Free electronic circuit design and schematic diagram
This is a video tutorial for oscilloscope. This video Shows how to oscilloscope. This video uses an oscilloscope, signal generator, probe and simple circuit. The oscilloscope is very useful for signal analysis. To use the oscilloscope, a probe is needed. The probe has edge ground connection and lead connection that is used to connect to the oscilloscope. Beside that the […]
Read moreThis is a function generator video. This video explains about the features of the function generator and their function. The function generator is a tool that can be used to generate the waveform. The output of the generator is a voltage which change regularly over change. The function generator in this video is HP 33120A function generator. The function generator […]
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This voltage to frequency converter (VFC) circuit uses 555 IC and 741 op-amp as the main components. Up to 20kHz oscillation can be produced by this circuit. Here is the schematic diagram: The zero adjustment is used to adjust the lowest frequency, short the input to ground and adjust this pot to obtain the lowest frequency limit. This circuit uses […]
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This audio mixer is built with transistors. This audio mixer circuit is unique, not based on low input impedance amplifier. Most of audio mixer circuit is based on low impedance amplifier, so a high resistance signal source point can be summed together without disturbing each other. This mixer circuit is different, since the circuit is based on something like open […]
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Low distortion circuit is very important if we want to measure distortion level of an audio equipment, but this is just one example of low distortion oscillator circuit application. Here is the schematic diagram: This oscillator is designed for audio application, with the adjustable frequency range of 30Hz to 20kHz, set by 470k pot. This potentiometer should be of stereo […]
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A 60Hz signal generator can be useful in testing your circuits. You can test your notch filter, simulating hum noise, or you can use it as part of your DC-to-AC inverter design. Here is the schematic diagram of the circuit: The circuit consist of twin T network built around 33k resistors and 0.068uF caps inside a feedback loop. You can […]
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This amplifier has VHF (very high frequency) and UHF (ultra high frequency) response, you can use it for receiver booster for example. Here is the schematic diagram of the circuit: The current consumption is very low, under 20 mA for 14V voltage supply. Lower current consumption can be achieved if we use 10V power supply, the current consumption would be […]
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