User's Manual

ManualsBrandsStanley Black & Decker ManualsElectronicsTool status wireless transmitter module

Transmit Module User’s Manual

-DRAFT-

The WTC TX (Wireless Tool Control Transmit) module

is a 433 MHz transmitter for sending DEWALT WTC

status messages. These messages are commonly used

to signal if a tool is operating which can be used to turn

on and off a remote vacuum or dust extractor

equipped with a corresponding receiver. The WTC TX

module is based on the Microchip MICRF112 UHF

transmitter and the ATTINY416 microcontroller. The

WTC TX module is classified by the FCC as a Single-

modular transmitter which is a complete RF

transmission sub-assembly designed to be

incorporated into another device.

Table of Contents

1. General description

1.1 Simplified block diagram

2. Electrical characteristics

2.1 Circuit activation

3. Compliance information

Summary of content (5 pages)

PAGE 1
Transmit Module User’s Manual -DRAFT- The WTC TX (Wireless Tool Control Transmit) module is a 433 MHz transmitter for sending DEWALT WTC status messages. These messages are commonly used to signal if a tool is operating which can be used to turn on and off a remote vacuum or dust extractor equipped with a corresponding receiver. The WTC TX module is based on the Microchip MICRF112 UHF transmitter and the ATTINY416 microcontroller.
PAGE 2
1.0 General Description The WTC TX module is a transmit only device that is externally controlled, usually from a tool control module. The simple circuit is composed of an LDO, buffer FET, ATTINY416 microcontroller and Microchip MICRF112 FSK data-in/RF out transmitter. Operation: When the buffer FET in the WTC TX receives a logic “high” signal, the transmit circuit is activated. The module immediately sends a “Start” command and starts a 10 second timer.
PAGE 3
2.1 Circuit Activation: In a typical configuration, a constant voltage of +5VDC is applied to J1-Pin 1 and GND applied to J1-Pin 3. When the tool is not operating, J1-Pin2 is pulled to GND by an external circuit. When the tool begins operation, the voltage on J1-Pin2 is transitioned from GND to +5VDC and held high. Once operation ceases, the voltage is then transitioned back to GND. The system then waits 1 second and goes to sleep awaiting another transition. 3.
PAGE 4
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
PAGE 5