A: All three serve the same function. The key difference is the IC used. The HW-044 uses the MAX3232 , which is the most versatile. The main difference is the operating voltage: MAX232 requires 5V exclusively, while MAX3232 can be powered by 3.3V or 5V. Since the HW-044 uses the MAX3232, it is the more flexible and modern choice.
The HW-044 layout separates the sensitive, low-voltage microcontroller logic side from the high-voltage serial line side.
Complete HW-044 Datasheet Guide: TP4056 Lithium Battery Charger Module hw-044 datasheet
Typical 300 µA, up to 6 mA during active use.
Connects to the negative power input/ground of your load/project circuit. ⚠️ Warning: Reverse polarity on the battery pins ( A: All three serve the same function
To truly understand the HW-044, you must look inside. The module contains two independent 10kΩ linear potentiometers arranged orthogonally. One potentiometer controls the X-axis, the other the Y-axis. The knob mechanically rotates both wipers as you move the stick.
The board splits its interfaces into two distinct regions for installation ease. 1. Microcontroller Side (4-Pin Header) HW-044-1 MAX3232 The main difference is the operating voltage: MAX232
Serial.print("X: "); Serial.print(xValue); Serial.print("