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KY-039 Finger Detection Heartbeat Measuring Sensor ModuleFeatures-Use IR LED and an optical transistor to detect pulsation in fingersSmall and Compact moduleEasy to use...

RFID 13.56MHz Card-5PcsFeatures-Contactless transmission of data and supply energy (no battery needed)AnticollisionEEPROM1Kbit, organized in 16 sectors, each district two passwordsUser-definable access conditions for each memory blockData retention of 10 years.Write endurance 100 000 cyclesSecurityI..

Linear Magnetic Hall sensorFeatures-Features wide-range voltage comparator LM393Adjustable sensitivitySignal output indicator with the retaining bolt hole, convenient installationOutput form digital switch output (0 and 1 high and low level)Signal output indicationSingle-channel signal outputThe out..

Vibration Switch ModuleFeatures-No direction, any angle can trigger the work.Sensitivity switches can be selected for the trigger sensitivity according to circuit requirements.This switch is suitable for the trigger of the small current circuit...

Ai Thinker NF-01-S Wireless Transceiver ModuleFeatures-DIP-8 ultra-small package, built-in 2.4G antenna, small size, easy to use Supports data reception for six channels Supports common modulation such as GFSK / FSK Supports 2Mbps / 1Mbps / 250Kbps data rateMulti-frequency: 126 freque..

125KHz RFID Tag 5pcsFeatures-    This is 125KHz RFID Tag. The RFID technology is used for sensing and identifying tagged people and objects for access control, automation, and a whole range of different applications.    Operating on a frequency of 125kHz, these tok..