Difference between revisions of "RGB clock"
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== External resources == |
== External resources == |
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http://www.fairchildsemi.com/ds/MM/MM74HC595.pdf |
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== Pinout == |
== Pinout == |
Revision as of 18:10, 9 January 2012
RGB clock
This is the documentation page for the RGB clock kit.
Overview
Driver PCB for up to 64 common-anode RGB LEDs, or 192 normal LEDs. The PCB is designed for 1:3 multiplexing of the LEDs, and is equipped with 8 74HC595 shift registers (configured as 4 16-bit deep registers), 64 current-limiting resistors (220 Ohm by default) and 3 FETs to switch the cathode groups on-and-off. The PCB is equipped with a bitwizard-standard 20-pin IO connector, designed to work together with our USB-multio PCB, but it is also possible to connect our FTDI-ATmega, USB-bigmultio or Cyclone dev board, or one of your own boards.
Assembling the kit
External resources
http://www.fairchildsemi.com/ds/MM/MM74HC595.pdf
Pinout
SV10 is connected as follows
1 | GND |
2 | GND |
3 | SER0 |
4 | SER1 |
5 | SER2 |
6 | SER3 |
7 | !OE |
8 | LATCH |
9 | !RESET |
10 | CLOCK |
11 | R |
12 | G |
13 | B |
14 | external clock source |
15 | IO1 |
16 | IO0 |
17 | IO3 |
18 | IO2 |
19 | VCC |
20 | VCC |
SV1 through SV8 are connected as follows:
1 | A0 |
2 | A1 |
3 | A2 |
4 | A3 |
5 | A4 |
6 | A5 |
7 | A6 |
8 | A7 |
9 | R |
10 | G |
11 | B |
12 | GND |
SV9 can be used to connect an external clock source, or a servo motor, or...
1 | GND |
2 | VCC |
3 | connected to pin14 form SV10 |
- D2 is connected to VCC from SV10
- D3 is connected to USB power
- D4 is connected to pin17 from SV10
- D5 is connected to pin18 from SV10
- D6 is connected to pin15 from SV10
- D7 is connected to pin16 from SV10
- Switch1 (next to R71) is connected to pin16 from SV10
- Switch2 (next to R72) is connected to pin15 from SV10
- Switch3 (next to R73) is connected to pin18 from SV10
- Switch4 (next to R74) is connected to pin17 from SV10
Jumper settings
JP1: Power supply selection. Open: LED driver board and microcontroller board have individual powersupplies Closed: VCC from LED driver board and microcontroller board are connected.
Future hardware enhancements
- Replace 2 12-pin connectors by 1 20-pin connector
- Add numbers to the pushbutton switches
The software
Changelog
1.0
- Initial public release