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These boards work well for the most part, and you can't beat the price. I had some trouble with building stable circuits with them, especially when trying to use them with firmware to use them to read a DHT21 sensor, but an extra capacitor or three on the power supply helped a lot. Be very careful about input power! I fried a couple of these by accidentally feeding them 5-8 volts. Use 3.3 volts ONLY!
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Verified purchase: Yes | Condition: New
a real pleasure to make business
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Verified purchase: Yes | Condition: New
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