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Some of my old electronic designs:

 

OrCAD 386+ files:

*.sch - schematic diagram

*.lib - components library

*.bd1 - PCB design

 

1. ELECTRONIC CONTROL SYSTEM FOR AZ/EL ANTENNA ROTATOR

*** Moon Tracking System without PC ***

- Hardware based on a 80C552 microcontroller.

- Specially designed for EME activities, with a moon tracking algorithm embedded.

- Useful also for  satellites tracking and the usual VHF or HF traffic.

- Analog or incremental position readers jumper selected, AZ or EL independently.

- 7 keys (UP, DOWN, LEFT, RIGHT, RESET/F1, MEM/F2, MODE/F3) keyboard.

- one switch for MANUAL/AUTOMATIC modes switching.

- 10 LED digits multiplexed display (5 digits to display the real AZ/EL antenna position, and other 5 for the computed

position).

- 4 mode indicator LEDs.

Hardware specifications

- 8k non-volatile memory (SRAM with internal battery and time keeper).

- 32k program memory  (EPROM).

- watchdog.

- optical-isolated serial RS232 port for communication with the PC or the GPS unit.

- sound beeper.

- 2 digital inputs (AZ/EL) for incremental position readers.

- 2 10 bits ADC (AZ/EL) for analog position readers.

- power MOSFETs driver bridge.

 

      Functions.doc

ANT.exe - configuration software

 

Hardware files

OrCAD 386+ files:

*.sch - schematic diagram

*.lib - components library

*.bd1 - PCB design

 

ANT.sch

ANT.lib 

 

ANT1.sch

ANT1.lib 

ANT1.bd1 

 

INOUT.sch 

INOUT.lib

 

ANT.pdf - controller board

ANT1.pdf - display and keyboard

INOUT.pdf - input/output interface

 

Firmware files

 

ProView32 (Franklin) files:

 

ANT.c

ANT.bin

 

 

2. POWER SUPPLY 13.8V/30A for the HF transceivers using 4 x LT1083CP .

 

 

PSTS870A.sch 

PSTS870A.lib

PSTS870A.bd1

PSTS870A.pdf

 

3. BEACON CONTROL MODULE with 2K EPROM memory

 

BEACON.sch

BEACON.lib

BEACON.bd1  

BEACON.pdf    

 

AQF.bin - EPROM example: (YO7AQF KN24KV 1W GP ANT BEACON -----)

 

4. TS870 MODIFICATION FOR TRANSVERTER

Disclaimer : I take NO responsibility or liability of any kind for any possible equipment damage or any other inconvenience

resulting from this modification. The user agrees to follow this modification on his own risk and expertise.

This modification was tested only on my TS870 transceiver and it is performing as is described hereinafter.

 

Two small PCBs. One of them is fitted with a connector for transverter.

Appling 13.8V DC on VIN pin of this connector:

- RX pin will be connected to the internal RX line of transceiver.

- HF antenna will be disconnected from the internal RX line of transceiver.

- TX pin will have a low level  RF signal from the internal TX line.

- PA input will be disconnected from the internal TX line.

- a 50 ohm resistor will be added to the PA input.

A new hole must be drilled on the rear panel of  the TS870 transceiver ,between REMOTE connector and

EXT SP jack. (see the picture).

The relays are MEDER DIP05-1C90-51D type.

 

MOD870R.sch

MOD870T.sch

MOD870R.lib

MOD870T.lib

MOD870R.bd1

MOD870T.bd1

MOD870R.pdf

MOD870T.pdf