2 layers89 × 35 mm
2 layers180 × 54 mm
Nametag
onitake/pcb-workshopKiCad PCB layouting workshop
- Size
- 180 × 54 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 116
- Nets
- 18
- Pads
- 249
- Tracks, vias
- 407, 10
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 11 Apr 2016
- Updated
- 6 Jul 2016
Overview
Nametag is an open-source printed circuit board by onitake, from the onitake/pcb-workshop repository on GitHub. It is a 2-layer board of 180 × 54 mm with 116 parts on 18 nets, routed with 407 tracks and 10 vias.
Its parts include 100 diodes, 6 resistors, 5 transistors, 1 capacitor and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
README
README.mdPCB layouting workshop
These are the example files and a short presentation for an introduction to printed circuit board layouting with KiCad.
The design is loosely based on Larry Ogrodnek's nametag, with some modifications and enhancements. There's both through-hole and SMD versions. The THT version is designed for 5mm LEDs, thus making it very large. A new 3mm version is being worked on.
The software for the microcontroller is in a separate project.
You can also find an example for a LED dot matrix display tag. (currently broken, the pinout is wrong)
Description
The circuit is grouped in 4 parts:
- 5 LED blocks
- Transistor drivers for each block (based on 2N7002 N-FETs)
- ATtiny13 microcontoller
- CR2032 battery
Each block consists of a total of 20 LEDs in parallel, which can be soldered on as desired.
It should be noted that the CR2032 has a high internal resistance and can only deliver small currents, up to about 40mA.
The current-limiting resistors for each block should thus be adjusted accordingly, to prevent brown-out of the MCU. Note that the transistors also have a relatively high on resistance.
If a Li-Ion or LiPo battery is used instead of the button cell, much higher currents are possible.
The parts are fairly standard and can be ordered from any supplier, such as Farnell, DigiKey, Reichelt, ...
License
This documentation is copyright © 2016 by Chaostreff Basel and describes Open Hardware and is licensed under the CERN OHL v. 1.2. Please see the the LICENSE file for applicable conditions.
The author's contact information can be found in AUTHORS.
Parts
116| Qty | Value | Footprint | References |
|---|---|---|---|
| 100 | LED | LEDs:LED-5MM | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D100 +84 |
| 5 | 0 | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R1, R2, R3, R4, R5 |
| 5 | 2N7002 | TO_SOT_Packages_SMD:SOT-23_Handsoldering | Q1, Q2, Q3, Q4, Q5 |
| 1 | 100k | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R6 |
| 1 | 100n | Capacitors_ThroughHole:C_Disc_D3_P2.5 | C2 |
| 1 | 3V | nametag:CR2032 | BT1 |
| 1 | ATTINY13-SS | Housings_DIP:DIP-8_W7.62mm | U1 |
| 1 | ISP | Pin_Headers:Pin_Header_Straight_2x03 | P1 |
| 1 | RESET | Buttons_Switches_ThroughHole:SW_PUSH_SMALL | JP1 |
Questions
How big is the Nametag PCB?
It measures 180 × 54 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Nametag use?
116 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Nametag KiCad files?
From the onitake/pcb-workshop repository on GitHub, at the commit this page was made from: the board is nametag.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Nametag design in my own project?
Its repository states no licence, so its author keeps all rights: ask onitake before reusing the design.
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