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Hi, actually we have given this task to measure current through PIC. The circuit was also given to us. We have implemented and its working. But i am curious to know that why Transistors are used instead of Bridge rectifier. I am unable to get answer ....
Hi, I am using 220V-6V transformer for the 5V DC power supply. Sorry i didnt tell the values before.
With the same 7805 regulator.
220V 60Hz main supply. Thanks
Hi I have also faced this problem during my project.
Basics steps to receive sms are:
1. Check the PIR1.RCIF regester.
2.Save Memory slot as:
Read:
+CMTI: , <MEMORY SLOT>
3: Use the command: AT+CMGR=
4. Enter memory slot you saved
5. Extract the whole message and save it to array.
6. Delete...
Hi, I have done PIC to PC communication. Did you used MAX232 IC for the data transfer. Because there is a difference in the voltage levels of PC and PIC.
PC are usually RS232 whereas PIC are TTL logic levels. MAX 232 is used to convert these levels. Thanks.
Syed Fahad Wasti
Hi, We have made a circuit to measure current. As we need this current to monitor through PIC.
Here my question is that we have used CT , which takes current at input and generates voltage proportional to it at the output. After it we have used Two Transistors instead of Bridge rectifier. Why...
Thanks Klaus . I have searched for this every where but didnt find any thing. Your answer is very helpful . But i have a question again that why we used 1000uf capacitor as there is a great difference between the calculated value 5700uf and 1000uf.
Because i have made a supply of 5V having...
Hi, I am trying to make a power supply of 5 V as we all know it used a bridge circuit, then capacitors and LM7805 .
But i want to know how the valu of capacitance is calculated. What is tha formula for it?
If the formula is C=It/V
>Then what will be the value of 'I' and 'V'
>What is 't'?
I...
Hi I hv started working on receiving part.
I am observing every step of my working code. When I started to check +CMTI.
It confirms '+'
then 'C'
But it stops after 'C' and did not proceed further.
(Because it should read complete +CMTI so that i can save the slot number.)
Please...
Ok i will try to upload.
I am uploading again sending part, with lcd interfacing.
I just want to show received sms on LCD. Nothing else.
Because i will do the controlling (Turn ON/OFF) part after i received the sms. Thanks
// Lcd pinout settings
sbit LCD_RS at RD2_bit;
sbit LCD_EN at RD3_bit...
Thanks for reply Tanmay Dash,
Actually i am making a project to turn a load ON and OFF (eg. A fan ). I have made complete hardware including, power supplies, interfacing of lcd, sim module. Also i am succesful to send sms, but i am hving difficulty in receiving sms. I am just trying to READ sms...
I didn't used 0X1A,
I think i am not using correct command format for sms sending.
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I am also having trouble in receiving the sms on sim module. Help me using AT+CMGR command . Thanks
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You are using AT+CMGS and mob number together. I will try this code...
This is the part of sending sms code , help me in correcting this. Thanks
UART1_Init(9600); // Initialize UART module at 9600 bps
Delay_ms(100);
UART1_Write(2);
UART1_Write(13);
UART1_Write_Text("AT+CMGS=");
Delay_ms(1000);
UART1_Write(0x22); //...
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