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  1. C

    'Chasing' LEDs

    Shift register(s) and transistors (in ic form) and a micro controller for ease of use
  2. C

    Over voltage protection.

    A TVS diode is /the fastest/ way to protect sensitive circuitry, the TVS diode will react in picoseconds...
  3. C

    Help making remote control LED lights

    Yes, fair amount of work involved as you'd need a remote/reciever circuit in every room, all of them need to talk to the main box with the 5 LEDs in, if you can get them to manually push something instead of a remote that's a lot of time saving.. communications could be done over 400mhz or use...
  4. C

    Having trouble analyzing this power supply..

    I recreated your circuit, added what i thought was missing, this will give you a nice cleanish 5v output... But please don't use it if you have to come in contact with it daily, when the 240v cap on input fails, your heart will fail as well if you're touching anything conductive
  5. C

    Having trouble analyzing this power supply..

    If you're new, this is a potential death trap...
  6. C

    simple clock divider by 10

    I guess the question begs, what's the frequency?
  7. C

    Problems with transistor on test circuit (beginner)

    Your circuit is a pass transistor circuit, ok for example you have a 78l05, anything over 100ma of current could kill it, but you don't have a 7805 (1amp) You feed the 5v regulated source into the base, collector takes a higher voltage say 7v , the transistor spits out 5v (minus 0.6v)on it's...
  8. C

    Over voltage protection.

    You'd normally have a MOV hot side / 110/240ac but on the 12v side, place a 12v TVS Diode across your 12vdc out
  9. C

    simple clock divider by 10

    An attiny85 if you wish....
  10. C

    Problems with transistor on test circuit (beginner)

    In this instance, for all intents and purposes it's switched on 3v on the base, it might not be fully saturated, but it's more "on" than "off" Ps i made a circuit to do what he wants, hence all the fuss!
  11. C

    Problems with transistor on test circuit (beginner)

  12. C

    Problems with transistor on test circuit (beginner)

    The op clearly states he wants to run it with 5v not 3v...
  13. C

    Problems with transistor on test circuit (beginner)

    No, that's how npn's work, the voltage on the base -.6v = out 2.8-3v to the motor! (The transistor is acting as a pass transistor)
  14. C

    Problems with transistor on test circuit (beginner)

    "no, he's using 3V to turn on the 5V through the transistor ;) look again ----------------- No, you look again, yes the transistor will switch on, however the motor only gets 3v not 5v like the op wants! and your 80 Ohm resistor isn't needed ... I see no point in it ----------- There is no...
  15. C

    150v DC-DC buck converter

    Simple switchers should allow slow startup, gradually soft startup (although a capacitor on it's reference pin should give that) The motor produces 110v low current DC? (Not AC)
  16. C

    Problems with transistor on test circuit (beginner)

    Takes a lot to stop a 2n2222 :) But for a motor use a ceramic cap? For relay, a diode in reverse across it? But for a cfl, capacitor and resistor / snubber? All for 1 thing inductive voltage spikes, any more ways of snubbing/shunting! Just thinking out loud, but a TVS diode could be used ...
  17. C

    Problems with transistor on test circuit (beginner)

    The resistor/80ohm resistor is just the load... He's driving the motor with 3v (schem says 5v)
  18. C

    Problems with transistor on test circuit (beginner)

    You designed it wrong, motor says 5v, and i presume the 3v is to turn on the motor? If so, this is far more efficient
  19. C

    Apple vs the FBI

    That could be tricky i'm not into writing drivers :) But for the purpose of recovering data, any old compatible rom i'm able to compile from source ... Something that can not be done for iOS because it's closed source, so i guess the fbi probably has this covered already for android!
  20. C

    Apple vs the FBI

    I wonder what i need to compile the linux based OS, my own android rom lol
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