At first glance, it looks like just another generic breakout board. But if you try to search for an official "HW-133-v1.0 Datasheet," you might hit a wall. Why? Because the "HW" prefix usually points to a hardware reference design rather than a proprietary chip.
The Hw-133-v1.0 typically separates into two boards: the (exposed copper tracks) and the control board (LM393). The control board has a 4-pin male header. Hw-133-v1.0 Datasheet
Have you used the HW-133 in a unique project? Let us know in the comments below! At first glance, it looks like just another