Straight 3 pin 5mm 3-pin Pitch 5mm 15A 1.5 300V Screw terminal block 01x03 #screwblock #connector #commonPartsLibrary

Compact USB-powered desktop CO₂ air quality monitor using an NDIR CO₂ sensor, microcontroller, OLED display, and visual good/moderate/poor status indication.

Hand-solderable 9V battery-powered red LED blinker using a 555 timer, on/off switch, through-hole passives, and a PP3 battery holder.