Learn and build electronic circuits
In one of our projects we required several matched silicon diodes for accomplishing a perfectly balanced modulation design. We could easily construct it through a 9 V battery for the supply, two precision resistors, a digital voltmeter, as depicted in the following diagram. The two 2.2 k resistors, namely R1 and R2, must be a … Read more
This simple capacitor tester can be used to identify the values of unknown capacitors. This bridge design was actually built to come across values for odd, unmarked or unknown capacitors. Whilst not really being of good reliability, it can provide a great sign towards the value of the capacitor. A well-known value component is positioned … Read more
Eventhough a common multimeter is appropriate for almost all DC voltage measurement it may at times demonstrate to be insufficient. This can be the situation when designing measurements on higher impedance circuits which are unable to provide current needed to work perhaps a subtle moving coil meter of the type usually utilized in a multimeter. … Read more
ON SEVERAL events it is really beneficial to manage to establish the frequency of an audio signal. Usually, the consistency and cost of a commercial frequency meter is not really justified. This little frequency meter circuit , employing just a few components will give you a signal of frequencies through 50Hz to 10kHz having an … Read more
There are numerous potential applications currently to explain the use of a noise level meter – for example, monitoring the sound output at dances, discos etc. The unit explained in this article was developed mostly to establish the noise level generated by model engines. How the Circuit Works It has five switched ranges from 70 … Read more
This simple and easy affordable millivoltmeter circuit possesses three measuring ranges of 10mV, 100mV, and 1V. RMS full scale sensitivity. The frequency response includes 1 dB points at around 20 Hz and 75kHz. The instrument is appropriate for creating sound noise, frequency response, and gain measurements, and could be beneficial to any kind of newbie … Read more