HDS05, the dew sensor, is a kind of switching-mode element and only sensitive to high-humidity, working under DC. It's used to protect equipments from dew because its high precision and quick response.
Working voltage: 0.8V DC(Max)
Working temperature range: 0-100Celsius
Working relative humidity range: 0-100%RH
Resistance: 75%RH, 10K ohm(average)
93%RH, 100K ohm(average)
95%RH, 200K ohm(min)
Small, light, High sensitivity under high-humidity circumstance
The AD8232 based module is a cost-effective board used to measure the electrical activity of the heart. This electrical activity can be charted as an ECG or Electrocardiogram and output as an analog reading. ECGs can be extremely noisy, the AD8232 Single Lead Heart Rate Monitor acts as an op amp to help obtain a clear signal from the PR and QT Intervals...
The 555 timer IC is an integrated circuit (chip) used in a variety of timer, pulse generation, and oscillator applications. The 555 can be used to provide time delays, as an oscillator, and as a flip-flop element. Derivatives provide up to four timing circuits in one package.
“An open-source firmware and development kit that helps you to prototype your IOT product within a few Lua script lines” Based on ESP8266 ESP12E wifi board, on-board USB-TTL support directly flashing from USB port, also on-board power circuits and all IOs setup.
The UV Sensor is used for detecting the intensity of incident ultraviolet(UV) radiation. This form of electromagnetic radiation has shorter wavelengths than visible radiation. This module is based on the sensor UVM-30A, which has a wide spectral range of 200nm-370nm. The module outputs electrical signal which varies with the UV intensity, which gives your...
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