schematic for a police scanner, aka schematic for a police scanner and schematic for police scanner
A piece of paper with instructions on how to make your very own police scanner.
It tells you how to make a police scanner with the following components:
- 1 - broken battery pack
- 1 - keypad circuit
- 1 - small loudspeaker
- 1 - microprocessor
- 1 - quartz crystal
Making this would take some familiarity with craft.
In the upper right corner is a note: 'First discovered by Dr. Rade.'
It weighs about 100 grams. It is a electromechanical schematic. You think it might fetch about $2 on the market.