2 layers56 × 65 mm
SeaTalk1
dotnet/iot
This repo includes .NET Core implementations for various IoT boards, chips, displays and PCBs.
24 parts2.4kMIT
2 layers93.2 × 85 mm
Logikz
aroyx/Logikzlogic gates using npn transistors
- Size
- 93.2 × 85 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 24
- Nets
- 19
- Pads
- 73
- Tracks, vias
- 215, 6
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 12 Jun 2025
- Updated
- 6 Jul 2025
Overview
Logikz is an open-source printed circuit board by aroyx, from the aroyx/Logikz repository on GitHub. It is a 2-layer board of 93.2 × 85 mm with 24 parts on 19 nets, routed with 215 tracks and 6 vias.
Its parts include 9 switches, 7 resistors, 6 transistors and 1 diode.
README
README.mdLogikz
I designed a simple circuit board that can function as three different logic
gates:- AND, OR, and NOR
Making of Logikz
This is my third PCB and this time around I wanted to know how transistors
work, and also wanted to know how logic gates work. I myself implemented the
AND and OR gates but had to look up how to do a NOR gate. Later I also
changed how my OR gate works looking at the implementation of NOR gate.
The first iteration would've never worked, because of absolutely no current
calculations done. Used circuit.js to fix my implementation.
Earlier it had like 5 buttons, two for A and B inputs and the rset for
choosing between the gates. But had to ditch that idea because current it
didn't work in the simulation. Now I have 9 buttons, A and B for each
gates, so total 3 A and 3 B input buttons.
Reason why the first iteration didn't work: It had something to do with "current takes the least resistive path", it is hard to explain in text.
The simulation file is present in ~/logikz_circuitjs.txt, you can click this link to see my project in action.
PCB
|
Front Of the PCB |
Back Of the PCB |
Back of the PCB without Silkscreen |
|
Front Of the PCB (3D) |
Back Of the PCB (3D) |
Simulation in CircuitJS |
SChematic
BOM
~/BOM.csv has BOM of this project.
| QTY | Name |
|---|---|
| 1 | Battery Holder |
| 1 | LED |
| 6 | NPN Transistor |
| 2 | 220 Ohm Resistor |
| 5 | 4.7k Ohm Resistor |
| 9 | Push Button |
Made by @Ankush Roy in Slack from Hack Club
Made as a part of https://solder.hackclub.com/!
Parts
24| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | SW_Push | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 |
| 7 | R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R3, R4, R5, R6, R7, R8 |
| 6 | NPN | Package_TO_SOT_THT:TO-92L_HandSolder | Q1, Q2, Q3, Q4, Q5, Q6 |
| 1 | Battery_Cell | Battery:BatteryHolder_Keystone_3034_1x20mm | BT1 |
| 1 | LED | LED_THT:LED_D5.0mm | D1 |
Questions
How big is the Logikz PCB?
It measures 93.2 × 85 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Logikz use?
24 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 Logikz KiCad files?
From the aroyx/Logikz repository on GitHub, at the commit this page was made from: the board is kicad/Logikz.kicad_pcb and its schematic kicad/Logikz.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Logikz design in my own project?
Its repository states no licence, so its author keeps all rights: ask aroyx before reusing the design.
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