Tag Archives: Monitoring

Heart Monitor (ECG Sensor Signal Amplifier/Conditioner)

Posted on December 20, 2011 by Rend

Using the circuit depicted in the schematic diagram below we can monitor the heart pulses of patient. This circuit buffer and amplify the heart pulses, and the amplification bandwidth ranges from DC to 3 kHz. For the core of the … Continue reading →

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Supply Voltage Monitor with 555 IC

Posted on August 25, 2011 by Rend

This is a supply voltage monitor circuit, an indicator to show if the power supply is in good condition. Designed using the IC 555 timer, this circuit will flash the LED1 when the supply voltage surpass preset level.  With flashing … Continue reading →

Posted in Lighting and LED Circuit, Power Supply | Tagged , | Comments Off

Audio Signal Clipping Indicator

Posted on October 4, 2010 by Rust

A window comparator formed by two op-amps packaged into IC1 is the heart of the circuit below. With this technique, we can detect precisely and symmetrically either the positive or negative peak value reached by the monitored signal. The op-amps … Continue reading →

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