Hand-solderable 9V battery-powered red LED blinker using a 555 timer in astable mode, an on/off switch, and through-hole support co... show moreHand-solderable 9V battery-powered red LED blinker using a 555 timer in astable mode, an on/off switch, and through-hole support...
Rainbow is a pet collar project that would be programmed to send its location alerts whenever your pet is out of a predefined geof... show moreRainbow is a pet collar project that would be programmed to send its location alerts whenever your pet is out of a predefined...