Photo NPN transistor 2N2222 NPN transistor and a Display number of passive circuit elements according to the light with a simple circuit to control a 5 volt relay
Phototransistor circuit diagram
Publication date: 2010/08/01 Tags: analog circuits projects, simple circuit projects
Atmel AT89C2051 Clock Circuit with LED Display
Pretty stylish digital clock circuit of the display to show information on the hours, but around kılasik made with 120 LEDs in display attracts attention also has an alarm feature.
Microprocessor AT89C2051 LED