Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics 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.

ultrasonic sensor with adc0808

Status
Not open for further replies.

bilalshahid

Newbie level 6
Joined
Sep 3, 2007
Messages
13
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,361
adc0808 circuit diagram

H3llo guys..!
can any one help me out in interfacing LM35 Temperature sensor
with ADC0808 IC....
Plz give me any circuit diagram...!
Thanks
regards
B!L@L
 

how to connect temperature input to adc0808

hi
u can use ADC 0804 instead of 0808 as 0804 is simpler ,also following link might be useful for u.as it is about interfacing 0804 with controller .
https://www.freewebs.com/maheshwankhede/adcdac.html
As far as lm35 is concerned,it give 10mv output for single degree rise in temperautre,e.g if at 1 degree it gives 10mv,at 2 it will give 20mv,simply connect lm35 output to 0804 input,optionally u can use unity follower buffer between 0804 and sensor,u can calculate analog voltage by usig simple formula
Vanalog=ADC value*StepSize
for 8 bit resolution StepSize=vref/256
Shakeel
 

adc0808 circuits diagrams using ssd

shakeel is right, the output of LM35 is 10mv per degree centigrade, and if the Ref+ of ADC 0808 is 5v then the step size of the ADC is approximately 20mv, so basically you wont be able to detect change of one degree centigrade, for this set the Ref+ of ADC 0808 to 2.56volts that way you will be able to detect even 1 degree C change in temperature

Connect LM35 directly to IN0 to IN7 of the ADC, check this link for more info

https://www.dnatechindia.com/index.php/Tutorials/8051-Tutorial/Interfacing-ADC0808-To-8051.html
 

clock circuit for adc0808

Hi amol_shah
where is the clock circuit at clock input for ADC0808,did you think it will work without

Regards
MedTronic
 

adc0808 with lm35

na it wont work without the clock, you will have to give clock pulses for which you can use LM555 in astable mode or you can give those pulses through the controller itself, if you check out the link that i have given over there i have connected the clock to P2.5 & given those pulses through controller itself thus reducing the circuit
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top