This circuit was found in a 1968’s Motorola documentation. The transistor is from that time. The load can have resistances between 10 and 80ohm.
Found in a 1968 Mullard manual, this circuit measures temperature by infrared radiation. The...
Found in a 1970s RCA documentation, this circuit generates signals according to the component...
This Harris circuit from the 90's is intended for recording old EPROM memories. The circuit uses...