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  1. Arouse1973

    Driving SCRs for coil gun and EMF protection

    Well you have not supplied a circuit diagram so I can't see your capacitor bank. And you assume we all know what a 5 stage coil gun is. Well I don't. Can I ask first, how do you plan to turn off the device?. Just making sure you know you can't just remove the trigger. The gate is also going to...
  2. Arouse1973

    LiPo over discharge protection

    This is a series version of one that we use in our company You choose your own FETs, this might work but you would need an adaptor PCB to solder this because it is surface mount. Hope this helps Adam
  3. Arouse1973

    Op Amp Stability

    Thanks Adam
  4. Arouse1973

    Op Amp Stability

  5. Arouse1973

    How do I build a Metal Detector?

    I have never used a 555 so I can't comment Kris. Adam
  6. Arouse1973

    Computer Software to Simulate Circuits?

    Nice work Harald. I use the .lib or .inc commands that link to the website where the spice files are stored. Then all you do is pick the correct generic component and add a spice directive. .inc http://www.onsemi.com/pub_link/Collateral/NTD20N03.LIB or .lib...
  7. Arouse1973

    Formula to get voltage on circuit

    I am the same as you Kris.
  8. Arouse1973

    How do I build a Metal Detector?

    Hi Kris Might it have been this one? http://www.555-timer-circuits.com/metal-detector.html Thanks Adam
  9. Arouse1973

    How do I build a Metal Detector?

    If your circuit is built the same as your schematic then it looks like your clock in is shorted to 0V. but I can't see the bottom of the circuit on your picture you might have a resistor fitted. Thanks Adam
  10. Arouse1973

    Formula to get voltage on circuit

    Or what about (6V-1.5)/2 = 2.25V. Subtract the lower battery voltage from the top battery and replace the bottom battery with a short. Then you just have to work out the potential where the two resistors are joined in the middle with respect to 0V. This is just a simple potential divider and...
  11. Arouse1973

    Op Amp Stability

    I have tried to answer Lvw's questions to the best of my ability, here they are. I have not included wording changes request by Lvw. 1)Thread Quote: This gain is usually very high. It is high because you normally close the loop with feedback which stabilises the op-amp and increases the...
  12. Arouse1973

    Op Amp Stability

    I am happy to plod through Lvw suggestions and I will have some more questions which need clarification later. Thanks Adam
  13. Arouse1973

    Op Amp Stability

    No Lvw, hence the smiley face, It was a bit of humour. I am taking your comments seriously and you will see I have added some of your wording already. I haven't quite finished yet I am still working on some of your questions. Adam
  14. Arouse1973

    Op Amp Stability

    Anything else? :)
  15. Arouse1973

    Op Amp Stability

    Thanks Lvw. Some good points made I will make some corrections over the next week. Adam
  16. Arouse1973

    Op Amp Stability

    Yeah sorry I thought you got an alert when I changed the post.
  17. Arouse1973

    Op Amp Stability

    Thanks Lvw I always welcome a keen eye. Let me know if I have missed any pictures or plots that need updating. Thanks Adam
  18. Arouse1973

    Op Amp Stability

    Cool Steve. Thanks for that. Apart from the are you mostly happy with this? Thanks Adam
  19. Arouse1973

    Computer Software to Simulate Circuits?

    Thanks Kris mate.
  20. Arouse1973

    Needing help with sensor/meter project

    Your measuring ions. That's impressive and with a bipolar transistor wow. Can you supply a circuit diagram. Adam
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