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Low-Cost 8-Channel FET
Configuration |
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72-Bit Noise
Rejection |
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Remote Control Millions of
Devices
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Low-Cost Wireless Computer
Control |
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Up to 3000 Foot Range |
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4 User Programmable Bit Rates |
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Up to 10KBPS Communication
Speed |
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3 User Programmable Device Keys |
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Programmable Power-up Levels |
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Dual Power Connection System |
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10 Status LEDs |
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IMPORTANT NOTICE: |
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Theoretical
ratings shown below. These devices may exceed listed
ratings. If not, you may qualify for free replacement
components. Contact Us for Details. |
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MECHANICAL
DRAWING |
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Pulse Width Modulation |
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1-Amp
8-Channel Light Dimmer |
| Ratings |
Resistive Load |
Inductive Load |
| Voltage |
120 |
12VDC |
| Amperage |
1A |
.5A |
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Low
Voltage Low Current Pulse Width Modulation |
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Stock #: PWMR81W1LR |
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1-9 |
$124/ea |
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10-24
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$119/ea |
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25-99
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$116/ea |
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100+
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$107/ea |
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Hexfet Driver Stage |
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3-Amp 8-Channel Light Dimmer |
| Ratings |
Resistive Load |
Inductive Load |
| Voltage |
24 |
24 |
| Amperage |
3A |
1.5A |
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Low
Voltage High Current Pulse Width Modulation |
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Stock #: PWM83W1LR |
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1-9 |
$144/ea |
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10-24
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$134/ea |
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25-99
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$125/ea |
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100+
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$119/ea |
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256
Programmable Levels |
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5-Amp
8-Channel Light Dimmer |
| Ratings |
Resistive Load |
Inductive Load |
| Voltage |
24 |
24 |
| Amperage |
5A |
2.5A |
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High
Voltage Low Current Pulse Width Modulation |
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Stock #: PWM85W1LR |
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1-9 |
$159/ea |
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10-24
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$149/ea |
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25-99
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$140/ea |
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100+
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$125/ea |
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AirControl AC418LR
Required |
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This Wireless Device is
designed to Accept Commands from the
AC418LR Wireless Data
Transmitter. You will need at least ONE AirControl
Transmitter. |
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AC418LR |
$89 |
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WARNING: RISK OF
ELECTICAL SHOCK WHILE DRIVING INDUCTIVE LOADS. HEAT SINKS MAY
BECOME VERY HOT UNDER NORMAL OPERATION. SERIOUS BURN RISK! |
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Wireless
pulse width modulation controllers allow your computer or
microcontroller to remotely control the brightness of
incandescent DC lights or the speed of DC motors. Eight
on-board channels each have 256 levels of pulse width
modulation control...all from a wireless connection.
Our new LR Series wireless controllers offer reliable
communication up to 3000 unobstructed line of site feet from the
computer. Our EWC wireless networking protocol allows
you to control an UNLIMITED number of remote devices.
Here's how it works. Your
computer connects to the
AirControl transmitter (AC418LR) via the serial port.
The AirControl waits for a command from the computer.
The AirControl then packetizes your command and transmits it
to all devices that are within radio range.
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The PWM8x series controllers
are built around a custom pulse width modulation
processor. This new processor is dedicated to providing
256 levels of pulse width modulation for 8 individual
channels. Coupled with powerful fets, the PWM8x is
capable of controlling 256 levels of brightness for 8
individual light bulbs under computer control. Rated for
use with resistive and inductive loads, the PWM8x is also
a very suitable solution for DC motor speed control
applications. |
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Theory of Operation: |
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The PWM8x has two dedicated
processors: The Interface processor is dedicated to
handling serial commands while the PWM processor is
dedicated to keeping the pulse stream as steady as
possible. When a command is received by the Interface
processor, the PWM chip is flagged. The new command is
copied from the Interface processor to the PWM chip and
the pulse stream starts back up again. The update occurs
in just a few microseconds, and is undetectable to most
real world control applications. The 8 signals generated
by the PWM chip are directly connected to the gates of the
8 N-Channel Hexfets. The Hexfets connect your external
device to ground, then disconnects at very high speed.
You control the speed of the connection/disconnection,
which in turn controls the speed of a motor or the
brightness of an incandescent lamp. |
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Connection: |
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Connecting a DC motor to the
PWM8x is very easy. A typical DC motor has two leads,
positive and negative. Simply connect the V+ of the motor
to the V+ of your power supply, such as a 12V car
battery. Connect the Ground Lead of your car battery to
the Ground Connection on the PWM8x. Connect the Load Lead
on the PWM8x to the Ground Connection of your motor.
Next, connect the QS12 quick start kit (which includes a
serial cable and power supply for powering the logic on
the PWM8x). You are now ready to control the speed of
your motor under computer control. |
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Product Features: |
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The PWM8x is capable of
storing a pre-defined startup PWM patterns. A soft-start
feature gradually raises each of the 8 channels to their
pre-defined PWM duty cycle when power is first applied to
the controller. The instant on feature begins PWM on all
8 channels as soon as power is applied to the controller.
The PWM8x is E3C compliant, allowing up to 256 NCD devices
to share a single serial port. The PWM8x is optically
isolated from the control computer, preventing damaging
voltage spikes. The PWM8x operates at 1200, 2400, 9600,
or 19.2K baud and is capable of controlling each channel
individually or all eight channels simultaneously. |
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Choosing a Controller: |
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The PWM81 is perfectly suited
for automotive lighting applications (except headlights),
such as custom turn signals and interior lighting.
The PWM83 is suitable for
larger lights and small DC motors. The PWM83 offers
the highest current capability of all our controllers, but
is limited in voltage to about 60VDC.
The PWM85 is suitable for
large DC motors found in most robotic control
applications. The PWM85 has the highest voltage
handling capability, but is more limited in current
transfer than the PWM83.
Please see the product manual
for maximum electrical ratings. |
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