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  1. bertus

    FX controls Pirate cannon

    Hello, What kind of bulb did you have in mind? How many lumen would that bulb have? There are led cob chips that are high power...
  2. bertus

    FX controls Pirate cannon

    Hello, What kind of light do you intend to use for the "canon"? A DC light could be dimmed using PWM. There are also led drivers with a signal input for dimming (usualy a 0 - 10 Volts signal). Bertus
  3. bertus

    FX controls Pirate cannon

    Hello, Will the fog machine be in "standby"? As far as I know a "cold" fog machine takes some time to create a fog. Bertus
  4. bertus

    Thermal Printer Problem

    Hello, Is there info here? https://starmicronics.com/support/products/tsp100eco-support-page/ Bertus
  5. bertus

    Try to fix Electric Door bell

    Hello, As @73's de Edd said, there is most likely a transformer for the bell. I know of transformers that deliver 4, 8 or 12 Volts. There are also transformers for 8, 12 and 20 Volts. Bertus
  6. bertus

    Speed control of this circuit

    Hello, The circuit is indeed for a RC servo. It uses pulse width to control the position of the RC servo. Read this wiki page for more info: https://en.wikipedia.org/wiki/Servo_control Bertus
  7. bertus

    RC snubber circuit

    Hello, Where does the relay come in this circuit? Driving a heater (wich is resistive) with zero crossing, you likely do not need a snubber ciruit. For more info on snubber circuits, have a look at the attached application note. Bertus
  8. bertus

    The perfect remote

    Hello, @Martaine2005 , indeed the date of 1970 is unrealistic. The page shows this: Inventors: Johnson, Ron (Jefferson, LA, US) Application Number: 16/115546 Publication Date: 02/28/2019 Filing Date: 08/28/2018 Bertus
  9. bertus

    Wien bridge with 120MHz frequency

    Hello, As @Alec_t said, you will need a faster opamp. A wienbridge oscillator works at a gain of 3. The opamp needs to be able to provide that gain. I would recommend an opamp with a GBW of minimal 500 MHz. I also would say that a wienbridge oscillator at 120 MHz using opamps is unrealistic...
  10. bertus

    And now something weird

    23 lenses:
  11. bertus

    Get oscillator

    Hello, You could have a look at this circuit and adapt the frequency: https://www.researchgate.net/figure/Circuit-diagram-of-MOSFET-based-oscillatory-circuit_fig3_332332621 Bertus
  12. bertus

    Suggestions for winter electronics projects wanted

    Hello, Perhaps you can find some ideas for arduino train projects over here: https://create.arduino.cc/projecthub/projects/tags/trains https://arduinorailwaycontrol.com/ Bertus
  13. bertus

    Suggestions for winter electronics projects wanted

    Hello, An other sound project would be the weird sound generator from Music from outer space: http://musicfromouterspace.com/index.php?CATPARTNO=NONE&PROJARG=WSG2010%2Fwsg_page1.html&MAINTAB=SYNTHDIY&SONGID=NONE&VPW=1590&VPH=575 Bertus
  14. bertus

    Tweaking an analog VU panel meter ?

    Hello, An analog VU meter is most times in the range of 200 uA. Read this page for more info: https://www.giangrandi.org/electronics/vu-meter/vu-meter.shtml Bertus
  15. bertus

    PERF BOARD!!

    Hello, This is stated as holes only: https://www.amazon.com/84P44WE-Vectorbord-General-Purpose-Prototyping/dp/B00B88D7Q2 Bertus
  16. bertus

    Thought for the day .....

  17. bertus

    Suggestions for winter electronics projects wanted

    Hello, Do you mean this kit? https://www.joom.com/nl/products/5f2134b39ec1350106b70de2 Looking at the picture there is a little PCB with a COB (chip on board) on it. Bertus
  18. bertus

    Suggestions for winter electronics projects wanted

    Hello, Here is an other fun organ: It comes from volume 4 of the Graf circuit encyclopedy books: https://archive.org/details/folkscanomy_electronics?query=graf&sort=-publicdate Bertus
  19. bertus

    what mosfet to use for an induction heater

    Hello, One might want to read this page about the effect of the frequency on the heating properties...
  20. bertus

    I need firmware of this router. If someone could help me out, it would be greatly appreciated.

    Hello, There is not much info on the aliexpress site: https://nl.aliexpress.com/item/32959432813.html On youtube there is a setup: Bertus
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