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  1. HarryA1

    UPS MGE PULSAR ESV 22+

    You could  ask for help finding a  schematic here - maybe helpful: http://www.fixya.com/support/p143760-mge_pulsar_evolution_2200_esv22_ups Good luck.
  2. HarryA1

    UPS MGE PULSAR ESV 22+

    the manual is here if that is helpful: https://www.manualslib.com/products/Mge-Ups-Systems-Pulsar-Esv-22Plusrack-1938198.html
  3. HarryA1

    spam prevention?

    If you open the register page and right click on the page and select "view page source" you see the html code that makes that page. If you search on that code for: "form_q_and_a" you will find the block of code that renders that area on the page.(in firefox search by ctrl+ f) and that contains...
  4. HarryA1

    Request help for college project

    In the world of electronics what is a "landing deck"? I only know of landing decks on aircraft carriers and at the foot of stairs. I am guessing it is where you "land" your cell phone.
  5. HarryA1

    spam prevention?

    Can the bad guys login via "Sign in with Twitter or Linkedin"   or  Anonymously thus avoiding the question?
  6. HarryA1

    HELP with Schematics for magnet launcher

    To start with those capacitors are 4700 microfarads (not 4.7) at 400 volts, not cheap. The resistors are 50 watt resistors. I would think the yellow leads on your transformers are taps, here unused. If you connect two of the output black wires together and measure the voltage across the other...
  7. HarryA1

    spam prevention?

    Something like what is the:  "unit of capacitance"a five letter word". It is only a slight inconvenience at most for real people plus they only have to do it once. I set up a forum earlier this year and asked the local padding group if they wanted to use it but they decline. I did not do...
  8. HarryA1

    spam prevention?

    I think your registering question is weak. I would ask a question that requires a Yahoo search. Perhaps the spam computers could not do that. Like what is Pi to the 6th decimal place? 
  9. HarryA1

    spam prevention?

    Why don't you all use the spam prevention tools? https://invisioncommunity.com/features/spam/ On my forum one must answer a question that any kayak or canoe paddler would know to register. Got read of the damn Russians!
  10. HarryA1

    12v 3000w inverter repair help

    Without a circuit diagram it is very difficult to help you.  You can find numerous videos on youtube.com related to "EGS002 "   that maybe helpful. Good luck. Looks like I was born under the sign  -V  (I talk to much?)
  11. HarryA1

    Help Required -Timing System RS232 to Analog Conversion

    Hello, You could use a rs232 to ttl  converter  that you could connect to an Arduino microprocessor, You can get the converter for 1$, Arduino from 10$ to 30$ depending on the quality you want. Also you need a power supply about 10$ and a relay about 5$,  Plus connectors. see...
  12. HarryA1

    Ac circuit bta41 self triggering

    Your circuit is basically incorrect. The DIAC , labelled TRIAC1, would never carry the load in that type of circuit! Only the gate current for the TRIAC. see the circuit at: https://www.electronicshub.org/simple-fan-regulator-circuit/ for example. Good luck.
  13. HarryA1

    Help for read MCU HR7P169 ( from my Hot air soldering station )

    As only the CPU has access to the flash memory I would think it would not be possible to access the code. If it were on a separate chip you could read it with the right equipment. It may be better to develop your own code rather then try to reverse engineer  this device. chip you
  14. HarryA1

    Need Heaphone/Mic Amp Circuitry

    If you look around on ebay or amazon.com for "audio amplifier board 5 volts" you may find something that would be helpful. Like: Icstation PM2038 2X5W stero audio amplifier board 5v USB powered adjustable volume. They are quite inexpensive...
  15. HarryA1

    BMS Charger for 18650

    BMS 18650 chargers are  quite inexpensive off Ebay if you are not big on rolling your own...
  16. HarryA1

    Speed controller for AC Servo Motor - help

    If you search on YouTube for " 3 phase electric motor control" you may find some information that maybe helpful.
  17. HarryA1

    Rc car

    Perhaps the chip is over heating with to much current draw?  Try connecting only two motors to see what happens. For the l298n chip itself: For the IO Peak Output Current (each Channel)        – Non Repetitive (t = 100ms)            3.0A –Repetitive (80% on –20% off; ton = 10ms)    2.5A –DC...
  18. HarryA1

    RLC circuit

    I do not see your question; perhaps I am missing something :huh:
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