2 layers50 × 40.5 mm DTMF, the printed circuit board in 3D

DTMF

Size: 50 × 40.5 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 34
Nets: 25
Pads: 84
Tracks, vias: 187, 0
Pours: 2
Routed: Yes
KiCad: KiCad 4
Created: 14 Sep 2016
Updated: 14 Sep 2016

Overview

DTMF is an open-source printed circuit board by ExploreEmbedded, from the ExploreEmbedded/DTMF-Decoder repository on GitHub. It is a 2-layer board of 50 × 40.5 mm with 34 parts on 25 nets, routed with 187 tracks and 0 vias.

Its parts include 11 resistors, 9 diodes, 8 connectors, 2 capacitors and 2 ICs.

README

README.md

DTMF-Decoder

Parts

Qty	Value	Footprint	References
4	56K	Discret:R4	R1, R2, R3, R4
4	CONN_01X01	EE:M3_mounting	P5, P6, P7, P8
2	10uF	C1V5	C1, C2
2	470	Discret:R4	R10, R11
2	5.6V	Discret:D3	D1, D2
1	100K	Discret:R4	R8
1	150k	Discret:R4	R9
1	1N14148	Discret:D3	D3
1	3.5795MHz	Crystals:Crystal_HC49-U_Vertical	X1
1	3.5MM_JACK	SparkFun-AUDIO-JACK	U1
1	330K	Discret:R4	R5
1	47K	Discret:R4	R6
1	68K	Discret:R4	R7
1	AUDIO_IN	SIL-2	P2
1	CONN_01X02	Pin_Headers:Pin_Header_Straight_1x02	P4
1	MT8870P	DIP-18__300_ELL	IC1
1	OUTPUT	SIL-5	P3
1	POWER 5V	Connect:bornier2	P1
1	Q1	EE:LED-3MM	D4
1	Q2	EE:LED-3MM	D5
1	Q3	EE:LED-3MM	D6
1	Q4	EE:LED-3MM	D7
1	REF	Logo_new:Logo_8	VAL
1	int	EE:LED-3MM	D8
1	pwr	EE:LED-3MM	D9

Questions

How big is the DTMF PCB?

It measures 50 × 40.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the DTMF use?

34 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 DTMF KiCad files?

From the ExploreEmbedded/DTMF-Decoder repository on GitHub, at the commit this page was made from: the board is Hardware Design/DTMF.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the DTMF design in my own project?

Its repository states no licence, so its author keeps all rights: ask ExploreEmbedded before reusing the design.

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/exploreembedded-dtmf-decoder-dtmf" title="DTMF 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/exploreembedded-dtmf-decoder-dtmf.jpg" alt="DTMF" width="1200" height="900">

A picture that opens the board, for a README

[![DTMF](https://pcbkit.io/embed/boards/exploreembedded-dtmf-decoder-dtmf.jpg?size=s)](https://pcbkit.io/boards/exploreembedded-dtmf-decoder-dtmf)

Source

Repository: ExploreEmbedded/DTMF-Decoder
Board file: Hardware Design/DTMF.kicad_pcb
Commit: ea5687d
Licence: Not stated

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