Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 3 / 4   >   >>
Duane Benson
User Rank
Author
Re: What?
Duane Benson   12/20/2013 1:27:55 PM
NO RATINGS
Ah. That makes more sense. It's early. My brain doesn't actually start functioning until about 10:00am out here.

Max The Magnificent
User Rank
Author
Re: What?
Max The Magnificent   12/20/2013 11:52:01 AM
NO RATINGS
@Duane: That type of sensor really isn't senstive enough to detect someone coming into a room,

I meant using the ultrasonic sensor to detect if someone came into the room, and THEN use the ambient light sensor to decide whether or not to turn the lights on :-)

Duane Benson
User Rank
Author
Re: What?
Duane Benson   12/20/2013 11:49:49 AM
NO RATINGS
Max - I'm not sure what the purpose was. The original documentation just says: "The SRF08 can be used as a light sensor." That type of sensor really isn't senstive enough to detect someone coming into a room,

Max The Magnificent
User Rank
Author
Re: What?
Max The Magnificent   12/20/2013 11:23:21 AM
NO RATINGS
@Duane: It's just for measuring ambient light. One of the I2C calls returns the value.

My knee-jerk reaction was that someone just happened to throw one on because they had it lying around ... after which it became part of the design.

But then I thought that they may have thought of using the sensor to detect someone coming into a room and activating the room's lights -- in which case they could use the ambient light level to decide whether or not to activate the main lights.

Max The Magnificent
User Rank
Author
Re: SR-04 modules
Max The Magnificent   12/20/2013 11:19:30 AM
NO RATINGS
@David: I was curious about the modules and managed to find a data sheet on the SR-04 here.  They do have some electronics on-board...

I think the on-board electronics on the '04 are just for pulse-shaping/controlling the out-going "ping" and detecting/registering/noise-filtering the incoming response...

David Ashton
User Rank
Author
SR-04 modules
David Ashton   12/20/2013 12:41:07 AM
NO RATINGS
Very nice work Duane.   I was curious about the modules and managed to find a data sheet on the SR-04 here.  They do have some electronics on-board - from the photos they look like they might be just the US devices only on the board.

I have a couple of boxes of US TXs and Rxs - just the bare transducers.  I'd thought of making something like this with them but for $3 it's just not worth it....

 

Duane Benson
User Rank
Author
Re: What?
Duane Benson   12/19/2013 5:29:19 PM
NO RATINGS
Max - re CdS cell.

It's just for measuring ambient light. One of the I2C calls returns the value. I might end up squeezing one into my board at some point, but until then, that's one feature it will be missing.

As far as adding temperature, pressure and humidity go, I'd like to have sensors for those environmental factors too.

Max The Magnificent
User Rank
Author
Temperature, Humidity, and Pressure
Max The Magnificent   12/19/2013 3:57:45 PM
NO RATINGS
@Duane: I've been told that the accuracy of untrasonic distance measurement readings is a function of temperature, humidity, and atmospheric pressure.

This is probably overkill, but since I'm intending on making my robot a veritable cornucopia of sensors, I'm planning on (a) adding these and (b) seeing how the untrasonic readings varies under different conditions.

a) Are you doing this for your robot?

b) Do you have any advice with regard to these sensors?

Max The Magnificent
User Rank
Author
What?
Max The Magnificent   12/19/2013 3:54:43 PM
NO RATINGS
@Duane: In your blog, when talking about th efirst image of the SRF08, you say "The small part, between the two, near the top, is a CdS light-controlled resistor."

What is this used/required for?

Max The Magnificent
User Rank
Author
Re: What you didn't say...
Max The Magnificent   12/19/2013 3:01:46 PM
NO RATINGS
@Duane: If I ever start to sell any of my creations, I'll need to upgrade to a commercial licence.

That means that so long as you are giving your creations away to me for free, you are OK ... I don't see a downside here LOL

<<   <   Page 3 / 4   >   >>


Radio
NEXT UPCOMING BROADCAST
In conjunction with unveiling of EE Times’ Silicon 60 list, journalist & Silicon 60 researcher Peter Clarke hosts a conversation on startups in the electronics industry. One of Silicon Valley's great contributions to the world has been the demonstration of how the application of entrepreneurship and venture capital to electronics and semiconductor hardware can create wealth with developments in semiconductors, displays, design automation, MEMS and across the breadth of hardware developments. But in recent years concerns have been raised that traditional venture capital has turned its back on hardware-related startups in favor of software and Internet applications and services. Panelists from incubators join Peter Clarke in debate.
Most Recent Comments
R_Colin_Johnson
 
R_Colin_Johnson
 
sranje
 
GeoffBoyd
 
javier ruiz
 
Garcia-Lasheras
 
R_Colin_Johnson
 
MeasurementBlues
 
TonyTib
Flash Poll
Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Special Video Section
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LT®3042 is a high performance low dropout linear ...
Chwan-Jye Foo (C.J Foo), product marketing manager for ...
The LT®3752/LT3752-1 are current mode PWM controllers ...
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...