Circuit Project Electronic

With just a low cost DC adapter and the circuit described here it is possible to build a low cost stabilised, uninterruptible 9 V supply. On the grounds of safety and economy, a simple unstabilised 12 V D.C. adapter is used as the power source, a universal adapter with its output set to 12 V [...]

This is a regulator for a 6V/3W bicycle hub generator system. The purpose is to manage the powering of bicycle lights from the hub generator and from rechargeable batteries, to charge the batteries using excess power from the generator, and to provide intelligent charging of the batteries from an AC adapter, when needed.
The switch has [...]

This is circuit power supply, 6V backup battery power supply regulator with IC 7805.
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For inportant circuit, Because this circuit with backup system by Baterry 6V.
Detail read in circuit.
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Battery [...]