2 layers210 × 104 mm
AmplifierBoard
dangrie158/AmpStation
A Class D audio amplifier in a n old Teufel Decoder Station 5 case
243 partsMIT
2 layers62 × 78.7 mm
Circuit board created for turning power on and off to a Bluetooth audio board
- Size
- 62 × 78.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 26
- Nets
- 35
- Pads
- 110
- Tracks, vias
- 178, 31
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 25 Jun 2021
- Updated
- 25 Jun 2021
Overview
OnOffBT is an open-source printed circuit board by ckronber, from the ckronber/BluetoothOnOFFCircuitBoard repository on GitHub. It is a 2-layer board of 62 × 78.7 mm with 26 parts on 35 nets, routed with 178 tracks and 31 vias.
It is built around the ATMEGA328PB-AU, L7805 and L7812. Its parts include 8 capacitors, 6 resistors, 6 connectors, 3 ICs and 2 transistors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA328PB-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 27 2KB 32KB 8 Bit AVR Built-in FLASH Power-on reset (POR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Watchdog reset、External pin reset (NRST)、Built-in general-purpose timer、Programmable watchdog、Touch function TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
L7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
L7812
TO-220ST0℃~+125℃@(Tj) 1 1.2A 12V 2V@(1A) 30V 71dB@(120Hz) 76uV Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdBluetoothOnOFFCircuitBoard
Circuit board created for turning power on and off to a Bluetooth audio board
Parts
26| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 20k | Resistors_SMD:R_1206_HandSoldering | R1, R2, R3, R4, R5, R6 |
| 4 | .1uF | Capacitors_SMD:C_1210_HandSoldering | C4, C5, C7, C8 |
| 4 | Conn_01x01 | Mounting_Holes:MountingHole_3.2mm_M3_Pad | J2, J3, J4, J5 |
| 2 | .22uF | Capacitors_SMD:C_1210_HandSoldering | C3, C6 |
| 2 | 22pF | Capacitors_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C2 |
| 1 | ATMEGA328PB-AU | Housings_QFP:TQFP-32_7x7mm_Pitch0.8mm | U1 |
| 1 | Crystal | Crystals:Crystal_HC49-4H_Vertical | 16Mhz1 |
| 1 | ISCP PINS | Pin_Headers:Pin_Header_Straight_2x03_Pitch2.00mm | P1 |
| 1 | L7805 | TO_SOT_Packages_SMD:TO-263-2 | U2 |
| 1 | L7812 | TO_SOT_Packages_SMD:TO-263-2 | U3 |
| 1 | Molex 2x4 | Connectors_Molex:Molex_MegaFit_2x04x5.70mm_Angled | J1 |
| 1 | Q_NMOS_GDS | TO_SOT_Packages_SMD:TO-252-2 | Q1 |
| 1 | Q_PMOS_GDS | TO_SOT_Packages_SMD:TO-252-2 | Q2 |
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Questions
How big is the OnOffBT PCB?
It measures 62 × 78.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the OnOffBT use?
26 parts, built around the ATMEGA328PB-AU, L7805 and L7812. 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 OnOffBT KiCad files?
From the ckronber/BluetoothOnOFFCircuitBoard repository on GitHub, at the commit this page was made from: the board is onOffBT.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the OnOffBT design in my own project?
Its repository states no licence, so its author keeps all rights: ask ckronber before reusing the design.