Found in an Elektor from the 90s, this circuit can be powered directly by the power grid. The circuit uses a rectifying bridge that can be replaced by 4 common diodes.
The circuit shown in figure 1 uses the ST8R00 from ST Microelectronics which consists of a 1 A...
This is the conventional application of a 1 out of 10 decoder with CMOS 4017, as shown in an old...
We found this third-order Butterworth asymmetric filter in an old manufacturer documentation. The...