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LM555 datasheet
LM555 General Description
The LM555 is a highly stable device for generating accurate time delays or oscillation. Additional terminals are provided for triggering or resetting if desired. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For astable operation as an oscillator, the free running frequency and [...]
555 voltage doubler
This voltage doubler produces a voltage that is twice its voltage supply. This is useful when a higher voltage level is needed out of a single lower voltage power supply. Since the current consumption levels are low in such cases, the circuit can be built with minimal resources.
The electronic circuit is basically a square wave [...]
Full duplex audio line
This full duplex audio line circuit enables two audio signals in opposing directions to flow simultaneously through a common twisted pair line. And it does that without complicated communication technology. This technique called full duplex is not really new. It is common in telephone technology. However, the telephone uses a carrier signal. This circuit on [...]
