USB charger with a timer
- Dr. Tõnis
- Nov 10, 2019
- 1 min read
It is a USB charger that turn complacently off after 3.5 hours. After one presses the power button (the red one) a relay is turned ON and it stays ON approximately 3.5 hours. If the user presses the other button (the gray one) the timer is reset.
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