LED Light With PIR Motion Sensor, Soft On/off and 2yr Battery Life

A friend needed a light for a basement storage room with no mains electricity available. Wishes: assume 1 minute of ON time per day, works from cheap and common batteries, long battery life (1 year+), possibly hands-free operation. I decided to use a widely available hobby PIR sensor board as the switch and design around that, aiming for 2 years of battery service.”

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