These devices works off 240V AC.

I was looking to convert them to run off DC and keep the grid connect app function.


I don't really want to play with live AC so any help would be good.

As far as I can, see U2 drops around 320DC to 6.5DC but I don't understand were to next. The LEDs seem to run at 40-50VDC on dimmer.

Right now I am hoping to understand a schematic just get it to power on by DC to the network, then maybe use the output to do something different.

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  • 2
    \$\begingroup\$ so, what is your question? ... this is a Q&A site, not a brainstorming forum \$\endgroup\$
    – jsotola
    May 25 '21 at 8:09
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    \$\begingroup\$ Welcome to EE! If you can ask a specific question we’ll be happy to try to answer it. The more information you can provide the better. \$\endgroup\$
    – Frog
    May 25 '21 at 8:31
  • \$\begingroup\$ what are the markings on the green and brown capacitors? \$\endgroup\$
    – Jasen
    May 25 '21 at 8:42
  • \$\begingroup\$ What voltage DC? I’ve measured the voltage some time ago but all I can remember is that it not 12V. Something like 30V. I can measure it later and report back. \$\endgroup\$
    – Kartman
    May 25 '21 at 8:44
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    \$\begingroup\$ The lamp will happily run off DC out of the box - 300V DC. \$\endgroup\$
    – Kartman
    May 25 '21 at 11:16

The leds are usually run as a long string - you can determine this by using a multimeter to beep out the leds. Count how many leds are connected in series. Times that by around 3V gets you the required DC volts the led string needs. The led board might have a constant current driver chip that modulates a high DC voltage for the led string. The tuya module just outputs pwm, so you can get a mosfet or led driver for a 12V led (i assume you want 12V) and have it switch the pwm. The tuya module needs 3.3V.

  • \$\begingroup\$ at this point i would just like to power the board and see it on the network. i dont necessarily want to drive LEDs with it , but maybe use the output for something with the stock app \$\endgroup\$
    – lara
    May 25 '21 at 13:34
  • \$\begingroup\$ @lara you could just pull the module off the board and make your own circuit then. Or flash it to tasmota an open source multi function firmware with lots of automation options. \$\endgroup\$
    – Passerby
    May 25 '21 at 16:22
  • \$\begingroup\$ @lara, as I’ve said before, run the the module from a 3.3V power supply or get the downlight I mentioned that has an isolated power supply so you can fiddle with the module without getting electrocuted. Other options are to get a esp8266 board that you can plug into USB and load the tuya code onto it (i do the opposite- i remove the tuya code and load tasmota). Nevertheless, the tuya module is documented and been hacked extensively. \$\endgroup\$
    – Kartman
    May 25 '21 at 19:47
  • \$\begingroup\$ yes... the whole point of this post is how to run off 3.3v again....i dont was to change the software i want to use the grid connect app \$\endgroup\$
    – lara
    Jun 2 '21 at 10:44

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