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  1. bertus

    help with dynamo on treadmill.

    Hello, I think the big white thing is a power resistor / heater. Bertus
  2. bertus

    Improve flat screen TV sound.

    Hello, Wich brand and type is your TV? Perhaps there are some adjustments that can be done through the menus of the TV. When we know the brand and type, we can also see the connectivity of the TV. Bertus
  3. bertus

    TTP223 Touch IC

    Hello, The attached datasheet shows all versions of the TPP223 with the description on the working. Bertus
  4. bertus

    TTP223 Touch IC

    Hello, The following page shows more info on the sensor: https://www.sunrom.com/p/capacitive-touch-module-ttp223 Bertus
  5. bertus

    Graphic equalizer

    Hello, In the PCB drawing JW494 is ground. It is also connected to pin7 of IC700. Bertus
  6. bertus

    Graphic equalizer

    Hello, I would take the same values as C701 and C751, wich are 10 μF / 50 Volts. Bertus
  7. bertus

    Graphic equalizer

    Hello, Looking at the schematics IC400 is the selector and IC700 is the power amplifier. The volume control is done inside IC400. You could likely put the EQ in between: I have marked the output of the selector, the channels and the input of the power amplifier. Put some capacitors on the...
  8. bertus

    Machine 5 position selector switch

    Hello, That capacitor can be used for both AC and DC. Bertus
  9. bertus

    Machine 5 position selector switch

    Hello, The picture shows a 47 nF 400 Volts capacitor. This is a modern version of the capacitor: https://www.rapidonline.com/suntan-ts02002g473ksb0d0r-0-047uf-400v-10-metal-poly-capacitor-10-4166 Bertus
  10. bertus

    Gpu and high power requirements.

    Hello, @ratstar , Perhaps you should take a dive into the electronics basics: https://www.allaboutcircuits.com/textbook/ Bertus
  11. bertus

    Speaker & Amp Impedance Question

    Hello, When you put a 4 Ω resistor in series with a 4 Ω speaker, half the power will be dissipated (turned into heat) in the resistor as @Harald Kapp said. Where would the power that goes into the resistor otherwise go? Bertus
  12. bertus

    Speaker & Amp Impedance Question

    Hello, The resistance will measure an other value than the impedance. You are right about putting 2 times an 8 Ohm speaker will result in a 4 ohm load for the amplifier. Some bigger speaker boxes can have 2 times 8 Ohms speakers parallel to create a 4 ohms box. Bertus
  13. bertus

    Cooktop Igniter

    Hello, Sparkfun also sells them: https://www.sparkfun.com/products/10234 It is without the box that @Bluejets showed. You could have a look wich has a better way of mounting. Bertus
  14. bertus

    connect high power signal to oscilloscope?

    Hello, Show a drawing / picture of the intended setup? Where do you want to measure? A scope will see the voltage. bertus
  15. bertus

    555 astable timer to h-bridge for 2 channel christmas led lights

    Hello, @AnalogKid , Will there be a constant current flowing through R2 and R3, draining the battery faster? Bertus
  16. bertus

    555 astable timer to h-bridge for 2 channel christmas led lights

    Hello, You could make the first 555 circuit simpler by using a hysteretic 555 circuit: https://www.allaboutcircuits.com/textbook/experiments/chpt-8/555-hysteretic-oscillator/ That will have an almost 50 % duty cycle. Bertus
  17. bertus

    Storz & Bickel Plenty Vaporizer Circuit Repair

    Hello, I would never bypass a thermal protection. When it is bypassed and the thermostat fails short, a fire will likely happen. Bertus
  18. bertus

    Henri Abrahams astable multivibrator

    Hello, Have a look at the following sites: https://www.electronics-tutorials.ws/waveforms/astable.html https://electrosome.com/astable-multivibrator-transistors/ https://www.build-electronic-circuits.com/astable-multivibrator/ Bertus
  19. bertus

    Replace blown component makita radio dmr104

    Hello, The B1143 is an 2SB1143. Bertus
  20. bertus

    Difference between the following faculties?

    Hello, Have a look at this resource: https://www.electronicspoint.com/forums/resources/electronics-tutorial-books.79/ There are some of the NEETS series about different sections. Bertus
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