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Project Notes

#392 whiteboard

Building the Whiteboard - Boldport Club project #22 - a breadboard enhancer featuring power supply and prototyping areas.


Here’s a quick demo running a CD4060 ripple counter on the breadboard..



The whiteboard is a neat little “breadboard enhancer”. It includes:

  • a prototyping shroud for a mini breadboard, including 4 LEDs and various pads for other components and connections
  • a variable power supply unit, based on the LM317
  • a CR2032 coin cell power supply unit
  • a 6-pin DIP adapter for 3 x 0805/1206 SMD components (e.g. LEDs, diodes or passives) or 2 x SOT23 SMD components (e.g. transistors/FETs)

Kit Components

The project includes the following components

Qty Component
1x 170-point breadboard, Pro-Signal PSG-BB-170W
1x Adjustable regulator, TI LM317KCS
1x 2032 battery holder, Multicomp BC-2001
1x 6-way socket, TruConnect DS1023-1*6 S01
1x 5-way header, Multicomp MC34739
1x 2.1mm power socket, TruConnect, 20-0970
1x 2KΩ trimmer, TE Connectivity 416XA202P
1x Resettable 100mA fuse, Multicomp MC33169
2x 10µF electrolytic capacitors, Multicomp MCMR35V106M4X7
1x 100nF ceramic capacitor , Suntan TS15001E104MSBFBOR
3x 1A diode, Diodes 1N4001-T
4x 3mm white LEDs, Valcon VDIFFLED-3MM-W
1x 220Ω resistor, Multicomp MCF 0.25W 220R


Also included is a sheet of StickerCAD icons. I used them on my laptop case - including a rebus if you look carefully;-)



I’ve yet to decide what component(s) I’ll put on the DIP adapter. But power supply boards are complete and working perfectly.


As a quick demonstration and test, I put a simple 4-stage CD4060 ripple counter running at a base frequency of around 10 Hz. on the breadboard, with outputs driving the LEDs on the shroud (essentially a 4-digit binary counter).




Credits and References

Project Source on GitHub Project Gallery Return to the LEAP Catalog

This page is a web-friendly rendering of my project notes shared in the LEAP GitHub repository.

LEAP is just my personal collection of projects. Two main themes have emerged in recent years, sometimes combined:

  • electronics - usually involving an Arduino or other microprocessor in one way or another. Some are full-blown projects, while many are trivial breadboard experiments, intended to learn and explore something interesting
  • scale modelling - I caught the bug after deciding to build a Harrier during covid to demonstrate an electronic jet engine simulation. Let the fun begin..
To be honest, I haven't quite figured out if these two interests belong in the same GitHub repo or not. But for now - they are all here!

Projects are often inspired by things found wild on the net, or ideas from the many great electronics and scale modelling podcasts and YouTube channels. Feel free to borrow liberally, and if you spot any issues do let me know (or send a PR!). See the individual projects for credits where due.