LichtKrant: Difference between revisions
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* 19: 5V | * 19: 5V | ||
* 20: | * 20: connected to the "ethernet" dipswitch | ||
So it basically looks like a 9 bit bus. | So it basically looks like a 9 bit bus. | ||
Revision as of 15:57, 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
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.
The PCB has a text on it: HXITC017_2.PCB
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: connected to the "ethernet" dipswitch
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 LED modules have the text GYXM-G2357ASRG on them.
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: