37 Sensors Overview

Sensor.Engine MICRO

  1. Sensor.Engine MICRO Features
  2. Pinout and Pin use
  3. BASIC Overview
  4. SEM Library functions

37+ Sensors

  1. Analog Hall-effect
  2. Analog Joystick
  3. Analog Temperature
  4. Ball Switch
  5. Bi-color LED
  6. Button
  7. Character LCD
  8. Flame
  9. Hall-effect Switch
  10. HMI Display
  11. Humidity and Temperature
  12. IR Receiver
  13. IR Transmitter
  14. Keypad
  15. LASER
  16. Light Cup
  17. Liquid
  18. Mercury Switch
  19. Microphone
  20. Multicolor Flashing LED
  21. Obstacle Avoidance
  22. Photo Interruptor
  23. Photoresistor
  24. Piezo Driver or Annunciator
  25. Pulse
  26. Reed Switch
  27. Relays and Drivers
  28. RGB LED
  29. Rotary Encoder
  30. Servo
  31. Shock and Impulse
  32. Speaker
  33. Temperature 18B20
  34. Temperature Threshold
  35. Touch Sensor
  36. Tracking
  37. Ultrasonic Distance

USBmicro U4xx

  1. U401
  2. U421
  3. U451



  1. Controlling MedeaWiz Sprite

Character LCD



LCD display for character (nongraphic) information.

Also called: text display.

Found in kits: Not often in the 37/45 sensor kit, but commonly in the Arduino experimenters kits.


• Voltage: 3.3V to 5.0V
• LED: Backlight (optional)
• Interface: 4/8 bit strobbed with register selection line.
• Size: 20mm X 60mm

There are a number of different sources for these modules. Not every module that looks similar to the ones here behaves exactly the same. Check the specific module that you have for differences in function, voltage levels, pinout, and inactive/active states. Some modules have been found to have incorrectly labeled pins and even poorly soldered components.

There is a selection of LCD character displays that have 8 to 40 characters in a row, and 1 to 4 rows. A typical LCD display is 2 rows of 16 characters.

Some displays have a backlight. This is most often an LED backlight. This backlight could have variable brightness by using PWM.

There is a contrast line that should be connected to a powentiometer (10k works well) that allows for a voltage selection between VCC and ground.

Module Pin-out:

Image: Typical character LCD pinout.

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