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Sub circuit description
Battery connection
4 x AAA (LR03) batteries are connected in series to S24(+) and S19(-). Q1, Z2 and R8 work as a
protection against wrong polarization.
The MCP1702T step down the input voltage to 3.3VDC. Caps are mainly for stabilization.
Technical description for
HC20 schematic
Side 2/7
Rev. A
Date:
2014-09-26
Init: TOP
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