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  1. Arouse1973

    LED conversion

    I guess the resistors are for the LED, to limit the current. Could do with a close up if you can. Adam
  2. Arouse1973

    Can I use a blender motor as a fan?

    You either wear down very cheap brushes or replace expensive motor when it wears out. Your choice :) Adam
  3. Arouse1973

    N Channel Mosfets

    I don't know much about Tesla coils. They look like just a basic transformer with effectively an air core. So yes I guessing they would need to be tuned, and that's both primary and secondary. You don't have any core material to help with energy transfer, so you need to resonate the circuit to...
  4. Arouse1973

    Photoelectric Sensor circuit

    Colin you forgot the link to the sensor Adam
  5. Arouse1973

    Can I use a blender motor as a fan?

    Yes just don't get it to close to your face :) The only two issue I see is the need to replace the brushes that will wear out after time if you continuously operate the fan. Also make sure the fan doesn't spin too fast, otherwise you will have to reduce the voltage to the motor. Adam
  6. Arouse1973

    Noob taking on a big project?

    Hi Matty Well it's up to you really. You need to set your own pace rather than us just overload you with advice and circuit diagrams. This would be a great opportunity for a project log btw. Then people can keep track of what you have been up to. My first approach to this would be choosing the...
  7. Arouse1973

    Spying device for unfaithful girlfriend

    Why don't you just ask her and see if she is lying?
  8. Arouse1973

    Choice of a Stepper Motor Driver

    The answer to your first question is the factory pre-set for the output current is 330 mA. You need to change R16 on the PCB to achieve 833 mA, I think it's a POT. The ref pin voltage for max current is 5 volts. Try this first before choosing another device. Adam
  9. Arouse1973

    Photoelectric Sensor circuit

    Hi dml. Well I am afraid it is that simple, unless you want it to do something else. Welcome to EP btw. As long as the sensor can drive the relay you have chosen it should work. Also note that if the unit is not blocked most of the time the relay will be on wasting energy. If you want it the...
  10. Arouse1973

    N Channel Mosfets

    So how many turns do you have on the secondary? Adam
  11. Arouse1973

    Noob taking on a big project?

    That's not a bad idea, but you might not need it. You could have a small fan running all the time to save on complexity. Adam
  12. Arouse1973

    Noob taking on a big project?

    I think that's a good idea. Start out learning a bit of electronics and then progress onto a bit of programing. Adam
  13. Arouse1973

    Noob taking on a big project?

    Hi Matt. Don't want much then :) Welcome to EP. This seems straightforward enough. However the LED strip light part of the project will be challenging if not done in a micro processor. I guess you want to build this out of discrete parts and are not interested in learning to programme a micro...
  14. Arouse1973

    N Channel Mosfets

    Yes you hit the nail on the head. Another thing you have to remember about switching high power Mosfets is the transient gate current and that if you want to switch the MOSFET on quickly, which is what you need to do from a dissipated power point of view. You may need to supply quite a bit of...
  15. Arouse1973

    Not getting the ideal 555 output

    The capacitor initially has the same voltage across it due to the two 10K resistors. The RC at the start of the circuit gives a small settling delay for the circuit. After a short time delay the Darlington switches on and places a low on this side of the plate. The other side of the capacitor...
  16. Arouse1973

    N Channel Mosfets

    Yes well that's why that version worked then :)
  17. Arouse1973

    N Channel Mosfets

    When you have 5 mins, post a picture please. Adam
  18. Arouse1973

    N Channel Mosfets

    Do you have any heat sinks fitted to the MOSFETS? Adam
  19. Arouse1973

    Magnet Alarm Circuit Board, Battery Power

    Yes looks like it is from a set of Christmas tree lights or something similar. Adam
  20. Arouse1973

    Reverse bleeper booster

    You also might be able to use a light sensor to detect when the reversing is on. Then this could be used to trigger another beeper. I have done a similar thing using fibre optic cable shining onto a photo-transistor. Adam
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