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HackoBoy

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Posts posted by HackoBoy

  1. I found the problem quite by accident
    When the problem came, I measured the voltage of the lm7812 - input and output = 0 volts.
    I started measuring with a multimeter and pushed the electrolytic capacitors and other elements - and when I pushed the fuse housing that is mounted on the circuit board - the test started.

    It turned out to be a bad solder, and during the vibrations from the low-frequency speakers - it breaks.
    I will resolder the fuse contacts tomorrow.

  2. Hello
    There is no one to help in my town.
    I have a demo stand for car players and speakers.
    After it turns on and works after hours or minutes - it blocks.
    There are several boards mounted in the rear end and with the help of non-retentive buttons I select a player and a speaker. The indication works as well as the relays.
    After it freezes - nothing works and the only option is to turn it off and on.
    Sometimes when turning on USB memory, or as the selected player plays.

  3. no.
    In this file ( who i downloaded  before days ) i do not see how this 8 x 6 V Batteryes  will be conected with cable and 9 pin connector . .
    In my case i have 9 wire on this connector . 
    3 from them - connected  to Positive end from Battery pack 
    3 from them - connected  to Minus from Battery  pack.
    This wire connected to power inverter MOS Transistors 

    1 wire - connected  to chassis of UPS
    Have 2 wire - who connected to pcb up to  transistors , resistors , diodes , CPU ) 

     

    It is possible with these two wires to feed the electronics that command the mos transistors and do not know what voltage it should be.
    That's why I was hoping for this scheme - to see at certain points what I should have

  4. Hello

    I have this UPS - without battery pack and external cabble with 9 pin molex mlx.

    I need the circuit to know how to connect the batteries. Because with this connector I have cables from the battery (I suppose is for 48 volts) I have the power cables to the transistor switches but I have 2 cables that go to the electronics that drives the power part.

  5. Hello guys
    I have one request.
    I bought a hot air station .This device - at a low price - where the main role for the job is using a microcontroller  HR7P169
    There is a connector option on the PCB and I suppose it is for reading and overwriting. After the station for me was 30 euros and the microcontroller for almost 2 euros.
    What will be needed to try reading the code and having it as a file

    this device is powered directly to the electrical outlet to the white connector, and when I set the temperature, I see the heater flashing differently according to the temperature and the power of the air jet.
    When placed, the stand stops heating and only blows while it is needed or if it reaches 100 degrees and shuts downHTB149twMNnaK1RjSZFtq6zC2VXa8.jpg

    Chips using in this device :

    Upper left -> Eastsoft HR7P169BFGTF 

    Upper right  -> F7103

    in the middle on pcb -> LM358

    in the  below the transformer -> PN8370

    Using moc3023  who the control bta12/800A

    IMG_20190606_230040000.jpg

    IMG_20190606_231235488.jpg

  6. Hello
    I have an idea, but I do not know how.
    I noticed that the charger for my phone if the phone is not turned on to charge - it does not consume anything. But when I turn on the micro usb connector - then begins to consume.
    Now fit a box that will convert unbalanced audio signal into balanced. But the transformer can not fit in the box of the device and the target mount it in an external box. I do not want a permanent transformer is plugged in.

  7. Hello, everyone
    I need your help to assemble charger for lead-acid battery charger .
    I have a ( 6 volt 12ah )battery which was forgotten and for many months and he had died . Added  distilled water and got her back to life with the ordinary  charger. But inside  I see white crystals and need scheme for desulfator charger  ..
    On the Internet there are many schemes but do not know which of all

     

    What I would like to have the scheme is to control the charging current and switch 6 or 12 volts.
    For now that I have is 6volta 12 AH , but may in the future I need for larger or smaller as capacity.

     

  8. In test this transformer give :
    Without load - 24 volts.
    50 watts under load -  voltage drop of 23 volts
    85 watts under load -  voltage drop of 22 volts

    The stand of the soldering iron was not very stable -  - one time is fixed and sometimes not :)
    after  few hour the end result satisfies me 100%.

    And later i will add digital thermometer and will fit bottom the key -> information about the current temperature - information coming from the sensor heater

    I apologize for the quality of the photos - and if someone does not like manufacturing. But I'm satisfied.


    2014_12_01_15_24_59.jpg

    2014_12_01_15_25_21.jpg

    2014_12_01_15_25_33.jpg

    2014_12_01_15_26_07.jpg

    2014_12_01_15_39_35.jpg

    2014_12_01_15_39_48.jpg

    2014_12_01_15_40_02.jpg

    2014_12_01_15_40_29.jpg

  9. hello
    I found a circuit filled with ICL7107 and 3 1/2 7seg led  display



    After simulation in the program " Proteus 8 professional " - i see the circuit  work well .
    After simulation in Multisim scheme soldering station controller
    -> It see - out from IC2C - Vref that about 500mV
    and the output from  IC2B - voltage varies - from 213mv to 500 mv .
    when i build in box - i upload pics . :)

  10. hello
    First, I apologize that my English is not very good and at times I use google translator :)
    But most of them understand words

    I decided to buy a soldering station, but those who themselves control the temperature sensor and heater use - were quite expensive in my city.
    After reading information on the internet - I saw that they are working on 24 volts.
    I had an old transformer - which I rewound the throttle from a street lamp - and has output parameters:
    no load at the output 25.4V  After turning on the car lamp series connect  40 watts + 45 watts = voltage is 23.4 volts - the current in the lamp is 3.8A.
    Once convinced that the transformer does not hum and gives a current that I need - I decided to use it. Maybe the voltage is slightly below the required 24 volts, but it will do the job
    I liked the  controller Hakko 936 - that no digital thermometer for temperature visualization.
    After I saw pdf  - I thought it might add thermometer.

    Give advice if possible.
    schemes applied to the controller which costs $ 13

    http://www.mmccs.com/mmarc/n0ss/hakko_936_schem-pcb_%26_mod_v1r7.pdf

    After the thermocouple - signal is amplified by IC2D and IC2A and feed triac driver -> IC1 turning the triac.    Something like a comparator - am I right or not ?
    If I take the amplified signal from the thermocouple by foot "pin4  IC1"  if there will be a disruption in the operation of the scheme.

    I found two schemes thermometer - but if you can give me a better option.
    1:  http://vrtp.ru/index.php?act=categories&CODE=article&article=2137
    2: http://www.299792458.ru/news/2010-02-28-14

    translate from RUS to ENG
    1: https://translate.google.bg/translate?hl=bg&sl=ru&tl=en&u=http%3A%2F%2Fvrtp.ru%2Findex.php%3Fact%3Dcategories%26CODE%3Darticle%26article%3D2137
    2:https://translate.google.bg/translate?sl=auto&tl=en&js=y&prev=_t&hl=bg&ie=UTF-8&u=http%3A%2F%2Fwww.299792458.ru%2Fnews%2F2010-02-28-14&edit-text=

    But if you can offer me icl7107 scheme to 500 degrees Celsius - I would be grateful

  11. hello
    I decided to assemble a simple scheme color organ  - only miss one audio compressor  into  circuit diagram  :)
    Can you help me with a diagram - signal i will take it from the output of the sound card on my computer.

    http://radio-stv.ru/?page_id=1942

    lamp H1 = up to 100 Hz
    H3 = from 100 Hz up to 1 kHz
    H4 = from 1 kHz up to 3 kHz
    H2 = from 3 Khz to maximum freq.

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