Breadboard Maketka: a modular board system for fast builds

30 May 2026 · 3 min read · 610 words

Breadboard Maketka is a set of modular boards, bridge parts, and trays on a single mounting grid that can be combined like a construction kit.

Once I was building a simple project on a cheap breadboard and realized there was no space left. I bought another board, but at home it turned out to be incompatible: the mounting holes did not line up, so I could not assemble everything into one neat structure.

That surprised me. Breadboards are mass-produced, yet there is still no convenient mechanical standard for combining them. This is how the idea of building my own system appeared.

This is still a draft concept, but the foundation is already clear: every module follows the same sizing logic and the same mounting grid. Because of that, parts can be designed independently and still fit together later without manual adjustment.

System at a glance

Mounting grid: 15 mm pitch, 7.5 mm offset
Module sizes: multiples of 15 mm
Bridges and trays: use the same grid
Logic: every part is designed around shared mechanics

Breadboard Maketka modular system overview

Project resources

CAD sources mock download STL files download models Project repository GitHub Telegram post read post

Core module geometry

The system starts with a small set of standard modules:

**S module****60 × 45 mm**

modules.STL

**M module**outer size **90 × 45 mm** / **M bus** — **90 × 15 mm**

modulem.STL side wallm_k.STL

**L module**outer size **180 × 45 mm** / **L bus** — **180 × 15 mm**

modulel.STL side walll_k.STL

Module parameters

Module height: 17.1 mm
Mounting grid: 15 mm pitch, 7.5 mm offset
Magnet hole: Ø6.1 mm, depth 2.1 mm — magnet 6 × 2 mm
Insert hole: Ø4 mm, depth 5.6 mm — brass M3 × 4.2 × 5 mm

The mounting holes are two-step: the upper step holds the magnet, the lower one holds the threaded insert.

Bridge parts geometry

They use the same 15 mm grid with a 7.5 mm offset, so they work as universal lower connectors.

Bridge parameters

Grid: 15 mm
Through holes: Ø3.4 mm
Screw recess: Ø6 mm, depth 3.3 mm — DIN 912 head
Magnet recess: Ø6.1 mm, depth 2.1 mm — magnet 6 × 2 mm

I · width 15 mm

30 mmbr_15_30.STL 45 mmbr_15_45.STL 60 mmbr_15_60.STL 90 mmbr_15_90.STL 180 mmbr_15_180.STL

I · width 30 mm

basebr_30.STL 30 mmbr_30_30.STL 45 mmbr_30_45.STL 60 mmbr_30_60.STL 90 mmbr_30_90.STL 180 mmbr_30_180.STL

I · width 60 mm

45 mmbr_60_45.STL 60 mmbr_60_60.STL

I · width 90 mm

45 mmbr_90_45.STL 60 mmbr_90_60.STL

I · width 180 mm

60 mmbr_180_60.STL 90 mmbr_180_90.STL 180 mmbr_180_180.STL

Shaped

L · 45 mmbr_L_45.STL L · 60 mmbr_L_60.STL T · junctionbr_t_90_45.STL X · crossbr_x_90_90.STL

STL files

All models live in the repository: 3D_Models/STL. Click a tile and the file downloads directly.

Expanders

In the future there should be expanders and additional modules that make it faster to assemble ideas: for example, an antenna holder or a screen with a pre-assembled board and pins. By combining different modules you can build a layout without starting from scratch.

So far I have only made one type of expander — that is how the whole story started. It holds a breadboard module at an angle.

Angle brackets

smalldop_ugl_s.STL mediumdop_ugl_m.STL small doubledop_ugl_ss.STL

Project page where I collect all modules: t-kaper.github.io/maketka.

Result and Build Process

You can watch it on YouTube:

Video link: YouTube