LichtKrant: Difference between revisions

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==== LED board ====
==== LED board ====
The LED board contains the actual display blocks.
The LED board contains the actual pixels, organized in 16 modules of 5x7 LEDs.
Each LED has a red sub-pixel and a green sub-pixel, so it can do colors: red, green, orang


It has a text on it: HXBI80070509.PCN, date 2007-12-28
The PCB has a text on it: HXBI80070509.PCN, date 2007-12-28
 
It consists of 16 blocks of 5x7 LEDs.
Each LED has a red sub-pixel and a green sub-pixel.


The are already electronics on it, consisting mostly of 595 chips (serial shift registers).
The are already electronics on it, consisting mostly of 595 chips (serial shift registers).

Revision as of 09:41, 15 December 2019

Project LichtKrant
350px
Some 3-colour 80x7 pixel moving LED sign
Status Initializing
Contact bertrik
Last Update 2019-12-15

Introduction

Found this lichtkrant on the revspace free stuff table.

Hardware

lichtkrantconnector

It consists of a processor board and a LED board.

Processor board

The processor board has a 8052, a flash chip, battery, 32768 Hz crystal, 40 MHz crystal, Altera Max chip. It appears the Altera chip drives two 245 chips which in turn drive the signal to the connector J1 to the LED board.

It takes 5V as input.

Connector pinout J1

  • 1: pin A8 of IC6 (245)
  • 2: GND?
  • 3: pin A1
  • 4: GND
  • 5: pin A2
  • 6:
  • 7: pin A3
  • 8:
  • 9: pin A4
  • 10:
  • 11: pin A5
  • 12:
  • 13: pin A6
  • 14:
  • 15: pin A7
  • 16:
  • 17: pin A8
  • 18:
  • 19: 5V
  • 20: 5V

So it basically looks like a 9 bit bus. Levels on the bus are 5V (so can we drive it with an ESP?)

LED board

The LED board contains the actual pixels, organized in 16 modules of 5x7 LEDs. Each LED has a red sub-pixel and a green sub-pixel, so it can do colors: red, green, orang

The PCB has a text on it: HXBI80070509.PCN, date 2007-12-28

The are already electronics on it, consisting mostly of 595 chips (serial shift registers).

Links

Possibly useful other info: