Found in a 1970s documentation, this mini-organ toy circuit makes use of an integrated circuit from that time. This component is difficult to obtain today.
The circuit shown in the figure is suggested by AllegroMicro (www.allegromicro.com) and consists of an...
The output transistor used in this amplifier must have Vce of at least 200 V and Ic of 1 A and...
This counterphase output step was obtained in a Japanese magazine of 1957, a time when the...