This project is used as an electronic private exchange. It has two telephones, which have the...
This circuit uses the versatile MAX038 function generator. Although in this circuit some of the...
The µA2240 consists of four basic circuit elements: (1) a time-base oscillator, (2) an eight-bit...
This electronic motor-speed control circuit is designed to operate in an electrically noisy...
A quad op amp makes up the heart of this function generator. Ul-a generates a square wave, and...
Using a single-coil latching relay, which latches/resets with opposite polarities. I`ve tested...
One crude method for distance measuring is by using an ultrasonic transducer. the principle is...
A feedback amplifier having closed-loop gain, Af greater than unity can be obtained by the use of...
The diagram below shows that power supplies don`t have to be complicated, especially in low-power...
This simple combination lock accommodates codes from 1-9 digits long, with the only restriction...
Circuit shown in Figure 3-12. It has a variable speed and timing control functions. When the...
Elements and internal function diagram shown in Figure 9-50, c, i, C2 is the feedback capacitance...