2 layers113.3 × 75.4 mm
2 layers113.3 × 75.4 mm
Squares revB
TheRealMolen/pcbitsmisc circuit bucket
- Size
- 113.3 × 75.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 124
- Nets
- 113
- Pads
- 411
- Tracks, vias
- 1,199, 678
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 17 May 2026
- Updated
- 30 Jun 2026
Overview
Squares revB is an open-source printed circuit board by TheRealMolen, from the TheRealMolen/pcbits repository on GitHub. It is a 2-layer board of 113.3 × 75.4 mm with 124 parts on 113 nets, routed with 1,199 tracks and 678 vias.
It is built around the ATTINY2313-20PU, MCP6022-I/P and MCP6024-I/P, with the 74HC00D and DMMT5551 among its other parts. Its parts include 66 resistors, 26 capacitors, 10 connectors, 7 ICs and 4 transistors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
5
ATTINY2313-20PU
DIP-20-40℃~+85℃ 128Byte 128Byte 18 2.7V~5.5V 20MHz 2KB 8 Bit AVR Built-in FLASH DIP-20 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
MCP6022-I/P
PDIP-8-40℃~+125℃ 10MHz 1mA 1pA 1pA 2 2.5V~5.5V 3.5uV/℃ 30mA 500uV 7V/us 8.7nV/√Hz@10kHz 90dB Built-in compensation Rail-to-Rail Input, Rail-to-Rail Output PDIP-8 Operational Amplifier ROHSMicrochip TechnologyOperational Amplifier
MCP6024-I/P
PDIP-14-40℃~+85℃ 10MHz 1mA 1pA 1pA 2.5V~5.5V 3.5uV/℃ 30mA 4 500uV 7V/us 8.7nV/√Hz@10kHz 90dB Built-in compensation Rail-to-Rail Input, Rail-to-Rail Output PDIP-14 Operational Amplifier ROHSMicrochip TechnologyOperational Amplifier
74HC00D
SOP-14-40℃~+125℃ 1.5V、3.15V、4.2V 1.9V、3.7V、5.9V 100mV、400mV、400mV 2 2V~6V 4 40uA 5.2mA 5.2mA 500mV~1.8V 74HC Series 7ns@6V,50pF NAND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates
DMMT5551
SOT-26-55℃~+150℃ 150mV 160V 2 NPN 200mA 300MHz 300mW 50nA 6V 80 NPN SOT-26 Bipolar (BJT) ROHSDiodes IncorporatedBipolar (BJT)
Parts
124| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R13, R14, R15, R16, R17, R18, R19, R21, R23, R25, R26, R27, R30, R32, R36, R37 +16 |
| 11 | 22k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11, R22, R24, R28, R29, R33, R38, R39, R41, R42, R43 |
| 9 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C11, C12, C13, C14, C17, C18, C23, C24 |
| 8 | 100K Log | Potentiometer_THT:Potentiometer_Alpha_RD901F-40-00D_Single_Vertical | VR1, VR2, VR3, VR4, VR5, VR6, VR7, VR8 |
| 4 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R53, R54, R57, R58 |
| 4 | 33n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C21, C22, C25, C26 |
| 4 | 470R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R55, R56, R62, R64 |
| 4 | 4k7 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9, R12, R34, R50 |
| 3 | 15k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R7, R10 |
| 3 | 470n | Capacitor_THT:C_Rect_L7.0mm_W3.5mm_P5.00mm | C1, C2, C19 |
| 3 | 74HC00 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U2, U4, U5 |
| 2 | 10u | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C5, C8 |
| 2 | 1N4148 | Diode_SMD:D_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D1, D2 |
| 2 | 1u | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C6, C7 |
| 2 | 220R | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R4 |
| 2 | 22n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C15, C20 |
| 2 | 2k2 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R35, R52 |
| 2 | 3904 | Package_TO_SOT_SMD:SOT-23 | Q2, Q3 |
| 2 | 470n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9, C16 |
| 1 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 22p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10 |
| 1 | 2k7 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R31 |
| 1 | 3906 | Package_TO_SOT_SMD:SOT-23 | Q4 |
| 1 | 3k9 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 40106 | Package_DIP:DIP-14_W7.62mm | U3 |
| 1 | 47u | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C3 |
| 1 | 56k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R20 |
| 1 | ATtiny2313-20P | Package_DIP:DIP-20_W7.62mm_Socket | U7 |
| 1 | DMMT5551 | DMMT5551:SOIC6_DMMT551_DIO | Q1 |
| 1 | Filter | Connector_PinSocket_2.54mm:PinSocket_2x02_P2.54mm_Vertical | J6 |
| 1 | ISP | Connector_PinSocket_2.54mm:PinSocket_2x03_P2.54mm_Vertical | J9 |
| 1 | Inputs | Connector_PinSocket_2.54mm:PinSocket_2x08_P2.54mm_Vertical | J3 |
| 1 | Line IN | AudioJacks:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J1 |
| 1 | Line OUT | AudioJacks:Jack_3.5mm_QingPu_WQP-PJ398SM_Vertical | J8 |
| 1 | MCP6022 | Package_DIP:DIP-8_W7.62mm | U1 |
| 1 | MCP6024 | Package_DIP:DIP-14_W7.62mm | U6 |
| 1 | MIX | Connector_PinSocket_2.54mm:PinSocket_2x03_P2.54mm_Vertical | J5 |
| 1 | MUX | Connector_PinSocket_2.54mm:PinSocket_2x03_P2.54mm_Vertical | J7 |
| 1 | POWER | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D3 |
| 1 | Sig Out | Connector_PinSocket_2.54mm:PinSocket_2x06_P2.54mm_Vertical | J10 |
| 1 | USB_C_Pwr | molen:USB-C_Module_RUNCCI-YUN | J2 |
| 1 | VCA | Connector_PinSocket_2.54mm:PinSocket_2x03_P2.54mm_Vertical | J4 |
More from TheRealMolen/pcbits
2- 2 layers11.2 × 11.2 mm
Similar boards
- 4 layers
- 2 layers30 × 45 mm
- 2 layers30 × 62 mm
Boost
cuteboy0323/1590A
These are not at all useful, but having done guitar pedal board kit builds, I decided I should try to make something from scratch.
23 partsGPL-2.0 - 4 layers140.3 × 101.7 mm
Sheet1
horychen/ProjectEureka
12 phase motor drive including inverter, microcontroller-mother-board, sensing, communication, DAC, etc.
338 parts17GPL-3.0 - 4 layers60.2 × 95.1 mm
Cerebra 1.4 IPS
spamatica/Cerebra_328_IPS_PCB
A multi preset effect pedal based on FV1
109 parts3GPL-3.0 - 8 layers100 × 100 mm
- 2 layers100 × 44.8 mm
Signal generator board
wheeler-microfluidics/kicad___signal_generator_board
Signal generator board for the DropBot DMF system.
56 parts1 - 2 layers50 × 73.5 mm
Questions
How big is the Squares revB PCB?
It measures 113.3 × 75.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Squares revB use?
124 parts, built around the ATTINY2313-20PU, MCP6022-I/P, MCP6024-I/P and 74HC00D. 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 Squares revB KiCad files?
From the TheRealMolen/pcbits repository on GitHub, at the commit this page was made from: the board is squares/squares-revB/squares-revB.kicad_pcb and its schematic filters/sallen-key-5v/sallen-key-5v.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Squares revB design in my own project?
Its repository states no licence, so its author keeps all rights: ask TheRealMolen before reusing the design.