Touch Motor Control by SCR and Schmitt Trigger

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  Posted by momename - September 13, 2008 at 9:32 am

This circuit designs for control DC Motor 12 volts. By use the touch on the plate, the Motor as a result turn go to once.
When use a finger touches the metal plate makes Schmitt Trigger Circuit (by IC-4011 nand gate CMOS) take a signal from Oscillator Circuit and make a signal goes out to bias current a base of Q1-2N5088 works and then it will be trigger a SCR1 to drive the DC Motor 12V then turn follow want.

- For power supply type of DC Motor this must be AC current 12 Volts Only. Because of make SCR not bias during negative current there.
- And this circuit works not heavy DC motor power, turn ? do not turn ? Then don’t have to stick heat sink give SCR1-2N4441 for DC motor you will may use motor at use in an automobile all right. Request enjoy.

Touch Motor Control by SCR and Schmitt Trigger

The transistor lat

This circuit, it works similar to a SCR.When the trigger input is high, The transistor Q2 and Q1 will work,therefore a current flow to the base pin of Q2,it has voltage 0.7 volts at resistor R1.
When cutting the activation voltage, the transistors can continue to perform, because the base current.The reset circuit will do this by cutting the power supply circuit for a while, with the switch Reset button only.

The transistor lat

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