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  1. bertus

    Comedy Thread

    Thanks cmartinez AAC
  2. bertus

    And now something weird

  3. bertus

    Power transistor identification

    Hello, It could well be that the manufacturer obscurified the parts, so they must carry out the repair and can charge you for the repair. We can not tell you anything without knowing the numbers. Bertus
  4. bertus

    power supply to 1,5v (clock) AND 3v (LED)?

    Hello, What are the current requirements for the clock and led? As @Martaine2005 said, an USB charger might be a better start, as the voltage drop is much smaller. Bertus
  5. bertus

    8x8x8 led cube

    Hello, This page seems to have a lot of information on the 8 8 8 cube: https://www.instructables.com/Led-Cube-8x8x8/ What controller are you using? The given page uses an AVR, ATmega32. Bertus
  6. bertus

    Replacing a battery charger transformer with a audio transformer can I do it?

    Hello, The charger can give peaks of 50 Amps: A house receiver power transformer, even if it has a powerfull amplifier, will reach perhaps 6 Amps. Bertus
  7. bertus

    8x8x8 led cube programs

    Let's keep all in one thread: 8x8x8 led cube Bertus
  8. bertus

    And now something weird

    acapella sound effects: https://www.youtube.com/c/MayTreeofficial/videos
  9. bertus

    555 tester circuit

    Hello, The capacitor voltage should be sweeping between 1/3 Vcc and 2/3 Vcc. So in case of a 9 Volts battery between 3 and 6 Volts: Bertus
  10. bertus

    555 tester circuit

    Hello, See comments in picture: Bertus
  11. bertus

    Sony KV-8AD11 ac/dc TV power on issues.

    Hello, The size is likely to big. Rescale the picturs so that they are about 300 kB. Bertus
  12. bertus

    Connect two relays in parallel from one power source to activate a pump

    Hello, You have created an or gate using the relays. When the ON/OFF relay is activated, the timed relay will have no effect. Bertus
  13. bertus

    large dracast blew itself out and started to smell like burnt plastic- can it be salvaged?

    Hello, Wich dracast light is it? When it is a led light, it will need space for cooling. Bertus
  14. bertus

    Install Bluetooth to treadmill

    Hello, Does the treadmill have a usb port? If so, there might be a bluetooth adapter available. I know there is for some of the hometrainers. Bluetooth is likely an option: http://product.strengthmaster.com/PRODUCTS/Treadmills/TM-Series/TM5010 It does not say whether in can be adapted...
  15. bertus

    3 phase DC relay

    Hello, There is a voltage drop accross the mosfets, as they are likely not full in conduction. You might notice that the mosfets get warm when activated. Bertus
  16. bertus

    Comedy Thread

    Thanks SamR AAC
  17. bertus

    Comedy Thread

    Thanks cmartinez AAC
  18. bertus

    Comedy Thread

    Thanks cmartinez AAC
  19. bertus

    2 Q about antennas.

    Hello, To have an idea about the gain of a parabole antenna have a look at the following graph: This comes from this page of the RF cafe: https://www.rfcafe.com/references/electrical/ew-radar-handbook/antenna-introduction-basics.htm Bertus
  20. bertus

    2 Q about antennas.

    Hello, You might want to have a look in this book: https://archive.org/details/fea_ARRL_Basic_Antennas Bertus
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