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The 74HC85 is a high-speed CMOS 4-bit magnitude comparator designed for digital comparison applications
It can be used for negative-ion generator
Measurement Accuracy: ± 10% F
MPU-6050 Arduino code and libraries using build in DMP processor (Euler & Quaternions)
Sequential timing
Plant Watering Alarm (Chirp) smoke detector The 74HC85 is a high-speedThe Chirp! Plant Watering Alarm is a new device from wemakethings that helps extend the life of your plant by reminding you to water it. This plant water alarm is essentialy a moisture sensor with built in coin battery and sound alarm. Chirp is a plant watering alarm as simple as that. You put it into the soil near a plant and it emits a tiny chirp (sharp sound) when the soil is dry, reminding you to water the plant. Alternatively, Chirp can work as
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