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- # Keyboard Converter: Consul 262.5 & VDX 52600
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- ![Terminal with keyboard and the converter](overview.jpg)
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- Arduino project for a keyboard converter between a Zbrojovka Consul 262.5 terminal keyboard and a Videoton VDX 52600 terminal.
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- ## Keyboard: Consul 262.5
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- Terminal keyboard from 1980s.
- It uses a DB25 connector with UART TTL data lines, clock line, +5V primary power and -12V auxiliary power.
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- ## Terminal: VDX 52600
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- VT52 termnial with a DIN5 keyboard connector that dones not use the standard AT keyboard protocol.
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- ## Converter
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- Interfaces the keyboard and the terminal, optionally a USB. These modes of operation are supported:
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- 1. Keyboard and terminal connected: primary standalone mode. Everything is powered from the terminal.
- 2. Keyboard and USB connected: USB keyboard mode. Powered from the USB which acts as a HID keyboard.
- 3. Terminal and USB connected: Serial keyboard over USB mode. Powered independently. Allows sending keystrokes to the terminal over USB serial.
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- ![Converter box](box.jpg)
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- ## Parts needed
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- - Arduino Leonardo
- - Symmetrical boost converter, 5V to +/- 12V
- - Piezo speaker
- - red and green LED + 470 ohm resistors
- - connectors
- - project box
- - (among others)
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- ## Connections
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- *TODO*
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- ### Terminal DIN5
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- Device | Controller | Description
- ---|---|---
- GND | GND | Ground
- +5V | +5V | Power
- Data | 6 | Keyboard data to terminal
- Status | 7 | Status (LEDs) from terminal
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- ### Keyboard DB25
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- Device | Controller | Description
- ---|---|---
- GND | GND | Ground
- +5V | +5V | Power
- -12V | -12V | via a symmetrical boost converter
- Serial out | 3 | UART out from keyboard
- Serial in | 4 | UART in to keyboard
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- ### Box Interface
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- | Controller | Description |
- | ---|--- |
- | 10 | Offline LED |
- | 9 | Online LED |
- | 8 | Speaker |
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