This simple logic level tester was found in Radio Electronics from the 90s. The inverters are of the 4009 type and the power comes from the circuit being analyzed.
Found in an Electronic Design from the 90s, this circuit generates a mathematical function given by the...
This oscillator generates a fixed frequency signal determined by C1 and C2. In the case of 1 nF,...
This amplifier for distributing audio signals appears in other articles on this website and even...