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  1. bertus

    Ceramic Capacitors

    Hello, On the capsite there is a lot of information on all capacitors: https://iequalscdvdt.com/ Bertus
  2. bertus

    Rebuilding tube radio

    Hello, As the radio is build for 67.5 volts, capacitors of 100 volts or more will likely work. Bertus
  3. bertus

    Rebuilding tube radio

    Hello, Do you have the brand and type of the radio? There might be a schematic to be found. The powerratings for the resistors may be higher as the mentioned 1/4 watt. The size usualy shows the powerrating. See this page about size versus powerratings...
  4. bertus

    Rebuilding tube radio

    Hello, Why do you want to replace resistors? They only fail when they have to dissipate more than the powerrating. It is no problem to use resistors with a lower tolerance. It means that the resistors are closer to the mentioned value. It can be a problem when you use resistors with a higher...
  5. bertus

    Happy New Year

    Happy new year from Amsterdam, the netherlands, too
  6. bertus

    Adruino connection question

    Yes, there is extra hardware needed in the form of an audio adapter board: https://www.pjrc.com/store/teensy3_audio.html Bertus
  7. bertus

    Adruino connection question

    Hello, On an other forum i have seen that a teensy with a kind of audio shield was used for the effects. They used an audio library for it: https://www.pjrc.com/teensy/td_libs_Audio.html https://www.pjrc.com/teensy-fx-effects-unit/ https://github.com/tbitson/Teensy-Guitar-Effects-Processor...
  8. bertus

    LGS4056 Not Working

    Hello, On the temp pin there should be a resistor network with a ntc to measure the temperature of the battery. See the data sheet for all info: https://www.lcsc.com/datasheet/lcsc_datasheet_2404181122_Legend-Si-LGS4056HDA_C5124109.pdf Bertus
  9. bertus

    Component Identification and Information

    Hello, It could be that both parts are crystal filters. Why do you think they fail? Bertus
  10. bertus

    ethical hack

    Hello, Does this page help? https://www.tapatalk.com/groups/scanukfr/decoding-pagers-t45.html Bertus
  11. bertus

    Scavenging rechargeable lithium cells from the roadside

    Hello, In thrown away vapes, you can find rechargeble li-ion cells: Bertus
  12. bertus

    RING LCD torch misbehaving - is it saveable?

    Hello, You can have batteries almost for free. Many disposable e-cigarettes contain rechargable li-ion batteries. The capacity of these batteries that I found is between 500 (13350) and 1500 (22300) mAh. Bertus
  13. bertus

    Transformer overvoltage

    Hello, Using a zener in series, all current must pass the zener. Have a look at the tracking regulator on the following page: https://electronics.stackexchange.com/questions/121264/how-does-tracking-pre-regulator-work Bertus
  14. bertus

    Hi, I want somewhere to buy a set of two gears at a 3:1 ratio i.e. 60:20 teeth with a centre hole of 15mm, any ideas?

    Hello, Did you do the calculations? Engineering toolbox has a page: https://www.engineeringtoolbox.com/gear-output-torque-speed-horsepower-d_1691.html Bertus
  15. bertus

    Electronics Knowledge and Skill Level of This Forum

    Hello, You can also have a look at the education section on AllAboutCircuits: https://www.allaboutcircuits.com/education/ Bertus
  16. bertus

    Electronics Knowledge and Skill Level of This Forum

    Hello, You can also get a log of information of different levels in the resources: https://maker.pro/forums/resources/ Bertus
  17. bertus

    Electronics Knowledge and Skill Level of This Forum

    Hello, I have been busy with electronics since my youth. I have now about 50 years of experience. An other great source of information is the NEETS series, found in the archive: https://archive.org/search?query=neets+electronics+module Bertus
  18. bertus

    I need to identify this resistor in the picture can somebody help?

    Hello, You could also have a look at this thread; https://maker.pro/forums/threads/electronics-color-code.293281/ Bertus
  19. bertus

    Triggering a passive infrared sensor?

    Hello, As said a pir sensor reacts on movements. The movements are detected by a fragmented lens. Read the following article for more details: https://www.rs-online.com/designspark/engineers-guide-to-using-pir-sensors-for-highly-reliable-security-applications Bertus
  20. bertus

    Temperature Control using DHT11 and arduino

    Hello, You can stop the frequent switching by adding a hysteresis. Start the fan at 31 degrees and stop the fan at 29 degrees, as example. Bertus
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