BYONICS TinyTrak4 User manual

BYONICS
TinyTrak4 DK Adapter
Manual version 1.3
The TinyTrak4 DK adapter is a small circuit board designed to ease the connection of a display and a
PS/2 Keyboard to the TinyTrak4 kit and surface mount built units. It is available as a kit, or as a built
unit.
The components of the TinyTrak4 DK adapter are:
•The printed circuit board
•1x16 0.1” header socket (to be mounted to the PCB)
•1x16 0.1” header posts (to be mounted to the
display)
•2x5 right angle 0.1” header posts (for the ribbon
cable connection) See Note below
•PS/2 PCB mount socket (for the keyboard
connection)
•10K variable resistor / potentiometer (for display
contrast adjustment)
•0.1uf capacitor
•62 ohm resistor (sometimes included with the
display)
•6” 10 conductor ribbon cable with 2x5 IDC
connectors on each end
Assembly is fairly straightforward. The included image should help with component placement. All
components should be added to the printed side of the PCB. The 1x16 header posts should be
inserted from the underside of the display, with the shorter post through the holes, and soldered on
the top side of the display.
Note: It is recommended that the ribbon cable be connected to the 2x5 right angle header posts (on
the straight side) before soldering to insure the header does not sit too close to the circuit board
The ribbon cable should be connected with the red stripe nearest the variable resistor. Either side of
the ribbon cable can be connected to the adapter. The other side of the ribbon cable can be
connected directly to J9 on the built TinyTrak4 with surface mount parts as shown below. Note the
red stripe on the
ribbon cable should
be nearest the center
of the PCB. The
ribbon cable can be
replaced with a
longer cable if
desired, up to 15 feet.

This adapter can also be used with the kit version of the TinyTrak4 with through hole components.
There is not a connector for connection, so instead the ribbon cable should be soldered directly to
pins on the underside of the TinyTrak4 circuit board, as shown below.
This chart shows how the connections are made.
Through hole / Kit
version (PCB v6)
Surface mount / Built TT4 JP9,
adapter 2x5, ribbon cable.
Function
C17 + Pin 1 (red stripe) +5 Volts
C17 - Pin 2 Ground
U1 pin 22 Pin 3 Display Data4, PORTC0
U1 pin 23 Pin 4 Display Data5, PORTC1
U1 pin 24 Pin 5 Display Data6, PORTC2
U1 pin 25 Pin 6 Display Data7, PORTC3
U1 pin 26 Pin 7 Display RS, PORTC4
U1 pin 27 Pin 8 Display E, PORTC5
U1 pin 28 Pin 9 Keyboard Clock, PORTC6
U1 pin 29 Pin 10 Keyboard Data, PORTC7
The 6 pin mini DIN jack can take any PS/2 computer keyboard, as shown below.

Load a firmware file into the TinyTrak4 that supports the display and keyboard, such as the Alpha
firmware version 0.52 and later.
Don’t be surprised if nothing appears on the screen at first. It may be the contrast pot on the adapter.
Some displays, such as the one sold by Byonics, do not need a contrast control, and instead should
be set to ground by rotating the pot fully clockwise.