EVAL-XXX-LC Datasheet, PDF (2/5 Pages) List of Unclassifed Manufacturers – LC SERIES BASIC EVALUATION KIT USER’S GUIDE

LC TRANSMITTER EVALUATION BOARD
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1. Battery - 3VDC (use a CR2032-style battery only)
2. Power Switch
3. Continuous ON Switches
4. Momentary Pushbuttons - S0 (D0), S1 (D1)
5. Prototyping Area
6. Breakout Header
7. Reverse-Polarity SMA Antenna Connector
8. LC Series Transmitter Module
9. MS Series Encoder
LR RECEIVER EVALUATION BOARD
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Batteries - 3VDC (use 2 AAA style batteries only)
Power Switch
Prototyping Area
Breakout Header
LR Series Receiver Module
MS Series Decoder
Reverse-Polarity SMA Antenna Connector
LED - D1
Buzzer - D0
THEORY OF OPERATION
TRANSMITTER EVALUATION BOARD
The transmitter board is powered by an on-board 3V CR2032 lithium battery. It
has two SPST pushbutton switches, the state of which is encoded into a data
stream using a Linx MS Series encoder. If a switch is closed, the transmitter will
be enabled while the encoder captures the pushbutton states for encoding and
transmission. The encoder will power down the transmitter when the button is
released. Only the two switches that control the LED and buzzer on the receiver
board have been populated, but if it is desired to use all eight data lines, then the
Omron B3S-1002 or equivalent switches can be used. All of the data lines have
been wired out to the header to the right of the prototyping area and can be
accessed for use with other switches, contacts, or microcontrollers.
RECEIVER EVALUATION BOARD
The receiver board is powered by two AAA batteries. The LR Series receiver
exhibits a sensitivity of greater than -112dBm, so under optimum line-of-sight
conditions, the transmitter / receiver link can operate over distances of up to
3,000 feet. The data recovered by the LR Series receiver is decoded by a MS
Series decoder, and the data lines are updated to match the state of the data
lines (or pushbuttons) on the transmitter board. To demonstrate this, one data
line is used to drive a LED while another is used to activate a buzzer. This board
also has a prototyping area with all of the receiver and decoder lines brought out
to a header.
USING THE KIT
Using the kit is straightforward. Simply attach the antennas, turn on the power,
and press one or both of the buttons on the transmitter board. When S0 is
pressed, the buzzer will sound; when S1 is pressed, the LED will turn on.
DEVELOPMENT USING THE PROTOTYPING AREA
In addition to their evaluation functions, the boards may also be used for actual
product development. They feature a prototyping area to facilitate the addition of
application-specific circuitry. This area has a connection to V_CC at the top and
ground at the bottom that can be used to power the added circuitry.
NOTE: The CR2032-style battery on the transmitter board has very low current capacity
with, only about 3mA available for external circuitry. If added circuitry requires a higher
current, the battery must be removed and the board powered from an external source.
The holes are plated and set at 0.100” on center with a 0.040” diameter, making
it easy to add most industry-standard SIP and DIP packages to the board.
On the transmitter board, the data lines from the encoder have been wired out to
a row of plated holes on the right side of the prototyping area. On the receiver
board, the data lines from the decoder plus the RSSI, PDN, and DATA lines from
the receiver have been wired out. This allows for easy access to connect
external circuitry to the modules, the encoder, and the decoder. Data line D0 is
connected to the buzzer and D1 is connected to the LED.
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