Free electronic circuit design and schematic diagram
This is a Auto-Off Power Source circuit. This circuit is used to turn off the power source automatically. This circuit uses the MAX931 that has key features such as high current output, an internal reference, 2.5µA supply current, and hysteresis. This circuit requires only 3.5uA quiescent current to provide voltage of Vbatt -0.12V with 10mA load. Here is the circuit: […]
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The OPA2544 is a dual high-voltage/high-current operational amplifier. We can use it for driving a wide variety of high power loads. 2A output current is provided by this device and power supply range extends to +-35V. Two high performance FET op amps with high power output stages are integrated in OPA2544 on a single monolithic chip. The amplifier and load […]
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This is a circuit of Bi-Directional Motor Drive with Speed Control. This circuit is designed to replace the conventional drivers. The component cost can be reduced and efficiency will increase if we use this circuit. Here is the schematic diagram of the circuit: This circuit include all required circuitry to modulate two bi-directional pulse train outputs in proportion to the […]
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We can use this circuit diagram to adjust the speed of a low-power induction motor, such as those which can be found in fan application. The function of capacitors C1, C2 and C4 is to filter the noise coming from TRIAC commutations. X2 technology is used for C2 capacitor whereas Y2 technology is used for C1 and C4 capacitors. Here’s […]
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This is a Light position controller circuit. Light position controller is a monolithic integrated circuit which is used in passenger cars. Potentiometer on the dashboard is used to define the light beam’s elevation of the head light of the car to a state by the car driver. Here is the circuit: This circuit has some features, they are Thermally protected, […]
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STANDBY/ON switch below is appropriate for applications (industrial and telecom, for example) in which the circuitry must remember its state (STANDBY or ON) after a power failure that occurs when there is no operator. Because the state can be lost if leakage current drains the battery, we can not just rely on an alternative approach based on battery (or supercapacitor) […]
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This is a circuit of board system monitoring for temperature and voltage condition. It uses the NE1617A. The NE1617A is a 2 channel temperature sensor. It can measure remote and internal sensor. It also supports up to nine devices per bus. The temperature data update is selectable from 125 ms to 16 seconds, if it is used in normal operation. […]
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