Found in the September 1998 issue of Electronics Now, this circuit uses an encoder with reed switches. The circuit indicates the position of a “indicator” and thus the direction of the wind.
The CMOS TLC555 can be gated from external CMOS circuits using the configuration shown here. The...
In the figure we have a two-channel preamplifier with two 741 integrated circuits. The circuit is from a...
We found this circuit in a documentation from the 50's. The transistors are germanium types. The...