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  1. bertus

    Need datasheet for what appears to be an oscillator...

    Hello, Also a picture of the top of the device is welcome. There might be an indication for the manufacturer on top. Bertus
  2. bertus

    Comedy Thread

  3. bertus

    Picture to Circuit Board coding

    Hello, Sparkfun has good quality prototyping boards in all kind of sizes and shapes: https://www.sparkfun.com/categories/149?filter_option[subcategory][]=category_301&filter_price_floor=&filter_price_ceil= For even more choices have a look at newark...
  4. bertus

    Transistor Identification help requested

    Hello, The site will accept jpg and png pictures. Images upto 300 K should be no problem. You could convert the pictures in a paintlike program. If you also want to manipulate the pictures, you could use GIMP. https://www.gimp.org/ Bertus
  5. bertus

    Wrong values from ADC Arduino - frequnecy meter

    Hello, Looking at the wave, the sampling rate is to low. Some signals have a clear peak, but some have two points at a lower value. The real peak will be between the two points. Bertus
  6. bertus

    Picture to Circuit Board coding

    Hello, There must be an production failure on the board: Bertus
  7. bertus

    Circuit Board coding

    Hello, It depends on wich side the board is flipped: Bertus
  8. bertus

    COVID-19

    Hello, We "only" got 2.4 million cases upto now: https://www.worldometers.info/coronavirus/ Bertus
  9. bertus

    Puzzled, basic flyback converter

    Hello, Can you post a complete schematic? That way we can see what you are trying to do. Bertus
  10. bertus

    Extending output cable of auto battery charger/maintainer

    Hello, Extending the cables by 3 feet, the voltage drop will be 0.9 Volts per cable so 1.8 Volts over the pair. I used this online calculator: https://www.inchcalculator.com/voltage-drop-calculator/ I used 3 feet and 12 Volts and 50 Amp (the max the charger can give). User thicker cables will...
  11. bertus

    Need help troubleshooting JVC KD-VR320 cassette tape deck

    Hello, @Bluejets , I would be carefull with chemicals like WD 40 and CRC. There might be substances in it that will dissolve plastics. I have had some bad experiences with the chemicals. At worst I have seen is that the potmeter could not be moved again. Also the carbon layer in the potmeter...
  12. bertus

    Restore/Repair and old Radio

    Hello, It could well be that the sliding potmeter is dirty with dust collected over the years. Try moving it all the way left and right for a couple of times (10 to 20) , when the radio is off. When finished, try the radio and see if it helped. Bertus
  13. bertus

    Comedy Thread

  14. bertus

    Comedy Thread

  15. bertus

    Comedy Thread

  16. bertus

    Relays

    Hello, Can you get this? Bertus
  17. bertus

    Relays

    Hello, For the 12 Volts board and the motor is also 12 Volts, the same power can be used. You can connect the 12 Volts to the contacts of the relays, to control the motor power. In post # 28 @Harald Kapp showed how to connect the motor using two relays, for bi-directional control. Bertus
  18. bertus

    Relays

    Hello, Yes. If the powersupply for the motor is separate from the 5 Volts. The 5 Volts will be used to activate the relays. The contacts of the relays may carry the 12 Volts, they are isolated from the board. Bertus
  19. bertus

    AV Receiver Power diagnosis help please

    Hello, Voltage wise, you should take a higher voltage to avoid problems. When a 10 Volts capacitor holds, there must be something else wrong. An 10 Volts capacitor on overvoltage will likely blow. Bertus
  20. bertus

    Relays

    Hello, Did you see this picture on the page you posted: On the bottom right there is the power shown for the board, wich powers the relays. Bertus
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