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If you studying music playing, you should have a metronome. Today, electronic metronome is much more popular than mechanical metronome because the electronic metronome has several advantages. They are compact/small, reliable, cheap and very simple. Here is one example of the electronic metronome circuit : Parts: * R1 10K 1/2W …
Read MoreThis free running oscillator employs LM111 comparator. The output of this oscillator is square wave. You can use this square wave oscillator for general purpose. Here is the schematic diagram of the circuit: [Source: National Semiconductor Application Note]
Read MoreThis is a circuit which is a modification of Hartley oscillator with the addition of several components. This circuit uses a small audio transformer, type LT700. The primary of this transformer is center tapped with an impedance of 1Kohms at 1KHz and the secondary has an impedance of 8 ohms. “Chirp” characteristic of this …
Read MoreCircuit below is a very sensitive 3-transistor amplifier using a speaker transformer. This can be wound on a short length of ferrite rod as show above or 150 turns on a 10mH choke. The biasing of the middle transistor is set for 3 V supply. During idle conditions and the quiescent current is …
Read MoreThis a high-side current amplifier circuit breaker. The circuit-breaker application is possible for that device because the latching-comparator output (COUT1) on the MAX4373, a high-side current-sense amplifier with reference and comparator. Here is the circuit : This circuit uses MAX4373FESA as a circuit-breaker threshold of 900mA, because its gain from sense …
Read MoreThis is a metronome circuit that has mechanical sound character. The metronome that has mechanical sound character will make our life more fun and it would be elegant and cool. Here is the circuit : This circuit uses two two 555 oscillators. To make high frequency tone, it uses first oscillator and to …
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