Browse over 10,000 Electronics Projects using the Page Numbering provided at the bottom of each Page.

R5000 Computer Interface

R5000 Computer Interface

This circuit is a modified version of an original interface on QSL Net. It is a fully isolated interface allowing computer control of the Trio or Kenwood R500 receiver. Separate software is needed to control the receiver.
The R5000 receiver is an all-mode full featured receiver covering 30-30MHz. This receiver is now discontinued but there are still plenty to be found on the second hand market. It has an analogue field strength meter, two built-in noise reducers and a 6 Pin DIN output on the back panel. It is this DIN connector that interfaces to your humble PC allowing software control over the receiver.

The R5000 receiver outputs are TTL level compatible, but to interface to the PC serial port, RS232 standards are required. All the work is done here by the MAX232 IC working from a single %V regulated supply this IC will buffer and shift the TTL levels of the receiver to the standard required by the RS232 serial port. The output signals are shown correctly wired for a 9 Pin D type connector, most PC have at least two of these connectors on the rear.

The signals from the R5000 receiver are physically isolated by 4 opto-isolators, SFH618. The receivers transmit and Ready to Send (RTS) outputs have series 150 ohm resistors before the isolators. The receive and Clear to Send (CTS) inputs, are fed direct to the opto isolator inputs. All the opto-isolator does is relay on/off conditions between input and output, but as there is no direct connection between input and output, physical and spacial separation is achieved.

Visit Here for more.

 

More Articles to Read

Single-Sided USB Charger
Single-Sided USB Charger
A FPGA controlled RGB LED MATRIX for Incredible Effects – the Hardware
A FPGA controlled RGB LED MATRIX for Incredible Effects – the Hardware
Using Nanotimers to Reduce IoT System Power Consumption by an Order of Magnitude
Using Nanotimers to Reduce IoT System Power Consumption by an Order of Magnitude
Replace a microwave’s beeping with the Windows XP startup sound
Replace a microwave’s beeping with the Windows XP startup sound
A DIY Laser Scanning Microscope
A DIY Laser Scanning Microscope
Reverse-engineering the surprisingly advanced ALU of the 8008 microprocessor
Reverse-engineering the surprisingly advanced ALU of the 8008 microprocessor
ESP8266 LED lighting: QuinLED v2.6 PCB
ESP8266 LED lighting: QuinLED v2.6 PCB
Switching LVDS Graphics in a Laptop Computer
Switching LVDS Graphics in a Laptop Computer
Teleknitting: TV-based string art
Teleknitting: TV-based string art
DIY Bubble Machine
DIY Bubble Machine
Start your day with Nerf target practice!
Start your day with Nerf target practice!
Teardown of a Peaktech 6225A
Teardown of a Peaktech 6225A

Top




Shares