2 layers45.7 × 31.8 mm
LEDx16 board
tardate/LittleArduinoProjects
a collection of "Little Electronic & Arduino Projects", most involving electronics or an Arduino in one way or another!
36 parts803MIT
2 layers55.9 × 81.3 mm
Sketch jan25a
marsairforce/counter_appA simple two digit 7-segment display thing with buttons
- Size
- 55.9 × 81.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 31
- Pads
- 116
- Tracks, vias
- 259, 46
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 9 Jun 2018
- Updated
- 9 Jun 2018
Overview
Sketch jan25a is an open-source printed circuit board by marsairforce, from the marsairforce/counter_app repository on GitHub. It is a 2-layer board of 55.9 × 81.3 mm with 25 parts on 31 nets, routed with 259 tracks and 46 vias.
It is built around the 74HC595 and KS-00Q-01. Its parts include 8 resistors, 3 capacitors, 3 ICs, 3 diodes and 3 switches. It belongs with the lEDs and displays boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
2README
README.mdA simple counter application
This is a device that has 2 7-segment displays, and buttons.
It can be used for simple manual counting of something. I originally built it for a "It has been xx days since.." signs.
But it can also be used for one of those "Now serving xx" signs.
This project was a test of the waters to see what OSHPark is able to create.
It started off as a breadboard experiment, then a hand wire job on a punchboard, and then a finished PCB board.
It was an exercise to learn how to use Kicad as well. Before I had been trying to use gEDA and suite to make a circuit board layout, but never got past the schematic phase. Perhaps because there is no existing parts or footprint library for gEDA and also no documentation for how to use the tools (that are not even GUI based) to try to create a symbol and a footprint. I was able to get farther with Kicad in an evening than I was able to get over several years of coming back to poking at gEDA.
It was also the first product built using Attiny-85 device. Learning how to use shift registers, multiplex switch button inputs, software interrupts.
All the components were things I had in stock, thru-hole parts.
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | R | Resistors_THT:Resistor_Vertical_RM5mm | R1, R2, R3, R4, R5, R6, R7 |
| 3 | 1N914 | Diodes_THT:Diode_DO-35_SOD27_Horizontal_RM10 | D1, D2, D3 |
| 3 | C | Capacitors_THT:C_Disc_D7.5_P5 | C1, C2, C3 |
| 3 | KS-00Q-01 | Local_Displays:e_switch | S1, S2, S3 |
| 2 | 2N3906 | TO_SOT_Packages_THT:TO-92_Inline_Narrow_Oval | Q1, Q2 |
| 2 | 74HC595 | Housings_DIP:DIP-16_W7.62mm | U1, U2 |
| 2 | MAN8610 | Local_Displays:MAN8610 | AFF1, AFF2 |
| 1 | 10K | Resistors_THT:Resistor_Vertical_RM5mm | R8 |
| 1 | ATTINY85-P | Housings_DIP:DIP-8_W7.62mm | IC1 |
| 1 | CONN_01X02 | Connectors_Phoenix:PhoenixContact_MCV-G_02x5.08mm_Vertical | P1 |
Questions
How big is the Sketch jan25a PCB?
It measures 55.9 × 81.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sketch jan25a use?
25 parts, built around the 74HC595 and KS-00Q-01. 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 Sketch jan25a KiCad files?
From the marsairforce/counter_app repository on GitHub, at the commit this page was made from: the board is sketch_jan25a.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sketch jan25a design in my own project?
Its repository states no licence, so its author keeps all rights: ask marsairforce before reusing the design.
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