| Altre tabs | The onboard MAX3232 chip includes a voltage doubler/inverter charge pump circuit to generate the required RS232 voltage levels from a single low-voltage supply. 3. Specifications Table Specification Module Type RS232 to TTL Converter (DCE) IC Operating Voltage 3.0V - 5.5V DC Interface TTL (GND, RXD, TXD, VCC) Connector Female DB9 Dimensions ≈ 3.2cm × 2.8cm Data Rate Up to 250 kbps (Typical) 4. Pinout and Connections
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How does the HW-044 compare to similar products? Here is a quick comparison for reference.
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The HW-044 includes two onboard surface-mount LEDs (typically Red and Blue/Green) to communicate the system state: Blue/Green LED System Status OFF Battery is currently charging. OFF ON Charging is complete; battery is fully charged. Blinking / Dim ON
Typical 300 µA, up to 6 mA during active use.
Connect an RS232 device, like a spectrometer or a cash register, to an STM32 with an SD card. The HW-044 will convert the RS232 data to TTL for the STM32 to read and log. The onboard MAX3232 chip includes a voltage doubler/inverter
This datasheet summary is for educational/hobbyist reference. For full electrical specifications, refer to the official MAX7219 datasheet from Analog Devices.
| HW-044 Pin | Arduino Due Pin | |------------|------------------| | BCLK | Pin 3 (DAC1) | | LRC | Pin 2 (DAC0) | | DIN | Pin 9 (DAC2) | | Others | Same as above |
Linear chargers drop excess voltage as pure heat. When charging at 1A with a 5V input, the TP4056 chip will get hot to the touch. Ensure the module is placed in a well-ventilated area. This link or copies made by others cannot be deleted
The architecture of the HW-044 relies entirely on the charge-pump circuitry embedded around the MAX3232 IC.
: The module uses internal capacitors to generate the ±10V swings needed for RS232 communication from a single low-voltage supply.