Search results

Search Forums New Posts
  1. bertus

    How to boost 2v - 4v, 50mA - 100mA to 5v 500mA?

    hello, you can NEVER get more power out of a converter than you are putting in. bertus
  2. bertus

    DC 12 V to AC 220 V

    Hello, Have a look at the attached PDF. Bertus
  3. bertus

    Good Audio Speaker Reference Book

    hello time to close the 13 year old thead bertus
  4. bertus

    WallWart conversion...

    Hello, We do not delete threads over here. We like to have an archive of all problems and possible solutions. I will close the thread. Bertus
  5. bertus

    will wallwart blow my machine?

    Hello, Also linear power supplies are less sensitive to power dips and surges. A switched power supply may fail when a couple of power dips are seen in a short time. Bertus
  6. bertus

    WallWart conversion...

    Hello, The DO-201AD is the name of the package of the diode. It describes the dimensions of the diode. See the datasheet for more info. Bertus
  7. bertus

    What is this component please help me

    Hello, The picture looks like a RF power amplifier circuit. Do you have any schematic? Bertus
  8. bertus

    Pioneer DDJ SR - identify components

    Hello, It looks like a circuit based on a PIC chip: It looks like a sort of oscillator that is influenced bu a touch plate. Bertus
  9. bertus

    I'm a newbie woodworker. My other hobby is quantum emergence.

    Hello, As far as I know, NMR needs a magnetic field to function: https://en.wikipedia.org/wiki/Nuclear_magnetic_resonance https://chemistnotes.com/organic/nmr-spectroscopy-principle-instrumentation-application-chemical-shift-spin-spin-coupling-constant-and-integration/ The article shows Proton...
  10. bertus

    What incandescent lamp wattage to buy for PSU troubleshooting ?

    Hello, You might also find info on this SPMS repair page: http://www.repairfaq.org/sam/smpsfaq.htm More repair tips in the links of my resource: https://maker.pro/forums/resources/troubleshooting-and-repair-info-pages.68/ Bertus
  11. bertus

    What incandescent lamp wattage to buy for PSU troubleshooting ?

    Hello, The 275 Watts would only be reached at full load. With a lower load, the power will be less. You can test the powersupply with about 10 % load. That way a smaller bulb would do. Bertus
  12. bertus

    And now something weird

    An AI-powered drone tried to attack its human operator in a US military simulation The mission was straightforward: "Destroy the enemy's air defense systems." But in a recent US military test simulation, a drone powered by artificial intelligence added its own problematic instructions: "And...
  13. bertus

    Need a little help understanding the way my class AB power amplifier works.

    Hello, This combination is sometimes called a "rubber diode": https://en.wikipedia.org/wiki/Rubber_diode @tuna : You might find a lot of info in the following book: https://archive.org/details/Audio_Electronics_Transistor_Amplifiers_Design_Handbook_D._Self Bertus
  14. bertus

    Yaesu FT75 manual/schematic required

    Hello, The only page I could find is this one: http://foxtango.org/FT-75/FT-75B.htm Bertus
  15. bertus

    Electronics color code

    Hello, For resistor values (including SMD), you could have a look here: https://kiloohm.info/ Bertus
  16. bertus

    Tacx T2240 turbo trainer - blown resistor

    Hello, @73's de Edd , Sorry, but the given value is wrong. R220 will be 0,22 Ohms. See this page for more info: https://kiloohm.info/smd4-resistor/R220 Bertus
  17. bertus

    Low frequency adjustable but stable oscillator

    Hello, Australia seems to use 50Hz @ 240 Volts. Bertus
  18. bertus

    MF/HF marine radio

    Hello, What is the make and model of the radio? What does the manual tell you about the failure? Bertus
  19. bertus

    The output of IR2104 is not square wave, Ho and Lo are not square wave. When Ho is high, then Lo is also high.

    Hello, As @Delta Prime noticed, how is the scope connected to the board? Also compensation will change the shape of the wave: https://www.electronics-notes.com/articles/test-methods/oscilloscope/scope-probe-compensation.php Bertus
  20. bertus

    Testing Operational Amplifiers

    Hello, Analog has an extended page for opamp testing: https://www.analog.com/en/analog-dialogue/articles/simple-op-amp-measurements.html Bertus
Top