Description Specification: Dimension 28mm*12mm*10mm Main chip DHT11 huminity sensor Voltage: DC 5V Digital output Humidity Range: 20—90%RH Humidity accuracy: ±5%RH Temperature range: 0—60℃ Temperature accuracy: ±2℃ Temperature and humidity measurements are a nice addition to many hobby projects. But [Rajendra Bhatt] makes the point that many of these sensors have a price tag that is well above what most hobbiests are willing to spend. He decided to take an in-depth look at the DHT11 sensor; which you can get your hands on for under $1.6 if you know where to look. The four-pin device uses a 1-wire protocol. [Rajendra] discusses the ins and outs of the communications, demonstrating the part using a PIC 16F628. It’s a snap to connect to your project, requiring VCC, GND, and a pull-up resistor on the single data line. We’ve already seen it used on at least one project, and hope to see more of this little guy in your own hacks. Buck order price: 15% discount for more than 80pcs order, 20% discount for 200pcs order. All documentation, demo code please see this page.
