NEW
Advanced Data Logging Software NEW Data-Logging Software
& ActiveX Controls |
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| **** Single-Channel Serial Volt-Meter with 8-Bit Precision **** | |||||
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Use your PC and the simple A/D circuit shown below, and turn your PC into a powerful analog voltage meter with full data logging, and viewing capabilities. Our custom voltmeter software accepts serial data from the BASIC Stamp I, II, or other microcontroller and displays the voltage onscreen for you to analyze, view, and log to a file. If offers full logging of each reading as it's received complete with the date & time stamp for each individual reading. Here's a sample of the log file recorded while adjusting a potentiometer attached to the input of the ADC0831.
Data logging: Each time your program sends a reading to your PC, RenVoltmeter will log each analog value complete with the date & time stamp. The 8-bit received via your PC serial port is automatically converted into an onscreen voltage display similar to that of your average multi meter. The bar graph below the numeric readout also moves with the input voltage readings to provide you with an analog look and feel. To change the time each log entry is made, simply change to pause times in your code, or process other tasks until you need to take the next reading. Enable/Disable Log Feature: RenVoltmeter lets you toggle the logging feature on/off by simply placing a check mark in the Enable Log check box. To start RenVoltmeter, simply click on the RED LED. The LED will turn green and the display will begin to update each time a new reading is received from the serial port.
Below is the simple code for using the BASIC Stamp I. |
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' BASIC Stamp I program that uses the National ADC0831 to acquire ' analog data and output it via RS-232. Symbol CS = 0 Symbol AD = pin1 Symbol CLK = 2 Symbol S_out = 3 Symbol data = b0 Symbol i = b2 setup: let pins = 255 'Pins high (deselect ADC). let dirs = %11111101 'S_out, CLK, CS outputs; AD input. loop: gosub conv 'Get the data. serout S_out,N2400,(#b0,13,10) 'Send data, CR, LF. pause 2000 'Wait 2 seconds goto loop 'Do it forever. conv: low CLK 'Put clock line in starting state. low CS 'Select ADC. pulsout CLK, 1 '10 us clock pulse. let data = 0 'Clear data. for i = 1 to 8 'Eight data bits. let data = data * 2 'Perform shift left. pulsout CLK, 1 '10 us clock pulse. let data = data + AD 'Put bit in LSB of data. next 'Do it again. high CS 'Deselect ADC when done. return |
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Use the simple circuit shown below for the BASIC Stamp I or BSII |
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' BASIC Stamp II Interface for the ADC0831 ' 8-bit analog-to-digital converter ADres var byte ' A-to-D result: one byte. CS con 0 ' Chip select is pin 0. AData con 1 ' ADC data output is pin 1. CLK con 2 ' Clock is pin 2. baud con 16468 ' N9600 high CS ' Deselect ADC to start. again: low CS ' Activate the ADC0831. shiftin AData,CLK,msbpost,[ADres\9] ' Shift in the data. high CS ' Deactivate '0831. pause 500 serout 3,baud,[ADres] pause 1000 goto again ' Do it again. |
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Use the circuit below for the PIC12C671 |
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 Using the 8-Pin PIC12C672 |
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Below is the code for using the PIC12C672 & PicBasic. Click HERE for a detailed article on using the PIC12C672 with PicBasic. if you don't have PicBasic yet, click HERE for our excellent offer on PicBasic & PicBasic Pro. |
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'------------------------------------------------------------------------- ' PIC12C672 A/D SAMPLE ROUTINE FOR TESTING '------------------------------------------------------------------------- ' PIN NAME USE/CONNECTION ' 1 Vdd +5VDC ' 2 GPIO.5 N/C (NO CONNECTION) ' 3 GPIO.4 N/C ' 4 GPIO.3 N/C ' 5 GPIO.2 N/C ' 6 GPIO.1 SERIAL OUTPUT TO PC ' 7 GPIO.0 1K RESISTOR TO CENTER OF 5K POT ' 8 VSS GROUND '------------------------------------------------------------------------- DEFINE OSCCAL_2k 1 'SET OSCCAL FOR PIC12C672 RESULT VAR BYTE 'A/D CONVERSION RESULT STORAGE BYTE ADCON1 = 6 'SET GP.0 TO ANALOG INPUT, Vref = Vdd, ALL ELSE = DIGITAL I/O MAIN: GOSUB GETVAL 'SETUP A/D PAUSE 1000 'PAUSE FOR 1 SECOND SEROUT GPIO.1,N2400,[RESULT] 'SEND A/D CONVERSION RESULT TO THE PC SERIAL PORT PAUSE 1000 'PAUSE FOR 1 SECOND GOTO MAIN GETRESULT: PAUSEUS 50 'WAIT FOR A/D CHANNEL SETUP (50 uS) ADCON0.2 = 1 'START CONVERSION BY SETTIN GO/DONE-BIT (HIGH) LOOP: 'WAIT FOR GO/DONE BIT TO BE CLEARED IF ADCON0.2=1 THEN 'CHECK GO/DONE BIT (0=DONE) GOTO LOOP 'NOT FINISHED CONVERTING, THEN LOOP UNTIL DONE ENDIF 'IF STATEMENT SATISFIED, ADCON.2 = 0 (DONE) RETURN 'FINISHED CONVERSION, RETURN TO GETVAL ROUTINE GETVAL: ADCON0=%10000001 'SET FOSC/32,CHANNEL 0 (GP0/AN0) GOSUB GETRESULT 'START THE CONVERSION RESULT = ADRES 'STORE THE A/D RESULT IN RESULT RETURN 'RETURN TO MAIN ROUTINE, START OVER END 'END PROGRAM |
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**** Complete ready to run software, or ActiveX Control **** |
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Purchase the ready to run version with complete installation & setup, or the ActiveX control. The ActiveX control lets you design your own custom version of RenVoltmeter. The ActiveX control is extremely simple to use, and only requires a few simple lines of code for a complete PC serial voltage meter with data logging features. Simply add the custom OCX control file to your project, and drag & drop the control onto your form. Below is all the code you'll need to enter to have a full blown operational version. |
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Note: You will need the Professional version of Visual Basic that includes the MSComm control. The learning versions of Visual Basic do not include the MSComm control. |
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......."Get Your Own Copy"...... |
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As with all of our software, you will receive any upgrades or enhancements 100% FREE. When we complete an upgrade, we will notify you and forward instructions on how to obtain the latest versions absolutely FREE of charge. Important Note: Note: We send download locations & passwords to you manually once we receive your order. Please be patient. It may take us a few hours to email you download instructions. Orders placed on weekends, or after normal business hours (9 to 5 Mon-Fri), will normally be processed on the following day, or Monday if placed during the weekend. Double check your email address when you fill in the order forms using the order buttons below.
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| Option #1: (For Download) RenVoltmeter Custom ActiveX Control |
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| Option #2: (For Download) "Ready to Run" Volt-Meter Data-Logging Program |
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| Option #3: (For Download) ActiveX Control + PIC12F683 Serial A/D IC |
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| Option #4: (For Download) "Ready to Run" Volt-Meter Data-Logging Program + PIC12F683 Serial A/D IC. |
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