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This handy little circuit can tell the difference between darkness and light, making it very useful for switch......
Egor! Come quick! A storm approaches!Here is a VLF receiver tuned to 300 kHz designed to detect the crackle of......
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This simple circuit using a single transistor turns ON the relay when light falls on the LDR.The potentiometer......
The circuit described here is that of a metal detector. The opera- tion of the circuit is based on superhetero......
dolphin 2012-11-22
dolphin 2012-11-22
dolphin 2009-08-25
dolphin 2009-08-25
