25kHz-Band-Pass-Filter

rgandhi7·25kHz-Band-Pass-Filter

This repository ships a schematic but no board layout.

About the 25kHz-Band-Pass-Filter PCB

25kHz-Band-Pass-Filter is an open source PCB design by rgandhi7, published on GitHub. It is a board, with 19 components from 9 distinct parts.

Other key parts include the ${SIM.PARAMS} and MCP6S21-I_SN. By type, the board carries 8 resistors, 6 capacitors, 4 ICs and 1 connector.

It belongs with the power & battery designs in this gallery.

From the project

Analog signal conditioning and active 25 kHz bandpass filter PCB with MCP6S21 PGA for underwater acoustic localization.

Custom analog signal conditioning PCB designed for the Illini RoboSub autonomous underwater vehicle (AUV) acoustic navigation system. The circuit amplifies microvolt-level hydrophone transducer signals and isolates 25 kHz acoustic localization pings while suppressing thruster switching noise and multipath reflections.

- Programmable Pre-Amplification Stage: Features a Microchip MCP6S21-I/SN Single-Ended Programmable Gain Amplifier (PGA) controlled via a 3-wire SPI interface (ChipSEL, ClockIN, DataIN). This allows downstream firmware to dynamically scale analog gain based on hydrophone ping…

Main components on the 25kHz-Band-Pass-Filter

${SIM.PARAMS}MCP6S21-I_SN

25kHz-Band-Pass-Filter bill of materials (BOM)

19 components, 9 distinct parts.

Qty	Part	Footprint	Refs
3	${SIM.PARAMS}	SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm	U1, U2, U3
1	MCP6S21-I_SN	SOIC127P600X175-8N	U4
1	Conn_01x02	BNC_Amphenol_031-5539_Vertical	J1
2	6.6nF	CP_Axial_L10.0mm_D4.5mm_P15.00mm_Horizontal	C1, C2
2	6.1nF	CP_Axial_L10.0mm_D4.5mm_P15.00mm_Horizontal	C3, C4
2	0.1µF	CP_Axial_L10.0mm_D4.5mm_P15.00mm_Horizontal	C5, C6
4	10kΩ	R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical	R1, R2, R5, R6
2	100kΩ	R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical	R3, R7
2	1MΩ	R_Axial_DIN0204_L3.6mm_D1.6mm_P1.90mm_Vertical	R4, R8

25kHz-Band-Pass-Filter design files

The KiCad project lives in the rgandhi7/25kHz-Band-Pass-Filter repository on GitHub; these links point at the commit this page was built from.

Schematic25kHz-Band-Pass-Filter.kicad_sch

25kHz-Band-Pass-Filter: common questions

How many components are on the 25kHz-Band-Pass-Filter?

19 components, from 9 distinct parts. The full bill of materials is listed on this page.

Where can I download the 25kHz-Band-Pass-Filter design files?

From the rgandhi7/25kHz-Band-Pass-Filter repository on GitHub, which has the schematic; the links under Design files point to each one.

Can I use the 25kHz-Band-Pass-Filter design in my own project?

The repository has no license, so all rights stay with rgandhi7. Use it as a reference, and ask the author before reusing the design.

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