In the original publication of the 90s a 556 consisting of a double 555 is suggested. The circuit drives a speaker with good power. The power transistor shall be fitted with a heat sink.
August 2017 - STMicroelectronics' BlueCoin development environment is available at Mouser...
This amplifier was obtained from the CA3140 datasheet, an operational amplifier with JFET at the...
September 2017 - Vishay Siliconix SQ MOSFETs for automotive use are in stock for immediate...