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  1. Arouse1973

    How a BJT Transistor works (base current version)

    If Ie controls Ic then how does this circuit work? Thanks Adam
  2. Arouse1973

    Help with a LED driver

    Hi Mark You could use a resistor or a constant current circuit. Adam
  3. Arouse1973

    Help with a simple DPDT relay circuit please

    Good David. Hope it all works ok now. Adam
  4. Arouse1973

    Help with a LED driver

    Hello How many LEDs are you going to use? Thanks Adam
  5. Arouse1973

    Electronic Parts

    Looks like the NTE2989 is an equivalent, although hard to find these people have a few. http://www.vetco.net/catalog/product_info.php?manufacturers_id=14&products_id=3199 Thanks Adam
  6. Arouse1973

    regarding voltage triggered switches

    Have a look at a comparator circuit. Thanks Adam
  7. Arouse1973

    Electronic Parts

    What are you having trouble finding? Adam
  8. Arouse1973

    Toggle Switch Covers

    Ring RadioShack, they might be able to help. Adam
  9. Arouse1973

    motion sensor using timer

    Well done Dan. Ads
  10. Arouse1973

    Looking for answers to questions in 2nd edition of the art of electronics

    For the first one I get 110V/10GW = 90x10^6 Amps which is 405 MW per foot so 10 GW will be lost in 24.69 feet, I think. You have the first part of the second question correct. The second line is wrong, how can you have a higher value than without a load? Is the Thevenins value with the load...
  11. Arouse1973

    Help with a simple DPDT relay circuit please

    OK no probs. Thanks Adam
  12. Arouse1973

    How a BJT Transistor works (base current version)

    Welcome back LvW, I thought you had left us. Hope you enjoyed your trip. Adam
  13. Arouse1973

    Help with a simple DPDT relay circuit please

    The common of the limit switches go to the motor. The NC of the switches go to the common of the relay. The NO of the switches go to +Volts I just used 12 V as an example. The NO and NC of the relay connects as in the diagram I drew. When the relay is off the motor drive must go towards S1. Adam
  14. Arouse1973

    Microcontroller controlled by pushbutton for LED flashlight

    Hi Jeff. Rember I made a mistake on my PCB, from what Kris origionally designed. I had the port pin for the on and off on the wrong pin. The design now has this corrected but I only have my demo PCB to work with. So any code I do has to have the port pin different. I suppose I should change my...
  15. Arouse1973

    Help with a simple DPDT relay circuit please

    You need a switch with a normally open and a normally closed. This might work. The important part is the direction of the motor when the relay is off must go towards S1 and not S2. The relay direction when the relay is on must go towards S2 and not S1. Operates as follows, when the relay is...
  16. Arouse1973

    Help with a simple DPDT relay circuit please

    Hello What switches are you using? Thanks Adam
  17. Arouse1973

    Hello, Welcome! (Introduce yourself)

    Hi Ken welcome to EP Adam
  18. Arouse1973

    5V to 4.3V PSU

    Is the power supply DC or AC? Adam
  19. Arouse1973

    Help with a simple DPDT relay circuit please

    You need to put one of the switches in one of the normally open circuits. You have both on the NC circuit. I assume the motor moves one direction when the relay is off and the the other direction when on? Thanks Adam
  20. Arouse1973

    Help with a simple DPDT relay circuit please

    Dont you dare think about paying for anything. Its free here. Oh and welcome to EP. Adam
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