The simplest charger. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Chargers, batteries, galvanic cells
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This battery charger was used back in the 70s for police radio stations.
Everything is simple and works perfectly. As is known from physics, the resistance of a metal is proportional to its temperature, and therefore the more current is drawn through the light bulb, the higher its resistance.
Increasing the resistance of the light bulb limits the charging current of the battery. The main thing here is to choose the appropriate lamp for the charging current. From the ratio current = capacity / 10.
See other articles Section Chargers, batteries, galvanic cells.
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