Automatic 9V Battery Charger Circuit Diagram

Automatic 9V battery charger

Automatic 9V battery charger circuit diagram.

The circuit details are based on european standards: 120E, 150E, etc. The ‘E’ just stands for Ohms so 120 ohm, 150 ohm. The original circuit specified the HEF type of CMOS IC’s that are not readily on the market in most of worldwide country. So just get any other kind of CMOS chip like the MC4011, MC4020, MC4047 from Motorola. Any other type will work fine too. The BC548B is replaceble by a NTE123AP (NOTE: ensure it’s the ‘AP’ type, the typical NTE123A is a total different transistor), ECG123AP, and also the 2N3904 will be work. Watch for the proper pin locations because the BCE may be reversed with this european type. The LM317T is a TO-220 type and replaceble with a ECG956 or NTE956. The LM339N could be changed using a ECG834 or NTE834

This schematic diagram come from circuit: Automatic 9V Battery Charger.
Go to that page to read the explanation about above circuit design.

In the electrical sector, a schematic diagram is usually used to describe the design or model of equipment. Schematic diagrams are usually utilized for the maintenance and repair of electronic and electromechanical devices / units. Original schematics were made by hand, using standardized templates or pre-printed adhesive symbols, but nowadays Electrical CAD computer software is often used.

In electronic design automation, until the 1980s schematics were virtually the only formal representation for circuits. More lately, using the progress of computer system technology, other representations were introduced and specialized computer languages were developed, because with the explosive development of the complexity of electronic circuits, classic schematics are getting less practical. As an example, hardware description languages are indispensable for contemporary digital circuit design.

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