Electronics Models for School and Collages and University

Adjustable Timer Auto Off Adjustable Timer Auto On And Gate(on Pcb) And,Or,NotAnd Gate (Simple) Automatic Street Light Clap Switch(transistor Based) Electronic Eye (ic Based) Fire Alarm(ic Based) Leter Box Alarm Musical Bell Um66(simple) Rain Alarm(simple) Solar Meter Tank Over Flow Alarm(ic Based) Touch Alarm Touch On/Off Switch (cd4011)