The integrated circuit used in this amplifier is not very common today. This amplifier was found in the 1977 National Semiconductor Audio Handbook. The power source must be at least 500 mA.
This interface was found in a Modern Electronics magazine from 1990. Although the circuit is...
This circuit came out in an English publication from 1973, but it can be easily assembled using a...
According to what is said, the bugs are the female insects (mosquitoes, muriçocas and others)....