2 layers75 × 60 mm
2 layers175 × 86 mm
PreAmpBoard
terjeio/MultimediaCenter2Multimedia center with DAB/FM radio
- Size
- 175 × 86 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 177
- Nets
- 152
- Pads
- 641
- Tracks, vias
- 1,675, 119
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 18 Sep 2017
- Updated
- 20 Sep 2017
Overview
PreAmpBoard is an open-source printed circuit board by terjeio, from the terjeio/MultimediaCenter repository on GitHub. It is a 2-layer board of 175 × 86 mm with 177 parts on 152 nets, routed with 1,675 tracks and 119 vias.
It is built around the LM358, 78L05 and LM7815CT, with the LM7915CT, MIC5209BM and MIC5268-1.2BM5 among its other parts. Its parts include 70 capacitors, 51 resistors, 26 ICs, 20 connectors and 5 diodes. It belongs with the MSP430 boards of this library.
Main components
7
LM358
SOP-8-18V~18V 0℃~+70℃ 1.2MHz 10nA 2 24mA 3V~36V 500uA 50nA 5mV 80dB Built-in compensation SOP-8 Operational Amplifier ROHSMSKSEMIOperational Amplifier
78L05
SOT-89-3-20℃~+120℃@(Tj) 1 1.7V 100mA 2mA 30V 40uV 49dB@(120Hz) 5V Fixed Over Temperature Protection、Short Circuit Protection Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSUMWVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
LM7815CT
TO-220-30℃~+125℃@(Ta) 1 1.5A 15V 35V 54dB@(120Hz) 90uV Fixed Positive Short Circuit Protection、Thermal shutdown TO-220-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSHGSEMIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
LM7915CT
TO-220-30℃~+125℃ 1 1.5A 15V 35V 7.8mA Fixed Negative Short Circuit Protection、Thermal shutdown TO-220-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSHGSEMIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
MIC5209BM
SOIC-8SOIC-8 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
MIC5268-1.2BM5
SOT-23-5-40℃~+125℃@(Tj) 1 1.2V 150mA 1uA 6V Fixed Over Current Protection、Thermal Shutdown、Operating status indication Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) RegulatorsMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BAV99
SOT-231 Pair Series Connection 1.25V@150mA 100V 215mA 250mW 4A 4ns 500nA@80V SOT-23 Switching Diodes ROHSNexperiaSwitching Diodes
README
README.mdMultimedia center with DAB/FM radio
Features:
High quality (IMO) pre-amp board with I2C control of inputs and VCA based volume control.
5 line inputs, one may be fitted with an internal RIAA-preamp (phono, for moving magnet cartridges). 2 line outputs with old-style tape copy function and post listening possible.
Power amplifier on/off switching via inbuilt relay river.
KeyStone DAB/FM-module may be fitted.
Custom Raspberry PI power switch with PC-style startup/shutdown, may be controlled over I2C or from a front panel button. Has "breakout" socket for internal USB HDD.
IR Remote Control - RC5 protocol: for input selection, volume control and UI controller navigation.
Main controller built around a Texas Instruments Tiva C MPU, custom UI library with support for KeyStone radio-module.
Raspberry PI for media playback (via Kodi), in my configuration audio is fed via HDMI to a TV and then to a DAC mounted inside the pre-amp cabinet.
Parts
177| Qty | Value | Footprint | References |
|---|---|---|---|
| 26 | 100nF | Engineering_Conn:C_Disc_D3_P5 | C25, C26, C27, C28, C29, C30, C31, C32, C33, C34, C35, C36, C37, C38, C39, C40 +10 |
| 10 | 47K | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R5, R6, R7, R8, R13, R14, R15, R16, R17, R18 |
| 9 | OP275 | Sockets_DIP:DIP-8__300 | U3, U4, U5, U6, U7, U8, U9, U10, U17 |
| 7 | 100nF | Capacitors_SMD:C_1206 | C1, C2, C3, C17, C66, C68, C69 |
| 6 | 10uF/16V | Capacitors_ThroughHole:C_Radial_D5_L11_P2.5 | C20, C21, C52, C55, C57, C60 |
| 4 | 18K | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R19, R20, R23, R24 |
| 4 | 5K6 | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R27, R28, R34, R35 |
| 4 | 680R | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R9, R10, R11, R12 |
| 4 | 6K8 | Resistors_SMD:R_0805 | R44, R45, R47, R48 |
| 3 | 100R | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R25, R26, R49 |
| 3 | 12pF | Capacitors_SMD:C_0805 | C10, C11, C12 |
| 3 | 22uF | Capacitors_Tantalum_SMD:TantalC_SizeA_EIA-3216_Reflow | C13, C14, C15 |
| 3 | 4.7nF | Capacitors_SMD:C_0805 | C4, C5, C6 |
| 3 | 68pF | Capacitors_SMD:C_0805 | C7, C8, C9 |
