This circuit was found in a 1966 EEE. What it does is it converts the logic levels of 0 V and +4 V into -6 V and +6 V. Some older type transistors can be replaced by modern equivalents.
e find this circuit in documentation for radio amateurs of 1974. The unijunction transistor can be...
Rapid Prototyping Boards for 32-bit Applications Include Peripherals, Easy-to-use Interface and...
This sound intensity meter was found in a 90s Elektor. The circuit uses an integrated device from...