Free electronic circuit design and schematic diagram
The reason why TC9400 V/F converter is very useful in the laboratory are because it’s portable, battery-operated, and low cost frequency source. Both pulse and square-wave outputs are provided by the TC9400. A triangular waveform can also be generated by adding an op-amp integrator. The outputs can be frequency-modulated via the FM input. [Circuit’s schematic diagram source: Microchip Application Note]
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This circuit is a Delayed Pulse Generator that is used to provide pulse rate and independent control of initial delay. The pulse generator of this circuit is IC1c which the operation is depended on the normally low O/P of the IC1a. The PB1 is used to make the circuit input goes low. When PB1 is pressed, IC1b O/P goes high […]
Read moreThis is a video of EMI/RFI filters. This video explains about electromagnetic filters and radio frequency filters. This video also describe about consequence of the filter that is implemented on the susceptible system. The information of insertion loss and electrical characteristics of EMI/RFI filters are shown on this video. The example of EMI/RFI filters are powerline filter, power entry modules, […]
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If the sensor system need an active supply, we can use only a single pair of cable to carry both the power supply and the output signal. Not only simplify the wiring, converting analog voltage level to frequency modulated pulse improve the noise immunity as well. Here is the schematic diagram of the system: The diode is employed to prevent […]
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This is a Electrostatic transducer for ultrasonic measurement circuit. This circuit uses the LM1812 ultrasonic transceiver. Transducer x1 and LM1812 will transmit a burst of oscillations. Then the return echo is listened by using X1. The LM1812 detector will generate a pulse of the same width as the original burst when the X1 receive an echo of sufficient amplitude. If […]
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We can construct a tachometer using the TC9400 in the F/V mode to convert the frequency information (RPM) into a linearly proportional voltage. Then we can compare this voltage to one of “n” comparators (on this example using 8). The respective LED lights up and will continue to stay lit as long as the voltage exceeds the trip point when […]
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This is a Low-Cost Accurate Square-Root Circuit. This circuit is used to provide a square-root function with a good accuracy. The benefit of This circuit is cheap. This circuit produce a current output which can be used to be converted to voltage by a summing junction current-to-voltage converter or to drive a meter directly. This circuit requires 15V supply. The […]
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