HardLabs

Attenuator

krzys9876·htpc_rig·Kicad_boards/Pre/Atten/attenuator/attenuator.kicad_pcb

Attenuator PCB layout, top view — open source board by krzys9876

About the Attenuator PCB

Attenuator is an open source PCB design by krzys9876, published on GitHub under the MIT license. It is a 2-layer board measuring 150.4 × 53.5 mm, with 66 components from 12 distinct parts.

Other key parts include the ULN2803A. By type, the board carries 42 resistors, 8 relays, 8 diodes, 5 connectors, 2 capacitors and 1 IC.

It belongs with the power & battery designs in this gallery.

From the project

HTPC, Volumio player, power amp, power supply etc.

This is a dump of various files related to the devices that I use in my home entertainment setup.

A miniITX PC enclosed in custom case (see: modushop.pl). The PC is fanless, so I had to choose a relative low power processor and a good radiator. However, since I have a overhead projector with a loud fan it doesn't matter at all.

A Raspberry Pi based Volumio player (see: volumio.com) enclosed in custom case. There are two Pis: one is a controller for two displays, the other is the actual player.

Main components on the Attenuator

ULN2803A

Attenuator bill of materials (BOM)

66 components, 12 distinct parts.

QtyPartRefs
1
ULN2803A
U1
1
AUDIO_IN
J1
1
POWER
J2
1
LED
J3
1
INPUT
J4
1
AUDIO_OUT
J5
8
FRT5_separated
K1, K2, K3, K4, K5, K6, K7, K8
8
LED
D1, D2, D3, D4, D5, D6, D7, D8
1
C
C1
1
CP
C2
34
R
R1, R2, R3, R4, R5, R6, R7, R8 +26
8
R
R25, R26, R27, R28, R29, R30, R31, R32

Attenuator design files

The KiCad project lives in the krzys9876/htpc_rig repository on GitHub; these links point at the commit this page was built from.

Attenuator: common questions

How big is the Attenuator PCB?

The Attenuator measures 150.4 × 53.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Attenuator?

66 components, from 12 distinct parts. The full bill of materials is listed on this page.

Where can I download the Attenuator design files?

From the krzys9876/htpc_rig repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Attenuator design in my own project?

Yes, under the terms of its MIT license, which krzys9876 chose for the repository.

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