4 layers208.9 × 71.8 mm
Battery powered bench power supply
Roshan-khatri78/Electronics-Projects-KiCad-
A collection of my KiCad projects and PCB designs. These projects reflect my learning journey in electronics and PCB design.
147 parts2
2 layers54.4 × 39.8 mm
Bat preamp
BIST-Research/batbot-hardwareschematics and pcbs for the batbot
- Size
- 54.4 × 39.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 38
- Nets
- 27
- Pads
- 113
- Tracks, vias
- 156, 10
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 6 Sep 2023
- Updated
- 6 Sep 2023
Overview
Bat preamp is an open-source printed circuit board by BIST-Research, from the BIST-Research/batbot-hardware repository on GitHub, published under the MIT licence. It is a 2-layer board of 54.4 × 39.8 mm with 38 parts on 27 nets, routed with 156 tracks and 10 vias.
It is built around the LM324AD, LM321 and MMBT3904. Its parts include 16 resistors, 10 capacitors, 7 connectors, 2 ICs and 2 diodes. It belongs with the audio and music boards of this library.
Main components
3
LM324AD
SOIC-14-16V~-1.5V、1.5V~16V -25℃~+85℃ 1.2MHz 2nA 300nA 35nV/√Hz@1kHz 3V~32V 4 500V/ms 60mA 7mV 800uA 80dB EMI filtering/RF suppression SOIC-14 Operational Amplifier ROHSTexas InstrumentsOperational Amplifier
LM321
SOT-23-50℃~+70℃ 1 2mV 3nA 400V/ms 40mA 430uA 45nA 90dB SOT-23-5 Operational Amplifier ROHSPJSEMIOperational Amplifier
MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
README
README.mdbatbot-hardware
schematics and pcbs for the batbot
batbot-6.5 wiring diagram
Adafruit itsybitsy M4 pinout
Grandcentral M4 pinout
Parts
38| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 1Meg | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R11, R12, R15, R16 |
| 2 | 0u1 | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A_Pad1.58x1.35mm_HandSolder | C2, C3 |
| 2 | 100n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C7, C8 |
| 2 | 10n | Capacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C9, C10 |
| 2 | 22k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R13, R14 |
| 2 | 2k7 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R9, R10 |
| 2 | 500R | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R2 |
| 1 | 0u1 | Capacitor_Tantalum_SMD:CP_EIA-6032-28_Kemet-C_Pad2.25x2.35mm_HandSolder | C6 |
| 1 | 100k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R8 |
| 1 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R4 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R7 |
| 1 | 10u | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B_Pad1.50x2.35mm_HandSolder | C1 |
| 1 | 12k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3 |
| 1 | 22u | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A_Pad1.58x1.35mm_HandSolder | C5 |
| 1 | 27k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R6 |
| 1 | 39k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5 |
| 1 | 3u3 | Capacitor_Tantalum_SMD:CP_EIA-3216-18_Kemet-A_Pad1.58x1.35mm_HandSolder | C4 |
| 1 | 430450800 | 430450800:MOLEX_430450800 | J1 |
| 1 | Job_Status_ind | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2 |
| 1 | LM321 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | LM324A | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | PWR_ind | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1 |
| 1 | amp_conn_out | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J7 |
| 1 | echo_conn_in | Connector_JST:JST_XH_B7B-XH-A_1x07_P2.50mm_Vertical | J4 |
| 1 | force_conn_in | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | J3 |
| 1 | force_conn_out | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J8 |
| 1 | mic_l_conn | Connector_JST:JST_XH_B5B-XH-A_1x05_P2.50mm_Vertical | J5 |
| 1 | mic_r_conn | Connector_JST:JST_XH_B5B-XH-A_1x05_P2.50mm_Vertical | J2 |
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Questions
How big is the Bat preamp PCB?
It measures 54.4 × 39.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Bat preamp use?
38 parts, built around the LM324AD, LM321 and MMBT3904. 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 Bat preamp KiCad files?
From the BIST-Research/batbot-hardware repository on GitHub, at the commit this page was made from: the board is batbot6.5-preamp/bat_preamp.kicad_pcb and its schematic batbot6.5-mainboard/bboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Bat preamp design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).