5-tube commercial radio (T1619E)

This commercial superheterodyne receiver was found in a 1949 Radio Electronics. The circuit uses battery.

Microchip Launches New Development Board for Designing with 16-bit and 32-bit PIC® Microcontrollers
The New Microchip development board is targeted to designers who work with 16- and 32-bit PICs....
Tuned Colpitts Oscillator (CB25315E)
We found this conventional version of a single-transistor oscillator in the January 1996 issue of...
Sensor Shield (CB1328E)
This optical pass-through shield can be used in various applications, such as object sensing or...