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How about just lighting up a letter A ?
Are you sure? yes | no
You could probably make a small wearable device with two leds, green and red, where red is high temp, and green low. A small termostat, a simple chip and a battery.
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How about just lighting up a letter A ?
Are you sure? yes | no
You could probably make a small wearable device with two leds, green and red, where red is high temp, and green low. A small termostat, a simple chip and a battery.
Are you sure? yes | no