This circuit uses an amplifier from National Semiconductor, uncommon nowadays. The numbers in parentheses are for the second channel. The circuit is suitable for old tape recorders.
Based on the Philips TDA3810N, this circuit was found in an 90s Electronics Now. The circuit has two...
Avago Technologies (www.avago.com) suggests the circuit in Figure 9 for amplifying signals of...
This circuit can be used as a buzzer from 3 different locations, allowing you to identify where it went...