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I am using pic24fj64ga002 controller UART. I am able to communicate with PC when I transmit/receive one character to PC. But my intention is to get a string from PC and process it in microcontroller. However, I am getting a weird problem. When I am sending more than 5 characters, eg. abcdefg, I...
I do not have a circuit simulator, however, my connections are simple:
connections- 5-ground,4-ground,7->+2.5V(+V),2-ground,3->0.0001V(input DC voltage to be amplified). resistance(RG between pins 1,8 ) = 12k ohm. It works when 4 pin is connected to -2.5V. But in actual circuit(ECG), i would...
I am planning to use INA 333 opamp for amplifying the low voltages(in microvolts) given out by sensors. But as my device is battery operated, i am unable to provide +(7 pin) and -(4 pin) voltages. I want to operate my circuit in a single supply mode instead of dual supply. As specified in...
Hello,
I want to design a voltage source of with voltage ranges from 100 microVolts to 1 mV. I want it for biomedical instrumentation(EEG/ECG). I was thinking of voltage divider but that would not work because of resistance and supply noises. Please suggest me some better way.
I am using pic 10f206 microcontroller.
My intention is to store some variables into program memory and change them during run time depending upon some conditions.
And finally, since those variables are stored in flash, when I power up the microcontroller again, I should get the updated values.
i want to know the difference between RS485 and I2C. I want to compare the two protocols in terms of advantages/disadvantages, datarate, robustness since both are 2 wire.
How about implementing /communicating devices using an Ethernet cable. I am planning to use PIC 24fj 64 family of...
Hello I am trying to generate list file to view the memory and variables mapping.
I am using MPLAB IDE 8.56. After running the program, I am able to view .map,.hex,.coff files but not .lst file. I am using PIC24fj64002 family of microcontrollers.
I am surveying various articles on zigbee and comparing it with other alternative technologies. I read application of zigbee as 'remotely monitoring various types of sensors for air conditioning, lightening, smoke alarms etc.' Also, zigbee is a low power, low data rate, low distance...
Hello,
I have two zigbee modules and I want to configure one as coordinator and other as end device. I have checked the module sheet by maxstream and they have addressing options as PAN ID, channel and address.
I am not able to understand the difference between PAN ID and address.
Also, i m...
Thanks keith1200rs,
But will it change for offsetted sinewave? This is because, when we consider a square wave it is 0 to 5V. In the diagrams and explanation of slew rate, as shown in https://www.amplifier.cd/Tutorial/Slew_Rate/SlewRate.htm of the square wave , they have not shown negative...
The slew rate of the opamp we consider Vp or Vp-p rite i.e.
SR = 2*pi*fmax*Vp-output
or
2*pi*fmax*Vp-p-output ?
my sine wave is of form Vout = 2.5(1+sin(wt)).
and by this, Slew Rate required for my circuit = 15.7V/us which is less than the one specified in datasheet(17V/us). So, would the...
Hello,
I was previously using LM1117 interface for interfacing. I was using Max 232 to get data from PC to microcontroller and interfaced lm1117 between microcontroller and zigbee connection. So, if i use Max3223 (and connect tx,rx and ground of PC)and Zigbee module directly, will i be able to...
Hello,
I have implemented the project part by part and during integration, i found that I m falling short of IOs. So, I am shifting from atmega32 to atmega128. will there be any problmes in this transistion. what precautions or extra points should i consider which making this shift?
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