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  1. bertus

    Circuit does not simulate

    Hello, Have you set the power for the PIC in the simulator? Bertus
  2. bertus

    Stage Line 500W amp repair project

    Hello, You can shrink the photos to a size of about 100 kB. Then you can upload the photos to the forum using the "Upload a File" button. Bertus
  3. bertus

    Texas Instruments Speak & Math freezing

    Hello, The wiki tells me that a VFD is used: https://en.wikipedia.org/wiki/Speak_%26_Math I also found a page with some inside pictures: http://experimentalistsanonymous.com/diy/Schematics/Circuit%20Bending%20and%20Modifications/ Bertus
  4. bertus

    How find the address of ptz camera

    Hello, The process that @Frankchie and @Harald Kapp mention is the DHCP process: https://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol The IP address is coupled to the MAC adress of the device. When the device is coupled again to the network, the MAC address will be checked and the...
  5. bertus

    Help with LCD 4 digit display

    Hello, It looks like that C2003 is a decoupling capacitor. One of the failure modes of a tantalium capacitor can be a short circuit. Measure the voltage over the capacitor and see if it is around the 10 Volts that is coming in via the 100 Ohms resistor. You can replace the capacitor with a...
  6. bertus

    Help with LCD 4 digit display

    Hello, @Martaine2005 , Have a look at step 6 for the tantalium color code on the following page: https://www.instructables.com/From-Resistors-to-ICs-Color-Codes/ I mentioned the site also in this thread here: Electronics color code bertus
  7. bertus

    Help with voltage step-down (I am very much a beginner)

    Hello, The pictures don't show. Shrink the pictures to about 300 kB and post them over here using the "Upload a File" button. Bertus
  8. bertus

    Help with LCD 4 digit display

    Hello, Have a look at this video: Bertus
  9. bertus

    I need a certain usb-c pd board that can supply 25 volts and 3.3 amps or more.

    Hello, Your requirements fall outside the USB power standard: https://en.wikipedia.org/wiki/USB You could use a step-up converter from the 20 Volts. Bertus
  10. bertus

    CostCo Christmas Tree Transformer Replacement

    Hello, The adapter hold information on polarity: With this information, you can replace the plug with a fitting counter plug. Bertus
  11. bertus

    Help with LED circuit

    Hello, Did you cut some traces? Bertus
  12. bertus

    Converter output

    Hello, It could be a problem of the converter: https://www.electronicspoint.com/forums/threads/help-with-magnetek-model-6415-power-converter.269087/ The output will likely not be stable without a battery, as I read it in that thread. Bertus
  13. bertus

    Converter output

    Hello, Do you have details on the converter and the mini dc meter? Bertus
  14. bertus

    Comedy Thread

    Found at AAC:
  15. bertus

    small NiMH battery charger. is it possible?

    Hello, @Martaine2005 , the image does not show. It seems to be from this page: https://www.ebay.co.uk/itm/252804309711?ul_noapp=true The shown charger is for 1 NiMH, the TS wants to charge 2 NiMH batteties. This is one for 1,2 or 3 NiMH batteries...
  16. bertus

    How find the address of ptz camera

    Hello, That is the problem with products bought at Aliexpress. Is there ANY documention with the camera delivered? The seller likely does not even know what he is selling. He just wants to make profit. Bertus
  17. bertus

    Heathkit AR-15

    @Ylli , The power seems to be there. Even the 27 Volts.
  18. bertus

    Fault in MIC29302UW(MIC29302UW is not giving correct output)

    Hello, The feedback resistors have a much to high value. The minimum load for the MIC2930X is 7 mA: What is your load current? The package allows a smaller current: Bertus
  19. bertus

    Is it safe to splice these two power cords?

    Hello, Perhaps you could use a power splitter like in this: https://www.amazon.com/Cablelera-Power-Extension-Splitter-ZWACPQAG-14/dp/B00FRODUR4/ref=sr_1_2?crid=1OW8SHK4BB9IJ&dchild=1&keywords=power+splitter&qid=1608117288&sprefix=power+sp%2Caps%2C265&sr=8-2 Bertus
  20. bertus

    Resources for Fast Circuit Design for Signal Timing

    Hello, For digital circuits there is the old ECL series. On this page of the-eye there are some ECL books: https://the-eye.eu/public/Books/bitsavers.org/bitsavers.informatik.uni-stuttgart.de/components/fairchild/_dataBooks/ Bertus
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