I2c Serial Module Appraisal

1602A LCD Screen with I2C Serial Module

This item is an electronic display module, specifically a 1602A Liquid Crystal Display (LCD) screen integrated with an I2C serial backpack module. The main component is a dark green printed circuit board (PCB) which serves as the substrate for the LCD. The PCB is rectangular with dimensions not explicitly given but appears to be approximately 3-4 inches in length. It features several solder pads, resistors (e.g., R1, R2), and capacitors (e.g., C2, C3) visible on its surface. There are also two larger black components, likely integrated circuits (U1, U2), covered in epoxy, indicative of common LCD construction for segment drivers. A prominent 'RoHS' logo is printed on the board, indicating compliance with the Restriction of Hazardous Substances Directive. Attached to the main LCD board is a smaller, black rectangular daughterboard, which is the I2C serial module. This module is clearly labeled 'POWER' and 'HW-61'. It features a main integrated circuit (IC), a 16-pin header, and a blue potentiometer for contrast adjustment. The potentiometer has a small slot for a screwdriver, indicating it's user-adjustable. Four pins are readily identifiable on the right side of the I2C module: 'SDA', 'SCL', 'VCC', and 'GND', which are standard I2C communication and power pins. The back of the main LCD is blank and not visible in the image. The overall condition appears new or lightly used, with no visible damage, wear, or repairs. The solder joints appear clean and professionally done, suggesting standard manufacturing quality. This type of module is commonly used in hobbyist electronics, prototyping, and small embedded systems due to its simplicity and small form factor.