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ATLO-V1-TUYA - defective controller. Repair, do not throw away.

r3w4rd  Cool? (+14)
📢 Listen (AI):
Disassembled ATLO-V1-TUYA actuator showing main PCB with TUYA CB3S module and electronic components inside the housing. .
Hello.
I have received an ATLO-V1-TUYA actuator for repair.


It allows remote control of a water or gas ball valve (opening / closing). In order to function properly, it is necessary to connect it to a Wi-Fi network with internet access.

The fault manifested itself in a lack of control of the valve, as well as communication problems.

Time for disassembly.
After unscrewing 4 screws and removing the top cover, all the electronics are revealed to our eyes.

The interior of the ATLO-V1-TUYA actuator after removing the top cover, showing the electronic circuit boards with components. .

On the main board there is, in addition to the small parts:
- LM2596S-3.3 inverter producing 3.3V for the TUYA module and BDR6122T motor driver,
- TUYA CB3S module (quite popular lately), Mr.kaczmarek2 wrote quite a lot about TUYA on the electrode,
- the BDR6122T chip, this is the 1.8A motor driver and it was the one that failed, it heated up a lot.

There is a smaller board screwed onto the side, on which there are two limiters that turn off the motor in extreme positions.

The BDR6122T chip is quite hard to find especially on aliexpress. A bit of datasheet data:

Opened ATLO-V1-TUYA actuator with exposed internal electronics, PCB, and components visible. .
Internal view of the ATLO-V1-TUYA actuator after removing the cover, showing the main PCB and electronic components. .

I decided to find a replacement. And succeeded. The DRV8871 chip requires only one 12V voltage (the BDR6122T needs 3.3V and 12V).

Main electronic board of ATLO-V1-TUYA actuator after removing the cover, showing modules and integrated circuit. .

The current is limited by a resistor, in this case using 30k the current is 2A max. Comparing the two circuits, several leads are in the same place, after changing the polarity of course.
A bit of wireframing and you're done.

Inside view of the ATLO-V1-TUYA actuator with the top cover removed, showing the main electronics board with TUYA CB3S module and BDR6122T chip, plus a smaller board with two limit switches. .

The actuator got a second life.
About Author
r3w4rd wrote 120 posts with rating 37 , helped 22 times. Been with us since 2005 year.

Comments

bsw 03 Jul 2025 09:20

This circuit directly controls the 12V motor? It has an H-bridge in it and so on? Such a tiny thing - no wonder it overheats.... [Read more]

r3w4rd 03 Jul 2025 12:07

Yes, there is an H-bridge inside that controls a 12V brush motor. Both chips have a thermal pad, although the manufacturer did not make a pad on the PCB but the whole thing is soldermasked, the chip was... [Read more]

Duch__ 07 Jul 2025 21:02

I converted a similar one on esp12e probably. It has been running for 2 years now with supla. [Read more]

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