Circuit diagrams and schematics - Electronic projects

This be Electronic lock switch simplely. If you press switch straight follow the password that note system work LED1 stick bright or induce apply with Relay for control electric other appliances get with. By this circuit uses the integrated circuit divides by 10 model digital number CD4017. I likes to use build is fire circuit [...]

This the circuit light led flashing ,with show of 10 LED. By use integrated number circuit CD4017 perform be Decade Counter/Divider with 10 Decoded Outputs. Which it is integrated digital circuit CMOS then use the power supply about 9VDC. For a signal input continue the circuit can produce general frequency may use IC NE555 all [...]

George Katz of Balgowlah Boys high in Sydney presented a solid state oscilloscope. He says “probably the best advantage is its very small size and the fact that it can run off the power supply of the circuit being tested. Although it has a low frequency range, it can still be used for most circuits. [...]