This circuit is very simple and can be used to run any wall clock for years.
This circuit has many other applications where 5 volts to 1.5 volts conversion is needed such as in toys etc.

The Schematic includes only three main components
BC547 Transistor & two 10K Resistors
A 18650 Battery is required to run the circuit or any source can be used such as a 5V charger. This circuit has a tendency to tolerate 12V input and convert it into 1.5 volts easily.

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