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DTR Powered EchoLink Interface - "Tiny Echo"

Advanced, PIC 16F84A EchoLink Interface -"Fox Echo"

Audio AGC add-on Card for Foxecho-K7

 

 

 

 

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 PIC 16F84A Micro Controller EchoLink* Interface

 

FOX ECHO-K7

 


K7SFN

 

 

Click to enlarge


 

K7AGE

 Click to enlarge


Revision: 0808

 

 

Fox Delta: Foxecho-K7 Echolink Interface

 

 

PIC16F84A Micro Controller EchoLink* Interface is designed to achieve some of the following points of Interest to Radio Amateurs:

 

 

Real RS232 signals
100% Galvanic Separation
Plug-in Tone & AGC module (option)
COR (Positive or Negative logic selectable)
Hardware DTMF decoding 
Muting (automatic) of receiver audio
Adjustable receiver and transmitter audio levels
Power status, DTMF, PTT and COR LED's
Uses a PIC16F84A 
DIN 5 Front Panel Connector for easy interface to Rig
Transceiver connection has “HT” Header for portables
No relays. Uses HFE4053 Analog Switches.
12cm x 7cm, Double Sided PTH Board.
Usable for other digital modes like PSK31
A true homebrew project, you can build.
Kit includes an Alum. Enclosure

 

 

Foxecho-K7 interface uses an MT8870 DTMF Decoder and a PIC16F84A. Uses two 4N33 Opto Couplers and two transformers to achieve 100% isolation between transceiver and your PC.

An AGC add-on card is available to effectively control receive audio level and tone.

 

* EchoLink is a registered trademark of  Synergenics, LLC

 


 

Picture of the Completed EchoLink* Interface
 

 

Click to enlarge

 

 FoxEcho-K7 Doc & Firmware

All the documents updated: 10th Sept 08 

                   

Technical Info Doc Fox Echo Schematic & Parts List
Transceiver Connection to DIN5 and Header Details Fox Echo Schematic & Parts List
 
Kit Parts List Fox Echo Schematic & Parts List
Foxecho-k7 Sysop Config. Document Fox Echo Schematic & Parts List
Foxecho-k7 Mic & Header Setup Fox Echo Schematic & Parts List

Schematic JPG
FoxEcho-K7 Schematic & Parts List

Schematic of the Isolated components JPG JPG
 
 Project Resources & Download
    
PIC16F84A Firmware
 
Andreas, DL5MGD's Echolink Webpage Fox Echo Schematic
 
DL5MGD PIC16F84A Firmware
 
Old Version Documents
 

 

 

 Buy on-line
To purchase, please select online credit card buttons or send payments by USPS Money Orders.

For online payments, shipping charges will be added on secure web page, which are from $5.00 upwards for Registered Air Mail, and based on value/weight of the KIT/Assembled.

For Money Order, please refer to table provided on MO web page.

Track your order guide

Countries where we do not sell/forward  
Terms of sales        

 

 
US $ Buy On-Line

  
FoxEcho-K7 Kit with Free Powder Coated Metal Case. (Cases are without silk labels) 59.00


2CheckOut.com Inc. (Ohio, USA) is an authorized retailer for goods and services provided by Fox Delta.

  Kit Packing List  
 

 

 
FoxEcho-K7 Assembled 69.00
      
FoxEcho-K7 PCB Only 5.00
 

 

 


2CheckOut.com Inc. (Ohio, USA) is an authorized retailer for goods and services provided by Fox Delta.

 


Click image on Right if you like to purchase by sending an USPS MO

 

 

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