This circuit is from Mullard 1969 documentation. The circuit operates at a relatively high supply voltage and has a 10 Vpp output. The transistors are of the time, but admit equivalents.
Found in a 1970s documentation, this mini-organ toy circuit makes use of an integrated circuit from...
This circuit has been found in an old documentation and therefore uses a lamp as an indicator. In a...
Found on a Radio Electronics, but also on other sources and placed elsewhere in this section, this low...