• on Test & Measurement
  • Published in issue 5/2008 on page 18
About the article

Display Computer

M16C mini board with graphics, programmable in C and Basic

Display Computer
The prices of graphic displays are dropping, which makes them increasingly attractive for many applications. However, programming a graphic display is distinctly more difficult than programming a text display. Our mini microcontroller board features a new display-on-glass module and a high-performance Renesas M16C microcontroller. The board is available fully assembled, and the microcontroller is pre-loaded with a TinyBasic interpreter to simplify the development of graphics applications – even for novices.
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.

Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.



Resistors (shape: 0805)

R1-R5 = 1kΩ8

R6,R8-R11 = 3kΩ3

R7 = 100Ω

R12 = 100kΩ

R13-R18,R22 = 10kΩ

R23 = 680Ω

R24 = 4kΩ7

R19,R20,R21 = 100Ω


Capacitors (shape: 0805)

C1-C6, C9,C12,C13 = 100nF

C7,C8 = 22pF

C10, C11 = 15pF

C14..C22 = 1µF 16V (ceramic multilayer)



IC1 = M16C29 (Renesas no M30291FC-U5, case: PLQP0064KB-A)

IC2 = NCP1117ST33

IC3 = MAX202CSE (SO-16)

IC4 = SN75176BD (SO-8)

Q1 = 18.432MHz quartz crystal (HC49-SMD)

Q2 = 32.768kHz quartz crystal (SMD)

Q3,Q9 = BC850B (SOT-23)

D10 = LL4148 (SOD-80 MiniMELF)



LCD1 = EA DOG-M128 (Electronic Assembly)

SP1 = CST-931RP/A (lead pitch 4 mm)

JP1,JP2 = 14-way pinheader

JP3 = 10-polige Micromatch-socket strip (pushthrough version, straight)

SW1,SW2,SW3 = solder jumper (preset to ‘RS485’)

PCB, ref. 070827-1 from www.thepcbshop.com)

Ready assembled and tested board including display and pre-programmed microcontroller (bootloader and Basic Interpreter) available from the Elektor Shop, order code 070827-91.


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