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  1. bertus

    Can I replace cr2032 powered devices with AAA or li ion?

    Hello, There is even 5Ah lithium batteries available: https://www.newark.com/panasonic-batteries/br-cssp/lithium-battery-3v-c/dp/15C6475 https://www.newark.com/panasonic-batteries/br-ct2sp/lithium-battery-3v-c/dp/15C6476...
  2. bertus

    Does anyone know ST62T40B

    Hello, As @Bluejets said. The dongle can be used as copy protection device. https://www.genpowerusa.com/generator-accessories/deep-sea-dse808-pc-software-configuration-interface/ It looks like an old wibu key. In my job we still use the kind of software licenses system. The old systems use the...
  3. bertus

    54.6v 2a SMPS got shorted

    Hello, As @Bluejets said, have a look at a smps repair page. This is an example of such page: http://www.repairfaq.org/sam/smpsfaq.htm Bertus
  4. bertus

    mA meter 1 day build

    Hello, The capital K is used for the kelvin temperature scale: K kelvin temperature (T) BASE UNIT See also the PDF in post # 11 The lower case k is used as prefix as 1000. Bertus
  5. bertus

    mA meter 1 day build

    Hello, Here is a practical guide to SI systems...
  6. bertus

    any users of Loomis lcd-1

    Hello, The instrument seems to be outdated. On the loomis website, there is nothing to find: http://www.loomisinc.com/products/index.html Do you have a manual? Perhaps contacting loomis will help: http://www.loomisinc.com/contact/index.html Bertus
  7. bertus

    any users of Loomis lcd-1

    Hello, I had to look it up, but it seems to be a wafer scribing tool: Bertus
  8. bertus

    mA meter 1 day build

    Hello, Here is a brochure about the SI system. Table 3 shows the prefixes again. The wiki also shows the same: https://en.wikipedia.org/wiki/International_System_of_Units Bertus
  9. bertus

    mA meter 1 day build

    Hello, Here is a list of SI-prefixes: Bertus
  10. bertus

    Requesting more Greek letters

    Hello, I made a screenshot of the symbols available at AAC: They where made available by the physics forum: https://forum.allaboutcircuits.com/threads/special-thanks-to-physicsforums-com.103761/ Bertus
  11. bertus

    Requesting more Greek letters

    Hello, I have dropped a request at the administrators ( @eerob , @eezac ). On the AAC they have a much larger set of available characters. Bertus
  12. bertus

    Help Reading Schematic on My Old Sony AM/FM Mono Radio (Leaked Battery Acid

    Hello, Here is a tutorial that shows the circuit of the output amplifier: http://ebook.chungpaemt.co.kr/AReS_EI_HTML/HTMLContents/part9/experiment9_1.html Bertus
  13. bertus

    Caps WIKI - repair old stuff

    Hello, There is also a site with a lot of information on the capacitors: http://www.iequalscdvdt.com/ There are a couple of pages about the reliability: http://www.iequalscdvdt.com/Reliability_1.html http://www.iequalscdvdt.com/Reliability_2.html Robot room has a nice page on identifying bad...
  14. bertus

    I made a celling fan winding machine but this round doing again reset i want fix turn one time set

    Hello, Please use englis over here. This is what google translated: Please help me I have some tools Arduino uno 7 segment display Relay Sensor I have code ///////////// Project: Geoprogrammer # Included "Sevasag.H" Sevasag Sevasag; Incent Button 1 = A; Incent Button 2 = A1; Int Start Button =...
  15. bertus

    Removed buzzer, space heater not working now.

    Hello, Does bringing the PCB back to the original state it back to life? Put the buzzer back and see how it reacts. If it works again with the buzzer, it needs to see the buzzer. Bertus
  16. bertus

    The best brands of drivers for LED lights

    Hello, There seem to be a lot of drivers for led street lights...
  17. bertus

    MOSFET

    Hello, As @Bluejets said, you will need a logic level mosfet. That will have a lower Vth as a standard mosfet. The resistor to ground on the gate must have a high value like 10K. The resistor in series with the gate should have a low value like 22 Ohms. Bertus
  18. bertus

    Hysteresis width of ST , power, frequency.

    Hello, Have a look at the following pages: https://en.wikipedia.org/wiki/Schmitt_trigger https://components101.com/articles/schmitt-trigger-introduction-working-applications http://hyperphysics.phy-astr.gsu.edu/hbase/Electronic/schmitt.html Bertus
  19. bertus

    NiMH battery pack mystery

    Hello, Does this article help? https://batteryuniversity.com/article/bu-501-basics-about-discharging Bertus
  20. bertus

    Building a pulse counter and generator

    Hello, The video can not be seen. There is a permission issue. I do not have and want to have facebook. I have attached a PDF that will let you understand chip interfacing. TTL and CMOS do have different levels. Bertus
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