home // Telecommunications // Transmitter
NOTES: TRANSMIT DATA BUFFER RADIO RECEIVER RADIO TRANSMITTER ...
Source: www.stanford.edu
File Size: 11.29 KB
Category: Telecommunications
Last Download : 34 days 22 hours 59 minutes ago
Share this info:
Click Image to enlarge
Short Description: RADIO TRANSMITTER. COMPUTER SERIAL RS-232 INTERFACE. AVR UART/OTHER INTERFACE. RECEIVE DATA BUFFER. 1. The radio transmitters and receivers used by this ...
Content Inside: 5 4 3 2 1 COMPUTER SERIAL RS-232 INTERFACE TRANSMIT DATA BUFFER RADIO TRANSMITTER P1 VCC U1 1 6 D D SER_RXD 2 U2A U2B 1 8 GND1 GND4 7 SER_TXD E1 3 1 2 3 4 2 7 DATA VCC TX ANTENNA 8 R1 10K 1 4 3 6 GND2 GND3 9 74HCT04 74HCT04 5 4 5 LADJ ANT SERIAL RS-232 DB9-F R2 TXM-418-LC 430 NOTE: Be sure to connect power to the AVR UART/OTHER INTERFACE 74HCT04 inverter. RADIO RECEIVER C JP1 E2 C RX ANTENNA 1 VCC -> Pin 14 U3 1 2 GND -> Pin 7 Connect JP2 to AVR PORTD HEADER 2 VCC 1 16 NC ANT for AVR UART operation U2C 2 15 NC GND2 JP2 AVR_TXD 5 6 R3 3 14 1 2 200 NC NC 3 4 4 13 5 6 GND1 NC RECEIVE DATA BUFFER 7 8 74HCT04 5 12 9 10 VCC NC HEADER 5X2 6 11 PDN NC U2D U2E U2F 7 10 NC NC B B AVR_RXD 8 9 10 11 12 13 8 9 DATA NC RXM-418-LC-S 74HCT04 74HCT04 74HCT04 NOTES: 1. The radio transmitters and receivers used by this design are Linx Technologies LC-series radio products. Maximum bit rate is 4800bps. Typical range will be 50-150ft (16-48m). It may be possible to use more powerful or faster modules as well; see Linx Technologies. 2. This circuit may run at VCC=3V or VCC=5V. VCC=3V: R2= 0 ohms, R3= 0 ohms VCC=5V: R2=430 ohms, R2=200 ohms Pascal Stang - Copyright 2002 A Procyon Engineering A 3. You may build either of the two interface circuits above, or Title both. If you use both, only one of the two serial interfaces 315/418/433MHz Radio Data Transceiver can control the transmitter. By default, the computer serial interface controls the transmitter. To allow the AVR UART Size Document Number Rev A 19-11-2002-0001 A interface to transmit, place a jumper block across JP1. Date: Tuesday, November 19, 2002 Sheet 1 of 1 5 4 3 2 1
Sponsored Links
Related Search Terms: