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  1. bertus

    Charging cap with three phase

    Hello, You say you have tried several capacitors. What where the values of them? Is there a load accross the capacitor? Depending on the load, the capacitor will be drained sooner or later. Bertus
  2. bertus

    Charging cap with three phase

    Hello, What capacitor do you use? You have given no information on that. Bertus
  3. bertus

    Stumped on this circuit blinking led with 1 transistor

    Hello, Here is a page from Dick Cappels with the explanation of the circuit: http://www.cappels.org/dproj/simplest_LED_flasher/Simplest_LED_Flasher_Circuit.html Bertus
  4. bertus

    Crystal oscillator 15pF load

    Hello, With the 15 pF load, you probably mean the test circuit in the datasheet: The load is only there to show the driver capability. Measuring the output to show the rise and fall times of the signal. Bertus
  5. bertus

    Crystal oscillator 15pF load

    Hello, What schematic do you use? For what application is the oscillator? Bertus
  6. bertus

    Charging cap with three phase

    Hello, Can you measure the AC voltage between the phases? Bertus
  7. bertus

    Measuring Current via voltage measurement

    Hello, Did you read the datasheet of the device? The pages 2,3 and 4 show a lot of information about the behaviour of the device. How much current is used for the emmitor (led) ? What is the supply voltage for the transistor ? Bertus
  8. bertus

    finding 4 pin connectors for own wires

    Hello, Have a look at the power-pole connectors from anderson: https://www.andersonpowerproduct.com/ They can be stacked to any number of contacts. Bertus
  9. bertus

    Charging cap with three phase

    Hello, Have a look at this page: https://www.electronics-tutorials.ws/power/three-phase-rectification.html Bertus
  10. bertus

    Component Identification

    Hello, The EDUCYPEDIA has more pages with links on the following subjects: Audio data AWG conversion Barcode Calculators Capacitor codes Constants and tables Databank - tables Datasheets Formulas Inductor codes IP ratings Keyboard codes Resistor color code RF data Schematic symbols Science...
  11. bertus

    Improvised Alternatives to a High Voltage Probe for Oscilloscope

    Hello, @Hopup , I know the mentioned site. They also got some safety guidelines on wirking with high voltage: http://www.repairfaq.org/sam/safety.htm Bertus
  12. bertus

    Basic Pulse generation help

    Hello, That looks usable. The lower ranges can be used. Bertus
  13. bertus

    Basic Pulse generation help

    Hello, The speed versus pulses is dependend on the wheel diameter. A smaller wheel will produce more pulses as a larger wheel. Bertus
  14. bertus

    Basic Pulse generation help

    Hello, Looking at the diagram, I see a pulse of about 80 mS in the Toolsetting. This means that the pulse frequency is 1 / 80 mS = 12.5 Hz. Looking at the PCB you show, it can likely not go low enough in frequency. Bertus
  15. bertus

    Adding headphone jack on TV with isolated speaker grounds

    Hello, On question 1 : It can be that the audio output is done by a bridged amplifier to gain a higher power. On question 2 : You could use two audio transformers. Bertus
  16. bertus

    Basic Pulse generation help

    Hello, What is the variation of pulse sequence width A? It looks like you basicaly need an oscillator that creates the shape. An 555 could do that. Bertus
  17. bertus

    10.7 MHz oscillator with transistor

    Hello, You might want to try this circuit: More circuits can be found on the page where the picture came from: http://www.agder.net/la8ak/12345/n19.htm Bertus
  18. bertus

    7805 regulator capacitors

    Hello, The 26 Ohms and 180 mA do not match with the mentioned 2.4 Volts. When I do the calculations the voltage accross the resistor would be 26 Ohms X 180 mA = 4.68 Volts. I do not have an explanation why the voltage accross the resistor is 2.4 Volts. Bertus
  19. bertus

    Voltage regulator voltage too high

    Hello, Here is the mentioned picture in the datasheet about the capacitors: Bertus
  20. bertus

    Voltage regulator voltage too high

    Hello, Do you have the decoupling capacitors mounted on the regulators? Without them, the regulator may oscillate and show a to high voltage. Bertus
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