2 layers52.5 × 36.6 mm
ESP8266-WebRadio
karawin/Ka-Radio
A wifi webradio with only low cost boards ESP8266 and VS1053 by Jp Cocatrix
52 parts453
4 layers90 × 75 mm
Audio Preamp
AlecRossCS/Audio-PreampThis is an analog audio preamplifier, designed on first principles as well as help from Small Signal Audio Design by Douglas Self
- Size
- 90 × 75 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 130
- Nets
- 73
- Pads
- 327
- Tracks, vias
- 620, 139
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 5 Oct 2021
- Updated
- 7 Oct 2021
Overview
Audio Preamp is an open-source printed circuit board by AlecRossCS, from the AlecRossCS/Audio-Preamp repository on GitHub. It is a 4-layer board of 90 × 75 mm with 130 parts on 73 nets, routed with 620 tracks and 139 vias.
It is built around the NE5532. Its parts include 56 capacitors, 54 resistors, 9 ICs, 3 connectors and 2 transistors. It belongs with the audio and music boards of this library.
Main components
1README
hardware_design_files/readme.mdHardware Design File Section
all schematics created using Kicad
Parts
130| Qty | Value | Footprint | References |
|---|---|---|---|
| 20 | 470n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C16, C17, C18, C37, C38, C39, C40, C41, C42, C49, C50, C51 +4 |
| 10 | 4.7k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6, R7, R16, R17, R37, R40, R41, R44, R53, R54 |
| 8 | 100u | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C21, C22, C24, C25, C26, C27, C28, C30 |
| 8 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3, R13, R14, R27, R28, R33, R34 |
| 7 | NE5532 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1, U2, U5, U6, U7, U8, U9 |
| 6 | 100p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10, C15, C33, C34, C35, C36 |
| 6 | 10u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C5, C6, C13, C14, C31, C32 |
| 6 | 22k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R12, R38, R42, R51, R52 |
| 4 | 10 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R29, R30, R35, R36 |
| 4 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R15, R47, R48 |
| 4 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C23, C29, C43, C46 |
| 4 | 3.3k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R25, R26, R31, R32 |
| 2 | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP1, JP2 | |
| 2 | 1.32k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R21, R22 |
| 2 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R10 |
| 2 | 100u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C55, C56 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R45, R46 |
| 2 | 10k | Potentiometer_THT:Potentiometer_Alps_RK163_Dual_Horizontal | RV2, RV3 |
| 2 | 120 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R20, R23 |
| 2 | 1M | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R19, R24 |
| 2 | 2.2n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C12, C20 |
| 2 | 220k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R11 |
| 2 | 22p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C45, C48 |
| 2 | 4.4n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C11, C19 |
| 2 | 4.7n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C44, C47 |
| 2 | 47p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C53, C54 |
| 2 | 68 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R49, R50 |
| 2 | 82k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R18 |
| 2 | 9.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R39, R43 |
| 2 | AudioJack3 | Connector_Audio:Jack_3.5mm_CUI_SJ-3523-SMT_Horizontal | J2, J3 |
| 1 | 5k | Potentiometer_THT:Potentiometer_Alps_RK163_Dual_Horizontal | RV1 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_Wuerth_6941xx301002 | J1 |
| 1 | D_Bridge_+-AA | Diode_SMD:Diode_Bridge_Vishay_DFS | D1 |
| 1 | LM317_TO-220 | Package_TO_SOT_THT:TO-220-3_Vertical | U3 |
| 1 | LM337_TO220 | Package_TO_SOT_THT:TO-220-3_Vertical | U4 |
| 1 | Q_NPN_CBE | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | Q_PNP_CBE | Package_TO_SOT_SMD:SOT-23 | Q2 |
Questions
How big is the Audio Preamp PCB?
It measures 90 × 75 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Audio Preamp use?
130 parts, built around the NE5532. 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 Preamp KiCad files?
From the AlecRossCS/Audio-Preamp repository on GitHub, at the commit this page was made from: the board is hardware_design_files/Audio_Preamp.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Audio Preamp design in my own project?
Its repository states no licence, so its author keeps all rights: ask AlecRossCS before reusing the design.
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