Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

HSDL-9100 driving circuit

HSDL-9100 driving circuit

HSDL-9100 driving circuit

Hello everyone,
I am using HSDL-9100 sensor (see datasheet here : https://www.broadcom.com/products/optical-sensors/...), to develop an object detection system to save battery power during idle time in an electronic security product i am working on,

in the datasheet there is 2 method to drive this sensor, either using a single chip signal conditioning circuit ADPS-9700 (more expensive), or there is a custom made signal conditioning circuit that mainly comprises a led driver using switching BJT transistor and the detector is connected to a filter circuit then to a comparator,
however the comparator is not defined in the datasheet,

So my question is :
1. What comparator is recommended for this application, and why?
2. Is there a another method to control the sensor (less expensive)

Thank you,

RE: HSDL-9100 driving circuit

It's undefined likely because a slew of them will work. You need to define what speed/voltage level you need one to work at, then simply find one that fits the bill.

Dan - Owner

RE: HSDL-9100 driving circuit

I think the only reason to strobe the sensor is so that the received signal is AC, easier to amplify and filter out the effect of ambient light if it's over a long distance.
Since this sensor is only short range could it not just work in direct current mode?
A comparator I use is the LM211P, it's really cheap and can handle a single sided power supply as high as 24 VDC. It has a transistor output suitable for driving a relay coil or buzzer direct.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - How ESI is Helping Move New Medical Device Product to Market Quicker & More Cost Effic
Early Supplier Involvement has long been a strategy employed by manufacturers to produce innovative products. Now, it almost seems like a necessity. Because decisions made in the design phase can positively affect product quality and costs, this can help add value to OEM bottom lines. This white paper will discuss many facets of ESI, including why it’s so valuable today, what challenges limit the benefits of ESI, how cost is impacted, and more. Download Now
White Paper - Moving to a Driverless Future
This white paper describes what we see as the best practices to support a sustainable engineering process for autonomous vehicle design. It exposes how to use simulation and testing in common frameworks to enable design exploration, verification and validation for the development of autonomous cars at a system, software and full-vehicle level to drive a mature product development process for automated driving. Download Now
Research Report - How Engineers are Using Remote Access
Remote access enables engineers to work from anywhere provided they have an internet connection. We surveyed our audience of engineers, designers and product managers to learn how they use remote access within their organizations. We wanted to know which industries have adopted remote access, which software they are using, and what features matter most. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close