Free Simple Circuit Diagram
This is a circuit that can generate 1kHz to 25kHz sine waves with a THD better than -80dB. This circuit consist of a 4th-order low-pass filter, a TTL counter and 8-channel analog multiplexer. Here is the circuit : The bipolar dc input of multiplexer is provided by two resistive dividers connected from ground to VDD and ground to VSS. The […]
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The safety shutdown and fault isolation protocol are critical in many telecommunication, industrial, data processing system and industrial. To share data between communication processor or single-board computers, actuator and sensors, the fault detection system uses RS-485. This RS-485 uses two signal wires to detection of valid signal levels that require a differential window comparator and to transmit data. Here is […]
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This is a status panel driver circuit. This circuit is used to turn on lamps or LEDs in a graphic panel that represent faults, action, and status of an industrial machine. This circuit has advantages compared with other graphic status panel. It is more economical than computer graphic display and the communication between machine status and operator faster than other […]
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This is a circuit of FETVM-FET Volmeter. The function of the VTVM is replaced by the FTEVM while at the same time ridding the usual line cord instrument. This circuit can allow a 0.5 volt scale range because drift rate of FETVM are superior to vacuum tube circuits. Here is the circuit: The 2N4340 are implemented on this circuit because […]
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