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  1. Arouse1973

    Differential amplifier

    What are the resistor values you are using? Adam
  2. Arouse1973

    How to calculate R and C for Am Demodulation envelope detection?

    I think if you started off with an RC of 5 times the 1/fm (modulation frequency) and see how you go. There is a lot of contention over what formula to use. So try this first and see how you get on. Adam
  3. Arouse1973

    Hello everyone :)

    Hi Khen, Welcome to EP Adam
  4. Arouse1973

    Do I need resistors with my transistor?

    If you tell us the spec of the solenoid and what transistor your using I am sure we can work something out. Cheers Adam
  5. Arouse1973

    Hey there, I'm Nicholas

    Bring it on we are waiting :)
  6. Arouse1973

    Door Alarm Help Please

    Nice one ak, does this latch the sounder on also? Or is the reset button just to allow the door to be opened and stay opened if he wants to. Then it arms back up when the door is shut. Do you need any switch de-bounce? Thanks Adam
  7. Arouse1973

    Door Alarm Help Please

    Oh ok I thought it was for night time when he locked up.
  8. Arouse1973

    Door Alarm Help Please

    What if the burglar shuts the door? I think he wants the alarm to stay on? Adam
  9. Arouse1973

    Door Alarm Help Please

    Are you suggesting this as an option? Adam
  10. Arouse1973

    Door Alarm Help Please

    Hi Matt I think the easiest option without having any other electronics is to have an external key switch which arms and disarms the alarm. Otherwise your going to need a timer of some kind to allow you to get out and shut the door. The key switch could just break the power to the relay. Adam
  11. Arouse1973

    LTspice, Warning node is floating

    I don't know about the voltage, maybe the model doesn't do that. Some models have some features taken out. You will need to contact the manufacturer or post a question on LT user group https://groups.yahoo.com/neo/groups/LTspice/info With the diode I always try and get a .lib file or open the...
  12. Arouse1973

    Is it possible to power relay and relay circuit with same battery?

    @BobK I need you again... :)
  13. Arouse1973

    Is it possible to power relay and relay circuit with same battery?

    Do you have a circuit diagram we can see?
  14. Arouse1973

    Scary...

    What scares me the most is mains. They think they flashed an LED from a PP3 and now they can do anything.
  15. Arouse1973

    Programming - Solenoid valve in an irrigation system

    There is something odd about your circuit. Can you please run through how it is supposed to work. Thanks Adam
  16. Arouse1973

    Why do I see random people on websites giving answers that make no sense?

    Hello Zionosis Lithium ion batteries need a two stage charging sequence to achieve full charge. This is constant current usually 1C but can vary between manufactures. The constant current is applied until the desired peak voltage for that cell is reached. The charger should then switch over to...
  17. Arouse1973

    transformer doubt

    Thanks Trevor. I didnt know that. You sure know your transfomers. Adam
  18. Arouse1973

    transformer doubt

    No thats fine, we do this all the time. Adam
  19. Arouse1973

    Timed Power Socket

    Is this to power mains powered equipment? What do you know about electronics and electrical circuits. Saying dont touch the live terminal is not enough. :) Adam
  20. Arouse1973

    Hi, I'm Cris

    Ho Cris, welcome to EP. Please explain a bit more about what you want to do. Thanks Adam
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