Sonsivri
 
*
Welcome, Guest. Please login or register.
Did you miss your activation email?
February 24, 2021, 05:51:35 17:51


Login with username, password and session length


Pages: [1]
Print
Author Topic: Simple optical proximity sensor  (Read 751 times)
0 Members and 1 Guest are viewing this topic.
Catcatcat
Senior Member
****
Offline Offline

Posts: 256

Thank You
-Given: 151
-Receive: 796



WWW
« on: February 07, 2021, 06:58:14 18:58 »



I would like to share a project to create a simple optical proximity sensor that can be used as an optical limit switch or used as, for example, a proximity light switch. A special feature in this project is the principle of protection against parasitic infrared study and simple logic of work. It can be used as a basis for development. In the ready-made firmware for the project, there are options, an optical limit switch, an optical light switch, and an optical switch with auto-off time.


More details here

Use google translator for translation



Additional materials for the project for its repetition:

Simple optical proximity sensor (diagram)

Simple optical proximity sensor (draft) Password to download the project as usual Wink

Simple optical proximity sensor (firmware)

Simple optical proximity sensor (firmware, switch mode 2)

Simple optical proximity sensor (firmware, switch mode)

Simple optical proximity sensor (firmware, shutdown delay mode 2 sec.)

Simple optical proximity sensor, 3D model


PCB prototype, complete, optical limit switch



Logged
Unhappy
Senior Member
****
Offline Offline

Posts: 254

Thank You
-Given: 833
-Receive: 89


« Reply #1 on: February 08, 2021, 06:24:44 18:24 »



sorry , unable to down load the project  with usual password all small letters

« Last Edit: February 08, 2021, 07:00:32 19:00 by Wizpic » Logged
Catcatcat
Senior Member
****
Offline Offline

Posts: 256

Thank You
-Given: 151
-Receive: 796



WWW
« Reply #2 on: February 09, 2021, 07:51:09 07:51 »


sorry , unable to down load the project  with usual password all small letters



Write to me at [email protected] I will send you the project by mail
Logged
Jatayu
Junior Member
**
Offline Offline

Posts: 52

Thank You
-Given: 222
-Receive: 180


« Reply #3 on: February 09, 2021, 11:58:47 11:58 »

Catcatcat, thank you for project!

What is the maximum sensor response distance?
For miniature devices, you can also use ITR8307 proximity sensor. But it has a short actuation distance.

https://www.everlight.com/file/ProductFile/ITR8307.pdf

https://www.youtube.com/watch?v=W0sWB0piA-0
https://www.youtube.com/watch?v=VjfJTH6r6xY

https://aliexpress.ru/item/10PCS-ITR8307-S17-TR8-B-8307/32715815106.html
Logged
Catcatcat
Senior Member
****
Offline Offline

Posts: 256

Thank You
-Given: 151
-Receive: 796



WWW
« Reply #4 on: February 09, 2021, 04:41:23 16:41 »

It all depends on the photodetector and the LED itself. In the project, for the optical limit switch, I tried to reduce the sensitivity, so that it would not be more than 20 cm (by reducing the pulse duration in PWM), but in reality, when tested by 1 meter, it worked fine.
Logged
vern
V.I.P
Active Member
*****
Offline Offline

Posts: 126

Thank You
-Given: 7
-Receive: 35


« Reply #5 on: February 10, 2021, 12:35:18 12:35 »

I have a project where I use a VCNL4200 proximity sensor, very small and simple with I2C connection. It includes the LED, the detector and a driver for shorter distances ~30cm . For longer distances you need to add a small Mosfet
Distance up to 1.5 meter depending on configuration.
Logged
an007_rld
Junior Member
**
Offline Offline

Posts: 48

Thank You
-Given: 33
-Receive: 51


« Reply #6 on: February 11, 2021, 12:09:12 00:09 »

Guys,

As a nice and cost effective alternative, you can take a look to VL53 series from ST. Works up to 8m (VCSEL + detection SPAD area + required circuitry) and they provide an easy to use API to build your application:
https://www.st.com/en/imaging-and-photonics-solutions/proximity-sensors.html#products

Hope that helps,
Best Regards,
-an
Logged
Pages: [1]
Print
Jump to:  


DISCLAIMER
WE DONT HOST ANY ILLEGAL FILES ON THE SERVER
USE CONTACT US TO REPORT ILLEGAL FILES
ADMINISTRATORS CANNOT BE HELD RESPONSIBLE FOR USERS POSTS AND LINKS

... Copyright 2003-2999 Sonsivri.to ...
Powered by SMF 1.1.18 | SMF © 2006-2009, Simple Machines LLC | HarzeM Dilber MC