Free electronic circuit diagrams

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Lie Detector Circuit Diagram

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This lie detector circuit diagram will accord two readings: one for difficult questions for the accountable and addition to appearance its...

NE555 DC Motor Controller

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A simple DC motor controller circuit using NE555 is apparent here. Many DC motor acceleration ascendancy circuits accept been appear actua...

LM3914 12V Battery Level Indicator

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The affection of this circuit is the LM3914 from civic semiconductors. The LM3914 can faculty voltage levels and can drive a affectation...

Amplifier Timer Circuit Diagram

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This circuit turns-off an amplifier or any other device when a low level audio signal fed to its input is absent for 15 minutes at least. Pu...

XR2212 PLL FM demodulator Circuit

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A simple PLL FM demodulator circuit using IC XR2212 is shown here. XR2212 is a highly stable, monolithic PLL (phase locked loop) IC specific...

12v Automotive Electrical Voltage Indicator

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When troubleshooting the 12v electrical system of an automobile, it's nice to possess an easy voltage indicator tool rather than a voltm...
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