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Recent posts

Light sensitive alarm using LDR

This alarm activates when the illumination level changes from almost total darkness to a moderately high illumination level. When this happens the alarm is locked and the alarm signal, be it a light or a sound, remains active.

Metronome circuit with adjustable BPM

This metronome circuit with adjustable BPM, allows those persons who study or are music fans, to keep the timing, quite accurately for a long period of time.

High current pulse generator

High current pulse generator using a 555 timer and a voltage regulator. This circuit can be useful for DC Motor control. Light control, etc.

Diode Tester Circuit using 741

This diode tester circuit checks, if the diode is in good condition and also determines its polarity. To accomplish our goal, we use an 741 operational amplifier (IC1) configured as an oscillator.

Resistor, Resistance and Conductance

A Resistor is an electrical element that causes opposition to the flow of the electric current.  Using the Ohm’s Law V = I x R we can find the voltage on the resistors terminals.

Logic probe circuit using CD4001 IC

Logic probe circuit with CD4001 IC. This circuit is implemented with CMOS IC technology and is recommended for testing circuits using the same technology

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