For present-day owners of vintage Commodore computers, keeping data and programs safe and backed up is top priority. Disk drive storage was more common in the US, whereas in Europe, the audio cassette ...
A series of magnetic-field indicators detects attempts to affect measuring devices, such as utility meters, with magnetic fields coming from permanent magnets. The indicators can be used with water ...
This sound level meter circuit can be used to control the intensity of a sound recording or in a disco. It has 5 measurement domains between 70 and 120 dB; reading accuracy is 0.5 dB. Microphone M1 is ...
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