This circuit consists of an improved version of the CIR5892, using two transistors and adjusting the operating point. The transistors can be the BC548.
Found in a 1968 Ferranti documentation, this circuit can be implemented with modern equivalent...
This 2003 application consists of showing how a computer CD-ROM can be used to play audio CDs in a...
This circuit, found in a 90s Popular Electronics, uses a 0 to 1 mA milliammeter, which can be...