12V Battery Charger Without Transformer | Simple & Low Cost Charger Circuit

🧠 Description:

Learn how to make a 12 Volt battery charger without using a transformer — easy, low-cost, and compact! This DIY charger works directly from AC mains using a capacitor dropper circuit. Ideal for small 12V batteries, emergency backup systems, and electronics hobby projects.
⚠️ Be careful: this circuit is non-isolated from mains voltage.

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