Search results

Search Forums New Posts
  1. bertus

    Can oscilloscopes measure circuits with different voltages at the same time?

    Hello, That is not true. A buck converter will have losses. The power out will ALWAYS be lower as the power in. The efficiency is given in a percentage. Most buck converters have an efficiency between 70 % (for a bad design) and 93 % (for a good design). Bertus
  2. bertus

    matched impedance question

    Hello, An other way to detect the light would be a light sensor like an ldr inside the fridge on long wires going outside the fridge. Bertus
  3. bertus

    Brake light strip resistor identification

    Hello, The leds look like the Vishay TLWR7600 or TLWR7900. Those leds have a maximum current of 70 mA, where the usual leds only have 20 mA. Looking at the board, it looks like 4 times 3 leds parallel in series: Bertus
  4. bertus

    brand cr2032

    One example: https://international.gpbatteries.com/products/gp-lithium-coin-batteries-cr2032
  5. bertus

    10k pot problem

    Hello, What type of potmeter did you use? Is it a multiturn from bourns? https://www.bourns.com/products/potentiometers/precision-pots-multiturn Bertus
  6. bertus

    Can a cell phone store AV data from multiple cameras?

    Hello, A "regular" usb port on a cell phone is only for charging. Depending on the model a USB-C port might support USB-on-the-go for connecting devices. Bertus
  7. bertus

    Question CR2032 battery

    Hello There is a new thread started I will close this one Bertus
  8. bertus

    Wanted: A Good Home for a Good Text Book

    Hello, I will close this thread as the TS stated the book is gone to a new home. Bertus
  9. bertus

    Doubt leak CR2032 battery

    Hello, When storing equipment for a log period, REMOVE the battery. That way the battery can not harm the equipment. It will be easy to replace the battery when the equipment will be used again. Bertus
  10. bertus

    Question SMD capacitors

    Hello, The capsite will give you a lot of information on capacitors: http://www.iequalscdvdt.com/ There are two pages on reliability. Bertus
  11. bertus

    Cuisinart SSB1U Soupmaker/blender component ID?

    Hello, The size tells you something about the power rating. It will not tell you the current rating. Also the used voltage is to be watched. Have a look at the exerpt of the littlefuse catalog I attached. Bertus
  12. bertus

    Overcloking Pi4 ?

    Hello, There are many pages about the subject. Have a look at these: https://beebom.com/how-overclock-raspberry-pi-4/ https://www.seeedstudio.com/blog/2020/02/12/how-to-safely-overclock-your-raspberry-pi-4-to-2-147ghz/ https://linuxhint.com/overclocking_raspberry_pi_4/...
  13. bertus

    Old aquarium thermostat.. How does it work?

    Hello, The sensor seems to be a bi-metal strip. It changes shape when heated. https://en.wikipedia.org/wiki/Bimetallic_strip The screw near the strip sets the temperature. Bertus
  14. bertus

    Low power cutoff not working

    Hello, How is the led powered? I do not see any power source for the led. Bertus
  15. bertus

    CMOS??

    Hello, The ICM7555 and TLC555 are also CMOS versions. Bertus
  16. bertus

    Can this ceiling fan remote be fixed?

    Hello, It looks like the fob uses RF. There is a curly trace near C13 and C14. That would be that antenna. The led only seems to be an optical indicator. Bertus
  17. bertus

    PID controller ssr exits dont show any dc voltage for the ssr

    Hello, Is there in the manual a part on output mode? There shouls be a setting to have 12 volts DC on one of the outputs for driving a SSR. Bertus
  18. bertus

    High voltage 12 volts applied to 5 volt Nixie clock - damage? Can it be fixed? ?

    Hello, As said with a schematic we can see wich parts could not handle tha 12 Volts. Bertus
  19. bertus

    extra 10 volts why

    Hello, Have a look at the attached PDF. On page 22 you will see an overview of the relation between the voltages. From page 34 you will see the effect of the capacitor. Bertus
  20. bertus

    Antenna Repair & Replacement

    Hello, The antenna seems to be build in. You could measure the length and diameter to find out wich antenna would fit in the radio. Here I found a page that shows some pictures: https://www.flickriver.com/search/Amc+radio+tf/ Have a look at walmart for telescopic fm antennas...
Top