Creative NachBau V02-Board Assembly Instructions Manual
NACHBAU Assembly Instructions
Author: Christian Aschof, cascho@mac.com
Version 0.4 from August 10, 2012
Translator: Hesky Fisher, hesky@wyolum.com
These instructions are for:
The NachBau_V02-Board was built
from:
to:
To-Do:
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These instructions are for the assembly of a NachBau_V02-board.
The NachBau_V02 (NachBau is German for „replica“) is an LED matrix
display driver. This means that one can use it to control a 16x16 LED
matrix display (i.e. 256 LEDs). The LEDs are driven via multiplexing.
The NachBau_V02 board also has clock support. It has a battery-backed
real time clock and can update the time, based on the DCF77 time
signal from the German National Physics Lab in Braunschweig.
Finally, the board can be chained: one can connect multiple boards
and control several 16x16 LED matrices to make larger displays.
The board is therefore especially suitable for:
• Clock projects, such as word clocks, clocks with scrolling text, binary clocks, etc.
• Large-format versions of games, such as Pong, Maze or other low resolution games (see also the Mignon Game Kit from Olaf Val).
• Display projects, such as tickers, temperature displays, advertising, etc., especially when the displayed text is time dependent (e.g., automatic
displays of „We're open“ / „We're closed“ driven by opening hours, etc.)
The idea for this board came from the QLOCKTWO replica project. There are instructions at http://code.google.com/p/grosses-bastelwochenende on
how to assemble a word clock from many parts. To somewhat tame the chaos and failure rate, Justin and Anool from WyoLum redesigned and streamlined the boards. The three boards from that project (control board, anode multiplexer, cathode multiplexer) plus the Really Bare Bones Board from
Jee-Labs/Modern Devices are now combined in this one board.
The boards and the associated circuits are released as Open Hardware. The plans and Gerber les can be found at http://code.google.com/p/clockthree/.
The ATMEGA328 chip from the kit is compatible with Arduino and can be reprogrammed for use in your own projects using an FTDI cable and the
Arduino IDE. Sample code can be found at http://code.google.com/p/grosses-bastelwochenende/.
Cool, no? So then: Warm up your soldering iron and let's go. Or as Yoda already said in the QLOCKTWO Replica project:
May the force be with you.
i
Safety Notices
Soldering irons, hot glue guns, hot glue and hot-air
guns are hot, as the names imply. Cleaning agents,
especially rubbing alcohol, are ammable.
During assembly you will be exposed to voltages
and current. If the NachBau_V02-Board is powered
by a battery or DC adapter (the recommended
way), then this won’t be a problem. However, using
a built-in AC power supply exposes you to mortal
danger.
The assembly of the NachBau_V02-Board is dangerous. Carpet knives, scalpels, glass edges and drill
bits are sharp. SMD tweezers and drill bits are
pointy. Snipping o the legs of components send
sharp pieces of wire ying around. These can harm
your eyes.
If you use „super bright“ LEDs then you must never
look directly at the LEDs, especially while uploading
the rmware, since random lights may turn on due
to junk data in the shift registers.
An LED matrix driven by multiplexing operates at
high frequency and causes electromagnetic interference in the form of radio waves. This currently
interferes with the DCF77 receiver, which we plan
to x. For other things that might be disturbed by
such interference (e.g. pacemakers) you must take
your own precautions.
Solder fumes, cleaning agents, sanding dust, glue,
paint, etc., are almost always toxic.
In conclusion: The assembly of a NachBau_V02-Board
is in every way dangerous. It is advisable to wear eye
protection, gloves and to have a rst-aid kit ready.
So, man or mouse? Right. The life of a tinkerer is
dangerous in and of itself. So, use your head, work
carefully, and press on.
Version history
Links
V 0.1 24.4.2012 Created.
V 0.2 2.7.2012 Resistance values adjusted (the colors were wrong).
V 0.3 11.7.2012 Page 8: Adjusted resistor values; Page 15: Claried empty resistor slots.
V 0.4 10.8.2012 Removed color values of resistors.
Current rmware and related les: http://code.google.com/p/grosses-bastelwochenende/
Wyolum (distributor of the board and kit): http://wyolum.com
Schematics and Gerber les: http://code.google.com/p/clockthree/
Author‘s blog: http://christians-bastel-leben.blogspot.com/
Arduino: http://www.arduino.cc/
Jee-Labs (RBBB/USB-BUB): http://jeelabs.org/
Reichelt: http://www.reichelt.de/
Pollin: http://www.pollin.de/
Layout of the board
Real time clock (DS1307, crystal, cattery holder for CR2032, pull up resistors)
ATMEGA328-MCU with crystal/resonator
Power supply (voltage regulator, power jack,
capacitors, blocking diode)
Status LEDs with
resistors
5 buttons (Mode, H+, M+,
Enter, and Reset) with pull
down resistors
Anode multiplexers (shift
registers, Darlington arrays,
ltering capacitors, terminal
block)
Cathode multiplexers
(shift registers, current
limiting resistors,
terminal block)
FTDI and ISP
Headers for
rmware
updates
3.3 Volts
for DCF77
Prototyping
Area
Photoresistor
and resistor as
voltage divider
Stack-L
(for larger
matrices)
Stack-R
(for larger
matrices)
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