Here is a simple general-purpose security alarm circuit built on the Arduino ... Components R1 (100R) is added to limit the operating current of the LCD backlight unit, and P1 (10K) is the display ...

If you’ve been pining for a retro-chic 16×2 LCD display to enhance your Windows computing experience, then [mircemk] has got you covered with their neat Windows-based LCD Info Panel. You… ...