Single Key Touch Sensor using LM2907

  • Rajkumar Sharma
  • 76 Views
  • easy
  • Tested
  • SKU: EL119465
  • Quote Now

This is a single key device featuring a touch ON (Momentary) output. The project is built using the LM2907 chip. The board provides stable sensing and has a wide working power supply range 5V to 12V DC and consumes 20mA. D1 power LED, D2 function LED.

Touch sensors are used in many applications, from remote controls, LED light controls to appliance control panels. This is a simple solution to replace a mechanical button and can be implemented in a wide variety of applications. The sensor provides a great user experience. It is easy and more convenient to use as it has no moving mechanical parts.

Features

  • Supply 5V to 12V DC @ 20mA
  • D1 Power LED
  • D2 Function LED, indicates when Sense
  • Sensor Output Normally High – Goes Low when triggered
  • Sensor Output TTL 5V when Supply 5V, Output 12V When Input Supply 12V
  • PCB Dimensions 40.48 x 13.02 mm

Schematic

Parts List

NOQNTY.REF.DESCMANUFACTURERSUPPLIERPART NO
11CN14 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5317-ND
21C110uF/16V SMD SIZE 1206MURATA/YAGEODIGIKEY
32C20.1uF/50V SMD SIZE 0805MURATA/YAGEODIGIKEY
41C3DNP
51C50.47uF/25V SMD SIZE 1206MURATA/YAGEODIGIKEY
62D1,D2LED SMD SIZE 0805LITE ON INCDIGIKEY160-1427-1-ND
72R1,R71K 5% SMD SIZE 0895MURATA/YAGEODIGIKEY
83R2,R5,R610K 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
91R3120K 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
101R40E SMD SIZE 0805MURATA/YAGEODIGIKEY
111U1LM2907-N-8 SMD SO8TIDIGIKEYLM2907M-8-ND
121C40.1uF/50V SMD SIZE 1206MURATA/YAGEODIGIKEY

Connections



Gerber View

Photos

Video

LM2907 Datasheet

lm2907-n

PCB

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