2 layers50 × 40 mm Alien screamer, the printed circuit board in 3D

Alien screamer

This repository stores code for various electronics projects I've made

Size: 50 × 40 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 55
Nets: 35
Pads: 136
Tracks, vias: 208, 7
Pours: 2
Routed: Yes
KiCad: KiCad 7 (file 20221018)
Created: 26 Jun 2019
Updated: 19 Nov 2025

Overview

Alien screamer is an open-source printed circuit board by adeboni, from the adeboni/electronics repository on GitHub. It is a 2-layer board of 50 × 40 mm with 55 parts on 35 nets, routed with 208 tracks and 7 vias.

It is built around the LM324, LM386 and MMBF5457, with the MMBT3904 and 1N4148WS among its other parts. Its parts include 24 resistors, 14 capacitors, 10 connectors, 3 transistors and 2 ICs.

Main components

README

README.md

This repository stores code for various electronics projects I've made

Wasp Cannon: A wifi-enabled water cannon for shooting water at wasps on my balcony
CV Glove: A glove with flex sensors on fingers that output control voltages for eurorack modules
Critter Coat: A coat with fluttering butterflies on it
AQI Monitor: Simple air quality monitor using a Honeywell HPM sensors
Atari Controller: Custom Atari 2600 controller with an analog joystick
Camera Remote: Wireless camera shutter control
Gas Sensor: A generic MQ gas sensor board with LED indicators
PS2 Drone Controller: Lets you control quadcopters with a Bluetooth PS2 controller
WH24 Rachio Adapter: A 915 MHz radio that can receive and parse packets from an Ambient Weather Station and control the rain sensor input on a Rachio irrigation controller
Scrubotron: A tape head amplifier for use with tape head wands
Mega Trackball: Adapter PCBs for a bowling-ball sized trackball mouse
Reverb Pedal: Custom reverb guitar pedal based on a PT2399
Looper Pedal: Custom looper guitar pedal based on an ISD1000 series voice recorder

Parts

Qty	Value	Footprint	References
6	100k	Resistor_SMD:R_0603_1608Metric	R4, R5, R6, R10, R19, R22
4	10k	Resistor_SMD:R_0603_1608Metric	R14, R15, R17, R21
4	4.7k	Resistor_SMD:R_0603_1608Metric	R1, R2, R7, R23
3	100n	Capacitor_SMD:C_0603_1608Metric	C2, C3, C10
3	1u	Capacitor_SMD:C_0603_1608Metric	C4, C6, C9
3	220u	Capacitor_SMD:CP_Elec_6.3x7.7	C1, C13, C14
2	2M	Resistor_SMD:R_0603_1608Metric	R12, R20
2	75k	Resistor_SMD:R_0603_1608Metric	R8, R9
2	MMBT3904	Package_TO_SOT_SMD:SOT-23	Q1, Q2
1	10	Resistor_SMD:R_0603_1608Metric	R24
1	100p	Capacitor_SMD:C_0603_1608Metric	C5
1	10n	Capacitor_SMD:C_0603_1608Metric	C8
1	10u	Capacitor_SMD:C_0603_1608Metric	C11
1	15k	Resistor_SMD:R_0603_1608Metric	R18
1	1N4148WS	Diode_SMD:D_SOD-323	D1
1	1n	Capacitor_SMD:C_0603_1608Metric	C7
1	220k	Resistor_SMD:R_0603_1608Metric	R13
1	2k	Resistor_SMD:R_0603_1608Metric	R11
1	300k	Resistor_SMD:R_0603_1608Metric	R16
1	3k	Resistor_SMD:R_0603_1608Metric	R3
1	47n	Capacitor_SMD:C_0603_1608Metric	C12
1	Battery	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J1
1	JACK	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J11
1	LFO DEPTH	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J9
1	LFO LED	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J4
1	LFO RATE	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J3
1	LFO SHAPE 1	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J7
1	LFO SHAPE 2	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J8
1	LM324	Package_SO:SOIC-14_3.9x8.7mm_P1.27mm	U1
1	LM386	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U2
1	MMBF5457	Package_TO_SOT_SMD:SOT-23	Q3
1	SYNC	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J5
1	Speaker	Buzzer_Beeper:Buzzer_D30mm_H12.8mm_P15mm	LS1
1	VCO FREQ	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J10
1	VOLUME	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J6

Questions

How big is the Alien screamer PCB?

It measures 50 × 40 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Alien screamer use?

55 parts, built around the LM324, LM386, MMBF5457 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 Alien screamer KiCad files?

From the adeboni/electronics repository on GitHub, at the commit this page was made from: the board is alien_screamer/alien_screamer.kicad_pcb and its schematic alien_screamer/alien_screamer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Alien screamer design in my own project?

Its repository states no licence, so its author keeps all rights: ask adeboni before reusing the design.

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/adeboni-electronics-alien-screamer" title="Alien screamer in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/adeboni-electronics-alien-screamer.jpg" alt="Alien screamer" width="1200" height="900">

A picture that opens the board, for a README

[![Alien screamer](https://pcbkit.io/embed/boards/adeboni-electronics-alien-screamer.jpg?size=s)](https://pcbkit.io/boards/adeboni-electronics-alien-screamer)

Source

Repository: adeboni/electronics
Board file: alien_screamer/alien_screamer.kicad_pcb
Commit: fd219f3
Licence: Not stated

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