Active-Low-Pass-Filter

Hawk453·Active-Low-Pass-Filter-PCB

Active-Low-Pass-Filter PCB layout, top view — open source board by Hawk453

About the Active-Low-Pass-Filter PCB

Active-Low-Pass-Filter is an open source PCB design by Hawk453, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 80 × 45 mm, with 10 components from 5 distinct parts.

Other key parts include the LM741. By type, the board carries 4 resistors, 3 connectors, 2 capacitors and 1 IC.

It belongs with the audio designs in this gallery.

From the project

PCB design of Active LPF using KiCAD

This project implements a second-order active low-pass filter using the LM741 operational amplifier. The filter is designed in KiCad and is suitable for basic signal conditioning and noise filtering applications.

The filter attenuates frequencies above a specified cutoff frequency (fc) while allowing lower-frequency signals to pass with minimal attenuation.

The filter circuit is built using a Sallen-Key topology and includes:

Active-Low-Pass-Filter, from the project README — From the project README

Main components on the Active-Low-Pass-Filter

Active-Low-Pass-Filter bill of materials (BOM)

10 components, 5 distinct parts.

Qty	Part	Footprint	Refs
1	LM741	DIP-8_W7.62mm_LongPads	U1
2	Conn_Coaxial	BNC_TEConnectivity_1478035_Horizontal	J1, J2
1	Conn_01x02_Pin	Banana_Jack_2Pin	J3
2	C	C_Disc_D5.0mm_W2.5mm_P5.00mm	C1, C2
4	R	R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal	R1, R2, R3, R4

Active-Low-Pass-Filter design files

The KiCad project lives in the Hawk453/Active-Low-Pass-Filter-PCB repository on GitHub; these links point at the commit this page was built from.

LayoutSecond_Order_Low_Pass_Filter_Ac.kicad_pcb
SchematicSecond_Order_Low_Pass_Filter_Ac.kicad_sch

Active-Low-Pass-Filter: common questions

How big is the Active-Low-Pass-Filter PCB?

The Active-Low-Pass-Filter measures 80 × 45 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Active-Low-Pass-Filter?

10 components, from 5 distinct parts. The full bill of materials is listed on this page.

Where can I download the Active-Low-Pass-Filter design files?

From the Hawk453/Active-Low-Pass-Filter-PCB repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Active-Low-Pass-Filter design in my own project?

Yes, under the terms of its GPL-3.0 license, which Hawk453 chose for the repository.

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