28123 Parallax Inc, 28123 Datasheet - Page 126

• Manufacturer Part Number: 28123
• Description: TEXT WHAT'S A MICROCONTROLLER
• Manufacturer: Parallax Inc
• Type: Programmingr

Specifications of 28123

• Style: Book
• Title: What's a Microcontroller?
• Contents: Whats a Microcontroller? Text
• Product: Microcontroller Accessories
• Core Processor: PIC16C57c
• Flash: 128 Bytes
• Operating Supply Voltage: 9 V
• Board Size: 31 mm x 16 mm
• Lead Free Status / RoHS Status: Not applicable / Not applicable

The last
the servo to go to its center position (12 o’clock) for about 3.23 seconds.
Figure 4-17 shows the timing diagram for these pulses. While the low time is still 20
ms, the pulse now lasts for 1.5 ms.
Do the Math
If you want to convert time from milliseconds to a
use this equation.
Vdd (5 V)
Vss (0 V)
Vdd (5 V)
Vss (0 V)
FOR counter = 1 TO 150
NEXT
FOR…NEXT
Duration
PULSOUT 14, 750
PULSOUT 14, 750
PAUSE 20
=
loop delivers 150 pulses, each of which lasts 1.5 ms. This instructs
number
1.0 ms
1.5 ms
of
20 ms
20 ms
sends a pulse that lasts 750 × 2 µs. That’s 1500 µs or 1.5 ms.
ms
×
500
www.parallax.com
standard servo
www.parallax.com
standard servo
Duration
1.0 ms
1.5 ms
you can use for
Figure 4-16
Timing Diagram for 1.0
ms Pulses Every 20 ms
Servo horn in 2 o’clock
position.
Figure 4-17
Timing Diagram for
1.5 ms Pulses Every
20 ms
Servo horn is in 12
o’clock position.
PULSOUT
,