Preamplifier stage (CB8934E)

This circuit is from a 90s Popular Electronics. It appears elsewhere on this site. Q1 can be any general purpose transistor.

MAX30205 Human Body Temperature Sensor (COM155E)
November 2016 - Mouser Electronics is supplying the MAX30205 from Maxim, a human body temperature...
Short-wave receiver (CB9149E)
This several short-wave bands receiver, according to the chosen values of the components, was found in...
100-LED Matrix VU (CB16524E)
This LED effects circuit was found in a 1998 publication, but it can still be easily assembled by the...