Free Simple Circuit Diagram
DC drive for a Universal motor is shown in figure below. In order to supply DC current to the motor, a diode bridge has been added around the motor. The motor current freewheels through the diode bridge after the TRIAC current crosses zero. To limit the rate of fall of the current as defined in the TRIAC specifications (12A/msec for […]
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The figure below shows the schematic of a Digital Thermostat. The output of LM35 is digitized by the A/D. The LM35 is a temperature transducer IC with an output of 10 mV per ‘C. This 10 mV corresponds to 1/2 LSB and the circuit resolution is 2 ‘C if the Vref/2 is set for 2.56 V. The resolution become 1’C […]
Read moreDigitizing transducer interface output voltage is shown on circuit diagram below. The transducer in this case is the NE5521, an LVDT (Linear Variable Differential Transformer) Signal Conditioner. To ensure that the input to the A/D does not go excessively beyond the supply voltage of the A/D, this device is use the diode at the A/D input. For a better description […]
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To sense and control the current in stepping motors and other similar devices, we can use a linear integrated circuit like L6506. The chip set forms a constant current drive for inductive loads and performs all the interface functions from the control logic through the power stage when used in conjunction with power stages like the L293, L298N, or L7180. […]
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