2 layers

Dimmer

Boston University Summer Challenge

Copper layers: 2
Thickness: 1.6 mm
Parts: 11
Nets: 10
Pads: 29
Tracks, vias: 0, 0
Routed: Not yet
KiCad: KiCad 10.0 (file 20260206)
Created: 26 May 2026
Updated: 29 Oct 2026

Overview

Dimmer is an open-source printed circuit board by umeding, from the umeding/BUSC repository on GitHub, published under the Unlicense licence. It is a 2-layer board with 11 parts on 10 nets.

It is built around the NE555P. Its parts include 4 diodes, 3 resistors, 2 capacitors and 1 IC.

Main components

NE555P
DIP-80℃~+70℃ 100kHz 10mA 4.5V~16V DIP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / Counters

README

README.md

BUSC

Boston University Summer Challenge

Parts

Qty	Value	Footprint	References
2	100n	Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm	C1, C2
2	1N4148	Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal	D1, D2
2	200	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R1, R3
2	LED	LED_THT:LED_D5.0mm_Clear	D3, D4
1	10k	Potentiometer_THT:Potentiometer_ACP_CA9-V10_Vertical	RV1
1	1k	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R2
1	NE555P	Package_DIP:DIP-8_W7.62mm	U1

Questions

What parts does the Dimmer use?

11 parts, built around the NE555P. 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 Dimmer KiCad files?

From the umeding/BUSC repository on GitHub, at the commit this page was made from: the board is dimmer/dimmer.kicad_pcb and its schematic dimmer/dimmer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Dimmer design in my own project?

Its repository publishes it under the Unlicense licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/umeding-busc-dimmer" title="Dimmer in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/umeding-busc-dimmer.jpg" alt="Dimmer" width="1200" height="900">

A picture that opens the board, for a README

[![Dimmer](https://pcbkit.io/embed/boards/umeding-busc-dimmer.jpg?size=s)](https://pcbkit.io/boards/umeding-busc-dimmer)

Source

Repository: umeding/BUSC
Board file: dimmer/dimmer.kicad_pcb
Commit: 4cd3cd5
Licence: Unlicense

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