‰  NOW 25 WPM  ‰  TEXT IS FROM MAY 2015  QST  PAGE 32 ‰

CONVENIENT CALIBRATION SCHEME BECAME APPARENT TO ME BY DIVIDING THE ADC BY
6, SO WHEN ADC 900, THE RESULT, 900/6 150 DECIVOLTS, OR 15 V FOR EASY
CALIBRATION.  TO CALIBRATE, APPLY 15 V TO THE INPUT, AND ADJUST R4 UNTIL
THE PICAXE SHOWS 150 DECIVOLTS.  MY PROGRAM SENDS THIS VALUE VIA SERIAL
CONNECTION TO THE ATTACHED COMPUTER AFTER THE PROGRAMMING IS DONE AND THE
PROGRAM BEGINS RUNNING.  IT IS INTERESTING TO RUN THE PROGRAM ON THE
SIMULATOR THAT THE PICAXE EDITOR PROVIDES EVEN WITHOUT THE CIRCUIT
CONNECTED.  THE SIMULATOR SHOWS A DIAGRAM OF THE PICAXE CHIP PINS WITH
INDICATION OF THEIR HIGH OR LOW STATUS, AND ALSO SHOWS THE CONTENTS OF
REGISTERS.  YOU CAN ENTER VALUES FOR ADC NUMBERS AND SET PINS HIGH OR LOW,
AND THE RESULT WILL SHOW IN THE REGISTERS.  THIS ALLOWS DEBUGGING AND
EVALUATION OF THE OPERATION BEFORE BUILDING THE CIRCUIT.  PROGRAM DOWNLOAD
BEGINS WHEN THE PROGRAMMING CABLE IS CONNECTED AND POWER IS TURNED ON.  THE
‰  END OF 25 WPM TEXT  ‰  QST DE W1AW  ƒ