This high quality circuit with complementary symmetry was found in an Electronics World of 1966. It can be made with modern transistors like the BD or TIP series.
This 3-digit thermometer, suggested by Texas Instruments, uses 3 integrated plus the display, with...
I found this circuit in an English magazine from July 1982. The circuit is still viable because all...
This 1965 circuit consists of a small inverter for an ultraviolet lamp. The circuit is from a...