A simple Badge PCP with 9x9 LEDs. Create symbols, figures, pxiel-art by just soldering LEDs to the spots you want. No programming needed.
| Designator | Package | Quantity | Designation |
|---|---|---|---|
| BT1 | 2-Pin Connector | 1 | Battery-Holder (2x AAA) |
| C1, C2 | 100n F | 2 | |
| C3 | 0805 SMD Capacitor | 1 | variable (see capaictor table) |
| D1-D81 | 0805 SMD LED | 1-81 | LED Red |
| Q1-Q9 | Mosfet | 9 | 2N7002 |
| R1, R2 | 0805 SMD Resistor | 2 | 100k Ohm |
| R3-R11 | 0805 SMD Resistor | 9 | variable (see resistor table) |
| SW1 | SMD Switch | 1 | |
| U1 | SOIC-8 NE555 | 1 | |
| U2 | SOP-16 CD4017 | 1 |
The frequency can be set by different capacitors for C3. Always on: The frequency is so fast, it looks like all (soldered) LEDs are always on.
| Frequency | Capacitor Value (C3) [F] |
|---|---|
| slow | 1µ F |
| always on | 10n F |
Depending on the ammount of soldered LEDs per row and depending on the color of the row, you need different resistor sizes (see table below). Carefull: You can only chose one LED-Color per row!
| # LEDs | Resistor Value (R3-R11) [Ohm] | LED-Color |
|---|---|---|
| 1 | 27 | red |
| 2 | 13 | red |
| 3 | 9,1 | red |
| 4 | 6,8 | red |
| 5 | 5,1 | red |
| 6 | 4,3 | red |
| 7 | 3,9 | red |
| 8 | 3,3 | red |
| 9 | 3 | red |
TBD
- PCB-Layout: CC-BY-SA 4.0 - Thomas Schmid and Timo Schindler
- Manual (TeX): LPPL - Marei Peischl
- Manual (pdf): CC-BY-SA 4.0 - Binary Kitchen e.V.
A big thank you goes to Thomas Schmid, Clemens Grünewald and Sandra Schweighart for alle the help!
Frequency-calculation done with https://ohmslawcalculator.com/555-astable-calculator
The Logos to the PCB are created with an Inkscape plugin
- download and install https://github.com/badgeek/svg2shenzhen
- Inkscape: Extensions -> svg2shenzhen -> Prepare Document
- Choose Layer where to place the logo
- Rename: remove "disabled" from layer-name
- Place logo
- Extensions -> svg2shenshen -> Export Kicad (Kicad-module)
- Copy .kicad_mod in .pretty-folder
- Place as Part