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2 layers109.2 × 57.1 mmSRAM Programming, the printed circuit board in 3D

A place to hold all projects I have made while reading the book Learning The Art of Electronics

Size
109.2 × 57.1 mm
Copper layers
2
Thickness
1.6 mm
Parts
20
Nets
104
Pads
176
Tracks, vias
344, 42
Pours
1
Routed
Yes
KiCad
KiCad 8.0 (file 20240108)
Created
18 Dec 2024
Updated
14 Mar 2025

Overview

SRAM Programming is an open-source printed circuit board by PhysicsUofRAUI, from the PhysicsUofRAUI/laoe_projects repository on GitHub, published under the MIT licence. It is a 2-layer board of 109.2 × 57.1 mm with 20 parts on 104 nets, routed with 344 tracks and 42 vias.

Its parts include 8 resistors, 8 diodes, 1 capacitor, 1 IC and 1 switch. It belongs with the AVR (ATmega, ATtiny) boards of this library.

README

power_supply_project/readme.md

Intro

This project is part of my learning for the learning the Art of Electronics. It is a simple power supply that I made based on what I've learned.

Regulator calculations

Output Voltage

Vref = 1.25V

R2 = 2k

R4 = 2.2k

R5 = 0 - 10k

Next part is going to ignore the Iref error term that comes out of the reference terminal for simplicity.

Vout ~ Vref[1 + (R4+R5)/R2]

The minimum Vout would then be: Vout = 1.25V + 1.25V(2.2k/2k) = 2.6V

The maximum Vout would then be: Vout = 1.25V + 1.25V(12.2k/2k) = 8.9V

Parts

20
QtyValueFootprintReferences
8LEDLED_THT:LED_D5.0mmD1, D2, D3, D4, D5, D6, D7, D8
8RResistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_HorizontalR1, R2, R3, R4, R5, R6, R7, R8
10.01uCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC1
1Arduino_Mega2560_R3_Shieldarduino-library:Arduino_Mega2560_R3_ShieldA1
1IS62C256ALPackage_SO:SOP-28_8.4x18.16mm_P1.27mmU1
1SW_DIP_x08Button_Switch_THT:SW_DIP_SPSTx08_Slide_6.7x21.88mm_W7.62mm_P2.54mm_LowProfileSW1

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Questions

How big is the SRAM Programming PCB?

It measures 109.2 × 57.1 mm and has 2 copper layers, 1.6 mm thick.

What parts does the SRAM Programming use?

20 parts. 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 SRAM Programming KiCad files?

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

Can I use the SRAM Programming 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).