Search results

  1. C

    need more backup

    You can't. Just make sure the battery is fully charged. It may be old and worn out.
  2. C

    AC Regulator for Bike Lamps

    You are killing up to 60v and 7 amps.
  3. C

    What is the resistance and wattage of this resistor

    What is on the other side of the resistor?
  4. C

    AC Regulator for Bike Lamps

    Firstly, you should consider switch-mode as it will produce very little heat. How much current do the lamps take?
  5. C

    More woes driving LEDs via PWM

    Have you connected the SOURCE lead to 0v?
  6. C

    Step Down DC Buck Capacitor Blow up

    How can IN=8v OUT=36v be a step-down converter??? You obviously put 48v on a 35v electrolytic.
  7. C

    Step Down DC Buck Capacitor Blow up

    Th electrolytic is 35v The battery is 48v . . . .BANG !
  8. C

    Where could I find a low RPM high torque motor?

    Our shredder (granulator) runs a quite a high RPM. The secret is the flywheel. You need a very heavy base to the blades otherwise your shredder is going to jam. DO NOT USE A GEARBOX - obviously from someone who does NOT have a clue what he is talking about.
  9. C

    how to Design SMPS.

    And working with 10 amp will be impossible for you. I am going to be a brain surgeon next week. I have a little book: "How to be a BRAIN SURGEON in 2 weeks"
  10. C

    Want to increase brightness of LED headlight

    This is the circuit you need:
  11. C

    analog and digital 30V Voltmeter for Power Supplies

    Yes, you are right Chemelec. This one costs $20.00 and you get 19 of them and the shipping costs are ZERO. Where have you been living ?? Under a rock ??? Green Mini DC 0-100V LED 3-Digital Display 3 Wire Voltage Voltmeter Panel Meter $1.09 Free international shipping
  12. C

    analog and digital 30V Voltmeter for Power Supplies

    You can get digital voltmeters with 3 wires for $4.00 on eBay.
  13. C

    4020 divided outputs

    Put 4 and 8 on supply. Use a 12v battery Put a resistor on the output of 555 say 10k or higher. That will fix it
  14. C

    Solenoid

    The secret is in the "gripper." And it is much better to use a modified SERVO. The GENEVA MOTION is about the closest thing to describe what you need.
  15. C

    need help with usb powered ultrasonic humidifier

    You need photos of the parts inside the case.
  16. C

    Solar Panel and 12V Deep Cycle Battery advice

    You are using 80 watt-hrs per night. One panel will produce 20 x 5 = 100 watt-hrs per day. Just use 1 panel and connect it directly to the battery via a 3 amp diode. Nothing else is required.
  17. C

    What would be the effect If I change 4700uF capacitor to 18000uF?

    The only thing that might happen is the fuse will blow. This is because the 18,000u will take longer to charge when the amplifier is turned ON and the fuse will pass a high current for a longer period of time and this will be seen as a short-circuit and it will gradually weaken and eventually die.
  18. C

    DIY programmable battery charger

    Connect the charger and let us know the current after about 10 hours.
  19. C

    DIY programmable battery charger

    Firstly we need to know the amp-hour of the battery you are charging.
  20. C

    Adding an external 240v garden light

    Why don't you add the outside light to a power cord and plug it into a 240v socket. This will cost you nothing.
Top