Using L144 operational, this circuit applies to other equivalent operational. The circuit is from a documentation two years 90. The power supply must be symmetrical.
This indicator was found in a 1974 publication, but it can be fitted with the BC548 transistor or...
This circuit was obtained in a documentation about old neon lamps. The circuit indicates when a...
The circuit shown is from a 1994 National Semiconductor technical documentation. The circuit can...