4 ms·
The old "Foxhole radio" trick of using a rusty razor blade as a diode comes to mind. Some metal oxide coatings are semiconducting and under the right conditions
by whoopdedo 2y ago
The old "Foxhole radio" trick of using a rusty razor blade as a diode comes to mind. Some metal oxide coatings are semiconducting and under the right conditions will form a Schottky barrier.