXqd9zQnwvuEhhY%3d
  11. Arouse1973

    Small SMT trim pot

    Top one 62p http://uk.mouser.com/Passive-Components/Potentiometers-Trimmers-Rheostats/_/N-9q0yi?P=1yzekimZ1z0z7ym&Keyword=5K+pot&FS=True Thanks Adam
  12. Arouse1973

    Voltage Level Switch

    Hi Dan It will probably be fine but I think it's good practice to have a pull down on the base of the transistor to ensure it is turned off fully 1/10th the base resistor value will be fine. The output of the comparator will not go to 0 V more like 0.3 V. Although it's not enough to turn the...
  13. Arouse1973

    4-20mA to ohms coverter

    I get most of that apart from the panel recognises the resistance. How is your panel measuring these resistances or does it just see the voltage as an input? Does the convertor put out 160uA per degrees centigrade rise in temperature? Adam
  14. Arouse1973

    Finding Diptrace Components

    Basic components like diodes and resistors should be there. I have found diptrace to have a very exstensive component selection. Adam
  15. Arouse1973

    Voltage Level Switch

    Comparator. Thanks Adam
  16. Arouse1973

    high current motor driver ic

    Whats the problem in using what you have stated? Cheers Adam
  17. Arouse1973

    time delay

    Yep good. Adam
  18. Arouse1973

    Finding Diptrace Components

    Yes I do make my own most of the time. I have found so many problems with installed libs I prefer to make my own. Prevents a respin of a £400 PCB most of the time. But I will sometimes use the lib components and modify them and then double check. Adam
  19. Arouse1973

    time delay

    Ok if you cant tell the difference between the bell curve response of wind then what about a strain gauge. That will tell you how much the rod is bending. Adam
  20. Arouse1973

    time delay

    How do you deal with the problem of wind which he mentions in his original post? Adam
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