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.
try connecting your hardware to the PC and check if you are getting the commands sent on the hyperterminal. generally the problem lies in mismatch of baud rates.
try an RTD sensor like PT100 or Pt1000 ( class A type ). it can give you the required accuracy provided you use a decent analog processing circuit as sky suggested.
and as you mentioned tat you want to control the temperature within +/- 0.1 °F does not necessarily mean it should have that...
i have been using op07 as an amplifier for the past 15+ years in all my analog small signal conditioning circuits and i can assure you neither 741 nor op07 will ever work on a single supply which is shown in the circuit. So i would strongly suggest the poster to take inventors recommendation to...
the power integration company provides a variety of SMPS controllers according to your specific needs. it also provides a good design support software 'PI expert' to calculate the neccesary parameters for free. I think you should look into it.
Welcome To Power Integrations | Power Integrations...
there is no hard and fast rule for the maximum value of current but the practical values for most of the applications lie between 0.1ma and 1ma. the lesser current the better to ensure minimum deviation in accuracy due to self heating of the element.
hi guys,
i am using a ATmega8 chip along with its internal ADC to read an analog temperature reading from a thermocouple. As the chip has a single ended ADC input, i am forced to use the same ground plane for both the digital section and the analog signal conditioning section. Though i have used...
looks perfect to me.
just take care about the reference voltage given to it due to the low amplitude and high resolution of the ADC ( provided you are using the whole 20 bit span).
good luck.
i think you can start with ADS1110. It has differential input ( very useful in your case), internal reference , 16bit resolution and internal gain amplifier of 1,2,4 and8X. interface is the usual i2C. The best part is it is very cheap ;) . the only problem would be the small package making it...
if you are using a single supply, it is better to raise your reference minimum level (output of your op-amp) a little bit above zero to ensure better linearity. you can always subtract the offset at the microcontroller end digitally in your code. as you need a 10 bit resolution, use an ADC...
if you look at the 'adder' configuration of the op-amps, there is a second arm going to the inverting terminal of the op-amp. you can feed a fixed positive voltage 2.2V (using a resistor voltage divider) to that input and the amplified (2.2~2.8V) signal to the positive side. This can eliminate...
Hi friends,
I have a relatively high impedance energy source of about 10~12V,4mA which amounts to about 40mW. Can anyone suggest me a high efficiency power supply circuit ( preferably greater than 80%) which can boost the output current to 10mA at the expense of the output voltage reducing to a...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
