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  1. bertus

    Easy pulse generator

    Hello, Have a look at this page: https://www.bristolwatch.com/ele2/sn7414_pulser.htm Bertus
  2. bertus

    Easy pulse generator

    Hello, How about a RC circuit with a schmitt trigger gate. Bertus
  3. bertus

    Easy pulse generator

    Hello, Is this homework? Bertus
  4. bertus

    Possible to control resistance using microcontroller?

    Hello @Harald Kapp , in his openings post the OP mentioned that he wants to have a wider range of intensities than the provided ones in the MAX Using the resistor control a wider range should be possible Bertus
  5. bertus

    Possible to control resistance using microcontroller?

    Hello, The 10K is there to ensure the transistor is turned off. Bertus
  6. bertus

    LM3886 amp build

    Hello, Can you post the used schematic? That way we can see what is going on. Is it the one in the attached PDF? Bertus
  7. bertus

    Possible to control resistance using microcontroller?

    Hello, You could try something like this: Bertus
  8. bertus

    Possible to control resistance using microcontroller?

    Hello, @PETERDECO , PWM on the common pin of the display will not work, as the driver is multiplexed. @magic-smoke , you could use PWM on the transistor that controls the current. Bertus
  9. bertus

    433 MHz Single channel transmitter and receiver

    Hello, The modules are "dumb" modules and the transmitter will sent a signal when the input is high. The receiver will have a high output when the transmitter is active and follow the signal pattern. The units are using OOK (On-Off_Keying) for sending the information. BTW I do not answer in...
  10. bertus

    Computer power supply question

    Hello, As @dave9 said, a 24 Volts power adapter will be more easy: https://www.newark.com/xp-power/ves120ps24/adaptor-ac-dc-24v-5a/dp/98Y4022 Bertus
  11. bertus

    And now something weird

    Boston dynamics versus rolling stones:
  12. bertus

    Computer power supply question

    Hello, As the -12 Volts is only 1 Amp, you can have a max load of 1 Amp, so 24 Watts. Bertus
  13. bertus

    RC4558P opamp replacement

    Hello, The RC4558P is available in your region: https://hk.element14.com/texas-instruments/rc4558p/op-amp-dual-gen-purpose-4558-dip/dp/3117715?st=RC4558P When replacing it, you could use a socket, so you will have to solder once...
  14. bertus

    Differerntial demodulation using single-stage opamp and LPF.

    Hello, Your very dark schematic is very hard to read. I have inverted the colors so it is a bit better to look at: Bertus
  15. bertus

    Canon Camera battery help

    Hello, From the last picture, I would say, that it can be dangerous. When the Lithium battery heats up, it may catch fire. Bertus
  16. bertus

    power supply troubleshooting

    Hello, What are you using as load for the powersupply? It sound as if the current limiter is kicking in. Bertus
  17. bertus

    Lead-acid charger

    Hello, There are many schematics for lead acid chargers on the internet. From very simple to very advanced: lead acid battery charger schematic Bertus
  18. bertus

    EP5R marking

    Hello, Do you have a picture of the part? How many connection points are there? The XR9259 has 8 connection points. It could be the other characters are a production code. Bertus
  19. bertus

    And now something weird

    Hello, This site has some weird motorcycle projects: https://www.rotecaerosport.com/motorcycles Bertus
  20. bertus

    EP5R marking

    Hello, Could it be a buck DC-DC converter: https://www.torexsemi.com/file/xc9259/XC9259.pdf The partnumber was found through this page: https://smd.yooneed.one/code4550.html Bertus
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