The AD8232 is an integrated front end for signal conditioning of cardiac bioelectrical signals to monitor heart rate. This is a low-power, single-lead and heart rate monitor front end for all types of vital signs.
This bread board power supply module is compatible with 5V and 3.3V, applied to MB102 breadboard. The module contains two channels of independent control, powered by the USB all the way. The output voltage is constant for the DC 5V, and another way is powered by DC 6.5-12V, output controlled by the DIP switch, respectively for DC5V and DC3.3V
Keyestudio slide potentiometer module using high-quality sliding electrical appliance, has the performances of stability and reliability. It is a dual analog output, and outputs 0-VCC analog voltage signal.
The module uses a common ML8511 UV sensor original, which can be used to detect indoor or outdoor UV density.The model also has a fast power saving mode up to 0.1uA, suitable for wearable smart devices, mobile phones and other equipment.
This is a USB to serial module, using the FT232RL chip. The module has a DIP switch used to control the serial communication voltage for 3.2V or 5V. The module has a standard interface, compatible with various Arduino official controllers, such as arduino pro mini.
The new OLED technology only uses electricity per pixel. Because each pixel creates its own light, only the pixels that are on use electricity. This makes OLED technology very efficient; also, the way these types of OLEDs are built allows them to be very thin compared to LCD.
It is a triple sensor integrated with ambient light,proximity sensor and infrared LED, which has two functions,for one thing, it is used to detect the current ambient brightness (ALS); It can in accordance with the current ambient brightness automatically adjust the backlight brightness to conform to ambient light by the mean of software adjustment,which can make backlight brightness soft to protect your vision and to achieve the effect of energy saving.
Keyestudio APDS-9930 attitude sensor module mainly uses APDS-9930 chip. APDS-9930 in a single 8 pin package can provide the ambient light sensor which is compatible with I2C interface and the infrared LED proximity sensor. The ambient light sensor uses double light diode to approximate the visual response of low lumen human under 0.01 lux illumination, and its high sensitivity allows the device to operate in the back of dark glass.
Keyestudio eight-channel solid state relay is a high level effective solid state relay, that is to say, the input control signals is the high level (3.3-5 V), the relay is on; while the input control signal is high level (0-2.5 V), the relay is off.
Keyestudio four-channel solid state relay is a high level effective solid state relay, that is to say, the input control signals is the low level (0-2.5 V), the relay is off; while the input control signal is high level (3.3-5 V), the relay is on.
Keyestudio two-channel solid state relay is a low level effective solid state relay, that is to say, the input control signals is the low level (0-1.5 V), the relay is on; while the input control signal is high level (3-5 V), the relay is off.