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Project Notes

#284 TheGent

The Gent is Boldport Club Project #10 - a simple circuit on a beautiful board



Unboxing and Parts

Ref Item Count
S1 DPDT slide switch, C&K JS202011SCQN x1
D1 5mm phototransistor, Kingbright PT333-3C x1
L1,3,5 Green 5mm LED, Kingbright L-9294CGCK x3
L2,4 Orange 5mm LED, Kingbright L-9294SECK x2
  CR2032 battery clip, Multicomp BC-2001 x1
Q1 N-channel MOSFET, Fairchild 2N7000 x1
R1-8 390Ω through-hole resistor, Multicomp MCF 0.25W 10K x8
R9 820Ω through-hole resistor, Multicomp MF25 820R x1
R10 10KΩ through-hole resistor, Multicomp MF25 390R x1


The five clear LEDs are actually two colours: a perfect time to whip out the LIGEMDIO project for some LED testing:


Phototransistor Connections

Note that the PT333-3C Phototransistor uses a familiar 5mm LED packaging, but the collector/emitter pins are the reverse of what you might intuit. The short leg and flat edge are actually the collector and is connected to the positive supply side.


Completed Build






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.