70016 Parallax Inc, 70016 Datasheet - Page 201

• Manufacturer Part Number: 70016
• Description: TEXT INFRARED REMOTE FOR BOE-BOT
• Manufacturer: Parallax Inc

Specifications of 70016

• Accessory Type: Manual
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Boe-Bot®
• For Use With: 29122 - KIT PARTS IR REMOTE FOR BOE-BOT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Figure C-1
Tuning and Testing the 38 kHz Transmit Circuit
Test555Frquency.bs2 sets P6 high to enable the 555 timer, at which point its Out pin will
start sending high/low signals. P7 is connected to the 555 timer's Out pin, and the
command
signal in 100 ms. The command
number of cycles per second, which is then displayed with a
potentiometer can then be adjusted for a target 555 timer output frequency of 38 kHz.
Example Program: Test555Frquency.bs2
' IR Remote for the Boe-Bot - Test555Frequency.bs2
' Displays 555 timer frequency for potentiometer adjustment and tuning.
' {$STAMP BS2}
' {$PBASIC 2.5}
cycles VAR Word
DO
HIGH 6
COUNT 7, 100, cycles
√
√
Enter, save, and run Test555Frequency.bs2
Adjust the potentiometer knob with a screwdriver until the Debug Terminal
reports a frequency in the 37 to 39 kHz range (your target frequency is 38.0
kHz).
COUNT 7, 100, cycles
cycles = cycles * 10
stores the number of times it sends the high/low
gives adjusts the value to the
DEBUG
command. The