Hw-044 Datasheet Jun 2026

The HW-044 board features two primary connection sides: the input power side and the battery/load side. Understanding these connections is critical to avoiding permanent damage to the module or the battery. Input Connections

The most frequent error when setting up the HW-044 is mapping TX to TX and RX to RX. Always remember: the module's TXD pin outputs information out of the module into the microcontroller, meaning it must wire directly into your host device's RX pin.

Using the HW-044 with a microcontroller like Arduino is straightforward. Connection Diagram (Arduino to PC) → Arduino 5V HW-044 GND → Arduino GND HW-044 TXD → Arduino RX (Pin 0) HW-044 RXD → Arduino TX (Pin 1) DB9 Connector → Serial Port of PC. hw-044 datasheet

The HW-044 is an excellent, affordable, and easy-to-use logic level converter for hobbyist and prototyping projects. It shines in mixed-voltage systems where multiple bidirectional signals (like I²C, UART, or GPIO) need translation between 3.3V and 5V. While not suitable for very high-speed applications, it is more than adequate for most sensors, displays, and microcontroller communications.

user wants a long article about the keyword "hw-044 datasheet". I need to follow the search plan to gather information. The first round involves searching for the general product category, specific part number, possible alternatives, related pages, and documentation sites. I will execute the searches as per the plan. search results show multiple possible identities for "HW-044". The most likely from an electronics perspective is the RS232 to TTL converter module based on the MAX3232 chip. There are also references to a desk lamp and a terminal header. The search plan suggests verifying whether a datasheet exists and identifying the specific product. I should open the most promising pages to gather more details. search results show multiple products with the "HW-044" identifier. The most relevant from an electronics perspective is the RS232 to TTL converter module. The article should focus on this module, providing a detailed datasheet, specifications, application guide, and usage instructions. The search plan's second round would involve searching for MAX3232 details, alternative RS232 to TTL modules, and Arduino connection tutorials. I will now proceed with the second round of searches to gather additional technical details. search results provide a wealth of information about the HW-044 module, its specifications, applications, and comparisons. I will now structure the article. The article will cover an introduction, technical specifications, pinout description, application examples, programming and code, hardware and alternative options, MAX3232 vs MAX232, frequently asked questions, and resources. I will cite the relevant sources. term HW-044 can refer to several completely different products, including a desk lamp, a healthcare form, and even decorative nails. However, in the world of electronics and embedded systems, . The HW-044 board features two primary connection sides:

+---------------------------+ | HW-044 MODULE | | | [ MCU TTL SIDE ] | +---------------+ | [ RS232 SIDE ] (3.3V / 5V) | | MAX3232 IC | | (±12V Signal) | | | | VCC ------------+---->| VCC | | GND ------------+---->| GND | | MCU_RX <-----------+-----| T1OUT R1IN |<----+------- DB9 Pin 2 (TXD) MCU_TX ------------+---->| T1IN R1OUT |-----+-------> DB9 Pin 3 (RXD) | +---------------+ | DB9 Pin 5 (GND) +---------------------------+

: Dimensions are approximately 31.5 x 29 x 14 mm , designed for easy integration into tight spaces or projects. Always remember: the module's TXD pin outputs information

The HW-044 is a widely used, low-cost electronic module designed to manage the charging and protection of single-cell Lithium-Ion (Li-Ion) or Lithium-Polymer (Li-Po) batteries. It is most commonly built around the TP4056 linear charging IC and the DW01A battery protection IC, making it an essential component for DIY electronics, portable devices, and robotics projects.

Vout = (R_wiper / R_total) * VCC

If the battery voltage drops below 2.5V during use, the DW01A cuts off the path to OUT- , protecting the battery from permanent degradation.

Use short, thick wires between the module and the battery to avoid voltage drops, which can cause premature charge termination. To help tailer this to your project, let me know: What battery capacity (mAh) are you planning to charge? Will your project draw power while the battery is charging ? Do you need assistance calculating a custom resistor value ? Share public link