| 3 | DG411 | Housings_SOIC:SOIC-16_3.9x9.9mm_Pitch1.27mm | U12, U13, U15 |
| 2 | 1000uF/50V | Capacitors_ThroughHole:C_Radial_D16_L25_P7.5 | C49, C50 |
| 2 | 10K | Resistors_SMD:R_0805 | R2, R4 |
| 2 | 10uF/16V | Capacitors_SMD:c_elec_3x5.3 | C18, C19 |
| 2 | 12nF | Engineering_Conn:C_Disc_D3_P5 | C53, C58 |
| 2 | 150K | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R21, R22 |
| 2 | 1K | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R32, R39 |
| 2 | 1N4007 | Diodes_ThroughHole:Diode_DO-41_SOD81_Horizontal_RM10 | D1, D2 |
| 2 | 2.7nF | Engineering_Conn:C_Disc_D3_P5 | C54, C59 |
| 2 | 24K | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R29, R36 |
| 2 | 270K | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R30, R37 |
| 2 | 27K | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R31, R38 |
| 2 | 470uF/50V | Capacitors_ThroughHole:C_Radial_D10_L20_P5 | C45, C46 |
| 2 | 47pF | Engineering_Conn:C_Disc_D3_P5 | C22, C23 |
| 2 | 50pF | Engineering_Conn:C_Disc_D3_P5 | C24, C70 |
| 2 | 56K | Resistors_ThroughHole:Resistor_Horizontal_RM10mm | R33, R40 |
| 2 | BC850 | Housings_SOT-23_SOT-143_TSOT-6:SOT-23 | Q1, Q2 |
| 2 | Cx | Engineering_Conn:C_Disc_D3_P5 | C51, C56 |
| 2 | DG413 | Housings_SOIC:SOIC-16_3.9x9.9mm_Pitch1.27mm | U14, U16 |
| 2 | SSM-2018T | Housings_SOIC:SOIC-16_7.5x10.3mm_Pitch1.27mm | U1, U2 |
| 1 | 1.5nF | Capacitors_SMD:C_0805 | C16 |
| 1 | 100K | Resistors_SMD:R_0805 | R1 |
| 1 | 15K | Resistors_SMD:R_0805 | R50 |
| 1 | 1K | Resistors_SMD:R_0805 | R3 |
| 1 | 1N14147 | Diodes_SMD:SOD-123 | D4 |
| 1 | 1nF | Capacitors_SMD:C_0805 | C65 |
| 1 | 1uF | Capacitors_SMD:C_1206 | C67 |
| 1 | 2x12VAC | Engineering_Conn:CONN_PWR_3P | P9 |
| 1 | 3K3 | Resistors_SMD:R_0805 | R41 |
| 1 | 47K | Resistors_SMD:R_0805 | R46 |
| 1 | 56K | Resistors_SMD:R_0805 | R51 |
| 1 | 56nH | Resistors_SMD:R_0805 | L1 |
| 1 | 68K | Resistors_SMD:R_0805 | R43 |
| 1 | 78L05 | Housings_TO-92:TO-92_Inline_Narrow_Oval | U20 |
| 1 | 8K2 | Resistors_SMD:R_0805 | R42 |
| 1 | ANT | RF_connectors:CON-SMA-EDGE | P10 |
| 1 | AUX | Engineering_Conn:PSG01550 | P1 |
| 1 | AUX IN | Engineering_Conn:70543-03 | P12 |
| 1 | AUX/PHONO | Pin_Headers:Pin_Header_Straight_2x03 | P7 |
| 1 | BAV99 | Housings_SOT-23_SOT-143_TSOT-6:SOT-23 | D5 |
| 1 | BY164 | Engineering_Conn:BRIDGE_RECTIFIER_5MM | D3 |
| 1 | CD | Engineering_Conn:PSG01550 | P2 |
| 1 | CHASSIS | Pin_Headers:Pin_Header_Straight_1x01 | P11 |
| 1 | DAB UART | Engineering_Conn:70543-03 | P17 |
| 1 | DAC | Engineering_Conn:70543-03 | P13 |
| 1 | I2C | Engineering_Conn:70543-03 | P16 |
| 1 | LINE OUT | Engineering_Conn:PSG01550 | P6 |
| 1 | LINE OUT | Engineering_Conn:70543-03 | P8 |
| 1 | LM358 | Engineering_Conn:SO-8 | U24 |
| 1 | LM7815CT | Engineering_Conn:TO-220-10x15VFIN | U19 |
| 1 | LM7915CT | Engineering_Conn:TO-220-10x15VFIN | U18 |
| 1 | MCP4725 | Engineering_Conn:SOT23-6 | U25 |
| 1 | MCU PWR | Pin_Headers:Pin_Header_Straight_1x03 | P15 |
| 1 | MIC5209 | Engineering_Conn:SOT223 | U21 |
| 1 | MIC5268-1.2 | Housings_SOT-23_SOT-143_TSOT-6:SOT-23-5 | U23 |
| 1 | MSP430G2553-20 | Engineering_Conn:TSSOP20 | U11 |
| 1 | PWRON | Engineering_Conn:PSG01538 | J1 |
| 1 | PWRON | Pin_Headers:Pin_Header_Straight_1x02 | P19 |
| 1 | RADIO | Engineering_Conn:70543-03 | P14 |
| 1 | SBW | Pin_Headers:Pin_Header_Straight_1x03 | P18 |
| 1 | T2_L4A_8650C | IoSpecial:T2-L4A-8650C | IC1 |
| 1 | TAPE1 | Engineering_Conn:PSG01551 | P4 |
| 1 | TAPE2 | Engineering_Conn:PSG01551 | P5 |
| 1 | TC1185-1.8 | Housings_SOT-23_SOT-143_TSOT-6:SOT-23-5 | U22 |
| 1 | TUNER | Engineering_Conn:PSG01550 | P3 |
The 175 most common of 177 parts.
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Questions
How big is the PreAmpBoard PCB?
It measures 175 × 86 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PreAmpBoard use?
177 parts, built around the LM358, 78L05, LM7815CT and LM7915CT. 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 PreAmpBoard KiCad files?
From the terjeio/MultimediaCenter repository on GitHub, at the commit this page was made from: the board is Electronics/PreAmpBoard/PreAmpBoard.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the PreAmpBoard design in my own project?
Its repository states no licence, so its author keeps all rights: ask terjeio before reusing the design.