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  1. C

    Trying to get LED strip to flash simultaneously.

    "This has to be a new low in bad advice." What are you talking about ??? That's exactly what I did with a buffer transistor and all the strips are flashing together.
  2. C

    PCB panelization

    Just leave 100 thou for routing.
  3. C

    Driver circuit

    It's already been done above.
  4. C

    Driver circuit

    The circuit is so simple that anyone with 40 years experience is designing 555 circuits can draw it for you.
  5. C

    charging systems question

    When the voltage of the battery rises to a level that it passes through zener diode D2 and into the base of Tr2, this transistor is turned ON. R2 and R3 are included to adjust the voltage accurately as the zener diode has a tolerance and we want the turn-on or turn-off point to the accurate to...
  6. C

    charging systems question

    You can now see the voltage from the battery connects directly to the field winding and the alternator produces maximum output.
  7. C

    charging systems question

    Now we only have Tr1. Tr1 is turned On via R1 and the Diode D1. The voltage between the collector and emitter is small and we can replace the transistor with a link
  8. C

    charging systems question

    So the transistor disappears
  9. C

    charging systems question

    When the battery voltage is LOW, TR2 is not turned ON and it disappears from the circuit:
  10. C

    Driver circuit

    You can do it with a couple of transistors and 2 zeners. The circuit is so simple that anyone here can draw it for you.
  11. C

    Need help designing hockey scoreboard circuit(s)

    I have the remote control scoreboard as a project. My digits are 100mm
  12. C

    Photoelectric Sensor circuit

    These sensors are $1.00 on eBay. You need an amplifier (buffer) to drive the relay and a pot to set the conditions for the photo sensor.
  13. C

    Shoot timer circuit

    Icanreadtherequirementperfectly. I have designed a project for a similar requirement of throwing a ball and working out the speed of the ball. I will let you know when I have finished it.
  14. C

    Trying to get LED strip to flash simultaneously.

    Just add a flashing LED in series
  15. C

    Miniture power supplies ?

    Put two together to get 10v. That's close enough.
  16. C

    N Channel Mosfets

    You are not going to get any energy transfer between the primary and secondary when you use AIR. It has to be IRON or FERRITE. It's nothing to do with back emf. It's just a matter of saturation and high current
  17. C

    N Channel Mosfets

    Try a 800v transistor
  18. C

    vehicle detection system

    The simplest is to run a thin rubber hose across the road and detect the air pressure.
  19. C

    N Channel Mosfets

    The problem is the back emf from the primary winding is entering the MOSFETS and killing the back emf you are expecting from the secondary. You need a higher voltage MOSFET
  20. C

    How to connect led light with mobile headphones

    Wait for mac12 to reply.
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