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6ch af preamplifier

dilshan·6ch-af-preamplifier·design/6ch-preamp.kicad_pcb

6ch af preamplifier PCB layout, top view — open source PIC board by dilshan
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About the 6ch af preamplifier PCB

6ch af preamplifier is an open source PIC PCB design by dilshan, published on GitHub under the MIT license. It is a 2-layer board measuring 151.3 × 50.8 mm, with 115 components from 31 distinct parts.

Its main chip is the PIC16F886-IP, from the PIC family. Other key parts include the uA7805, LM317T, LM337T, PT2258 and TL074. By type, the board carries 44 resistors, 40 capacitors, 17 connectors, 9 ICs, 3 transistors and 1 diode.

It belongs with the audio and displays & leds designs in this gallery.

From the project

5.1 channel audio preamplifier

This project introduces a digitally controlled 5.1 channel audio preamplifier system. This amplifier is specifically designed to increase the gain of the multi-channel PC sound cards.

This preamplifier consists of six TL074/TL072 preamplifier stages and PT2258 electronic volume control. The input stage of this preamplifier consists of six TL074/TL072 buffer stages. The PIC16F886 microcontroller manages the PT2258 electronic volume control IC. All the volume levels and menu options are displayed on HD44780, 16×2 character LCD screen.

6ch af preamplifier, from the project README
From the project README

Main components on the 6ch af preamplifier

uA7805LM317TLM337TPIC16F886-IPPT2258TL074TL072

6ch af preamplifier bill of materials (BOM)

115 components, 31 distinct parts.

QtyPartRefs
1
uA7805
U1
1
LM317T
U2
1
LM337T
U3
1
PIC16F886-IP
U4
1
PT2258
U5
2
TL074
U6, U8
2
TL072
U7, U9
1
BC817
Q1
2
BSS138
Q2, Q3
1
3.5mm Terminal
J1
1
16-pin 2.54mm Male Header
J2
1
2-pin Micro JST
J3
1
5-pin Micro JST
J4
1
5-pin 2.54mm Male Header
J5
12
3.5mm Terminal
J6, J7, J8, J9, J10, J11, J12, J13 +4
1
50K
RV1
1
W04
D1
5
0.1MFD
C1, C10, C11, C12, C13
2
4700MFD
C2, C3
2
0.1MFD
C4, C5
Show 11 more
QtyPartRefs
6
10MFD
C6, C7, C8, C9, C21, C22
25
1MFD
C14, C15, C16, C17, C18, C19, C20, C23 +17
3
0R
R1, R2, R3
2
390R
R4, R7
2
1K
R5, R6
7
22K
R8, R33, R34, R35, R36, R43, R44
1
470R
R9
11
10K
R10, R11, R12, R13, R14, R29, R30, R31 +3
6
1M
R15, R16, R17, R18, R19, R20
6
100K
R21, R22, R23, R24, R37, R38
6
2.2K
R25, R26, R27, R28, R39, R40

6ch af preamplifier design files

The KiCad project lives in the dilshan/6ch-af-preamplifier repository on GitHub; these links point at the commit this page was built from.

6ch af preamplifier: common questions

What microcontroller does the 6ch af preamplifier use?

The 6ch af preamplifier is built around the PIC16F886-IP, from the PIC family.

How big is the 6ch af preamplifier PCB?

The 6ch af preamplifier measures 151.3 × 50.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 6ch af preamplifier?

115 components, from 31 distinct parts. The full bill of materials is listed on this page.

Where can I download the 6ch af preamplifier design files?

From the dilshan/6ch-af-preamplifier repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the 6ch af preamplifier design in my own project?

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

Can I test firmware for the 6ch af preamplifier without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug PIC firmware against it before you order a PCB.

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