Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Help me connect temperature sensors LM335(z) to the analog input of microcontroller

Status
Not open for further replies.

woody1189

Newbie level 3
Joined
Aug 27, 2007
Messages
4
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,308
I am having trouble getting my Handyboard to interpret the readings correctly from a temperature sensor. I'm not sure if the schematic online is correct and could use any help whatsoever. The sensors I have are the lm335z and the lm35, which should i use and how should i go about connecting it to the analog input of my microcontroller?

Schematic-http://makezine.com/images/07/sensor.gif
U1 =Op-amp chip OPA 4241PA
R= 10 kohms
Pot = 10kohms
 

cameo_2007

Advanced Member level 3
Joined
Mar 15, 2007
Messages
752
Helped
70
Reputation
142
Reaction score
44
Trophy points
1,308
Location
12°58' N77°38'E
Activity points
5,046
Need Help

As per the kct,u shud use LM335,as it is a adj type.
And the LM35 is not.
The circuit is a combination of instrumentation amplifier and differential amplifier.It is a discrete one.U can even use integrated chips for that like INA121 from ti.
Connect as given in the ckt.Have you connected.?
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top