Easy to use solid state relay module with 5V operation, no additional relay driving circuitry is required, can be triggered directly from logic level signals. Can switch up to 240VAC at 2A currrent level. LED indication of ON relay is also given on the module board. SSR gives better performance with respect to traditional coil based relay as they are no mechanical parts inside, no chances of mechanical wear and tear. Long life relay with quite operation, no relay ticking sound.

Features
1. A button module using a button of 12x12x5 mm size.
2. Working voltage: DC 5V.
3. Output digital signals; with 3-pin anti-reverse cable included.
4. PCB size: 2.0 x 2.0 cm.
5. With power light and indicator of digital signal output.

Application
The module is mainly used as a switch.

Component List
- 1 x Button module
- 1 x 3-Pin anti-reverse cable

Feature
1. Relays are suitable for driving high power electronic devices such as lights, electric fan and air condition. This relay module can be used to control high voltages with a low voltage by connecting to an MCU
2. Working voltage: 5v; PCB size: 2.0 x 4.3 cm
3. With power indicator and signal output indicator

Features
1. A precision potentiometer that is adjustable.
2. 3-pin anti-reverse cable included.
3. With an adjustment cap on the potentiometer.
4. Working voltage: 5V; PCB size: 2.0 x 2.0 cm.
5. adjustable range: 0 - 10K.

Features
1. An RTC-DS1302 module that uses a DS1302 serial real-time clock (RTC) chip.
2. The RTC counts seconds, minutes, hours, date of the month, day of the week, month, and year leap-year compensation valid up to the year 2100.
3. It operates in either the 24-hour or 12-hour format (with an AM/PM indicator).
4. High performance, low power consumption; with 31 bytes of static RAM.
5. Working voltage: 2.5V ~ 5.5V; PCB size: 2.5 x 2.5 cm.

Features
1. HIGH SENSITIVITY – sensitive to LGP, propane, and hydrogen, also applicable to other fuel gas.
2. WIDE DETECTING RANGE – sensitive to gas in different concentration levels
3. DIGITAL AND ANALOG SIGNALS OUTPUT - With a comparator LM393 to output both digital and analog signals.
4. ADJUSTABLE SENSITIVITY – Blue potentiometer is to adjust the sensitivity for gas.
5. SPECIFICATIONS - Working voltage: 3.3V - 5V; PCB size: 2.3 x 4.0cm
6. For more details, click http://wiki.sunfounder.cc/index.php?title=MQ-2_Gas_Sensor_Module

Features
1. An analog temperature sensor module that consists of an NTC thermistor, resistor, capacitor in a circuit.
2. The NTC thermistor is very sensitive to ambient temperature and hence widely used to detect the temperature, with a wide range of temperature measurement.
3. Working voltage: 3.3V-5V; PCB size: 2.0 x 2.0 cm.
4. High measurement accuracy with a wide range, good stability, and strong overload capacity.
5. A 3-pin anti-reverse cable included.

Features
1. A humiture sensor module to test temperature and humidity, which uses the sensor DHT11.
2. Humidity measurement range: 20 - 90%RH.
3. Temperature measurement range: 0 - 60℃.
4. Output digital signals indicating temperature and humidity.
5. Working voltage:DC 5V; PCB size: 2.0 x 2.0 cm.

Features
1. A flame sensor module that consists of a flame sensor, resistor, capacitor, potentiometer, and comparator LM393 in an integrated circuit.
2. Sensitive to flame, also responsive to general light; generally used for flame.
3. Detect flame or light of a wavelength ranging from 760 to 1100 nm.
4. Output clean signals by a comparator, with good waveform and driving capability as strong as more than 15mA.
5. Working voltage: 3.3V - 5V; PCB size: 2.3 x 2.3 cm.

Features
1. BMP180 is a high-precision, small-sized and ultra-low-power barometer. It is applicable to mobile devices.
2. It contains a built-in stabilivolt (3.3V), thus being able to work under 5V. PCB size: 2.3 x 2.3 cm.
3. Excellent performance. Its absolute accuracy can be down to 0.03 hPa. Ultra low power consumption as 3μA.
4. Pressure range: 300~1100hPa (9000 to 500 meters elevation).
5. With temperature output and an I2C bus.