2 layers32 × 70 mm Audio Power Meter, the printed circuit board in 3D

Audio Power Meter

kicad schematic for a powermeter using the LM3915 IC.

Size: 32 × 70 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 23
Nets: 17
Pads: 59
Tracks, vias: 205, 17
Routed: Yes
KiCad: KiCad 4
Created: 5 Jul 2015
Updated: 5 Jul 2015

Overview

Audio Power Meter is an open-source printed circuit board by jjrh, from the jjrh/LM3915_audio repository on GitHub, published under the MIT licence. It is a 2-layer board of 32 × 70 mm with 23 parts on 17 nets, routed with 205 tracks and 17 vias.

It is built around the LM3915. Its parts include 10 diodes, 6 resistors, 3 connectors, 1 capacitor and 1 IC. It belongs with the sensors and measurement and audio and music boards of this library.

Main components

LM3915
DIP-18DIP-18 LED Drivers ROHSGcoreLED Drivers

Category and platform

Sensors and measurement Audio and music

Project files

Show this board on your page

https://pcbkit.io/boards/jjrh/LM3915_audio

The board's own page, for a message or a post.

Source

Repository: jjrh/LM3915_audio
Board file: Audio_Power_Meter.kicad_pcb
Commit: 36427a1
Licence: MIT

Parts

Qty	Value	Footprint	References
10	LED	LEDs:LED-5MM	D1, D2, D3, D4, D5, D6, D7, D8, D9, D10
2	10k	Resistors_ThroughHole:Resistor_Vertical_RM5mm	R1.1, R2
1	18k	Resistors_ThroughHole:Resistor_Vertical_RM5mm	R1.2
1	2.2	Capacitors_Elko_ThroughHole:Elko_vert_11.2x6.3mm_RM2.5	C1
1	2.7k	Resistors_ThroughHole:Resistor_Vertical_RM5mm	R4
1	30k	Resistors_ThroughHole:Resistor_Vertical_RM5mm	R1.3
1	390	Resistors_ThroughHole:Resistor_Vertical_RM5mm	R3
1	AMP	w_conn_screw:mors_2p	P1
1	CONN_01X01	Connect:1pin	P2
1	LM3915	Housings_DIP:DIP-18_W7.62mm_LongPads	U1
1	power	w_conn_screw:mors_2p	P3

The 21 most common of 23 parts.

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Questions

How big is the Audio Power Meter PCB?

It measures 32 × 70 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Audio Power Meter use?

23 parts, built around the LM3915. 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 Audio Power Meter KiCad files?

From the jjrh/LM3915_audio repository on GitHub, at the commit this page was made from: the board is Audio_Power_Meter.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Audio Power Meter design in my own project?

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