heartbeat sensor
Source: InternetPublisher:两手空空 Keywords: LED sensor power supply and other power circuits Updated: 2020/07/29
A simple heartbeat sensor consists of an infrared LED and an infrared phototransistor. It works by using the skin as an infrared light-reflecting surface. The infrared reflection of a person's skin depends on the concentration of blood in it. As the heart beats, blood density rises and falls.
Latest Power Circuits Circuits
- Introduction and principle analysis of switching regulated power supply
- MT3608 constitutes a 3.7V to 12V boost circuit diagram
- Single-power supply circuit for ISO122P/ISO124
- Isolated two-wire current loop circuit (XTR101, ISO100)
- The constant current source composed of two transistors can drive high power
- Current/voltage conversion circuit using current converter
- An ultra-low output voltage regulator
- Integrated regulated power supply with continuously adjustable output voltage
- Mc34063 MP3 Switching Charger
- Solar Lead Acid Battery Charger
Popular Circuits
- 3×8 LED drive circuit diagram with overvoltage protection function
- LED drive circuit based on switching power supply
- Working principle of single touch mode light switch
- LED lighting display detection circuit with overload protection
- Level display circuit diagram composed of LED level meter driver integrated circuit
- 5-point LED driver circuit diagram of HA7666P/TA7667P
- Light controlled night light lighting circuit
- Digital camera flash control circuit
- Industrial static elimination circuit
- 4 and 1/2 LED digital display (DMS-40PC series)
京公网安备 11010802033920号