Source: https://mokxi.com/learn/path/circuit-design-capstone Updated: 2026-11-11 All paths # Circuit design capstone Expert: take one product from a written requirement to a tested board: blocks, a schematic worked out on paper, part choice, simulating the corners, PCB layout, a test plan, and a revision that fixes what the tests found. Free 7 lessons 4 h 3 chapters 3,140 XP Electrical ยท Expert +400 XP 0 of 7 done Start the course free From a requirement to a plan Lesson plan for teachers What you will build ## 3 projects, built step by step 7 lessons in 3 chapters, about 4 hours on a simulated breadboard. Free, in your browser, every step checked by the simulator. Chapter 1 project ### Choosing the parts Read each part against the job: the ULN2003A's ratings and its 1 V Darlington drop, an LDR's numbers that move the trip point, and the lamp a supply can really carry. Open it in the simulator Chapter 2 project ### Lay out the board Check the nets before the copper, then take the night light into the PCB view: seven footprints, seven nets, placement, routing and the design rule check, with no export needed. Open it in the simulator Chapter 3 project ### Final build: revision B Close the loop on the test report: find why the light would chatter at dusk, stiffen the pull-up, add hysteresis, prove it with the tests, and sign off revision B. Open it in the simulator The map ## Chapter by chapter Each lesson opens when the one before it is done, and each chapter ends in a project. Chapter 1 ## Design it From a sentence to blocks, a schematic and real parts. Open 270 XP ### From a requirement to a plan Every product starts as a sentence. Turn one into numbers you can test: a 12 V lamp that comes on when a room drops below about 20 lux, with no microcontroller. 0 of 5 steps Start What is in it Locked 300 XP ### From blocks to a schematic Work out each block with the numbers on paper: the divider, the threshold and the trip point, then why the LM393 needs its pull-up, all checked on the running circuit. 0 of 5 steps Project Locked 540 XP ### Choosing the parts Read each part against the job: the ULN2003A's ratings and its 1 V Darlington drop, an LDR's numbers that move the trip point, and the lamp a supply can really carry. 0 of 5 steps Chapter 2 ## Prove it Simulate the corners and lay out the board. Locked 300 XP ### Simulate the corners A design that works at the typical numbers is half done. Push the supplies to their limits, see why a ratio-based design shrugs off a sagging 5 V, and what a low 12 V costs the lamp. 0 of 5 steps Project Locked 640 XP ### Lay out the board Check the nets before the copper, then take the night light into the PCB view: seven footprints, seven nets, placement, routing and the design rule check, with no export needed. 0 of 6 steps Chapter 3 ## Ship it Run the test plan, then fix what it found. Locked 350 XP ### Run the test plan The acceptance tests from lesson 1, run one by one with a pass or fail written next to each: bright, dark, the trip point both sides, and the supply corner. 0 of 6 steps Project Locked 740 XP ### Final build: revision B Close the loop on the test report: find why the light would chatter at dusk, stiffen the pull-up, add hysteresis, prove it with the tests, and sign off revision B. 0 of 7 steps Syllabus ## Every lesson in the course All 7 lessons, in order, each with what it covers. Any of them opens in the editor right away. Chapter 1 ### Design it - From a requirement to a plan Every product starts as a sentence. Turn one into numbers you can test: a 12 V lamp that comes on when a room drops below about 20 lux, with no microcontroller. - From blocks to a schematic Work out each block with the numbers on paper: the divider, the threshold and the trip point, then why the LM393 needs its pull-up, all checked on the running circuit. - Choosing the parts Read each part against the job: the ULN2003A's ratings and its 1 V Darlington drop, an LDR's numbers that move the trip point, and the lamp a supply can really carry. Chapter 2 ### Prove it - Simulate the corners A design that works at the typical numbers is half done. Push the supplies to their limits, see why a ratio-based design shrugs off a sagging 5 V, and what a low 12 V costs the lamp. - Lay out the board Check the nets before the copper, then take the night light into the PCB view: seven footprints, seven nets, placement, routing and the design rule check, with no export needed. Chapter 3 ### Ship it - Run the test plan The acceptance tests from lesson 1, run one by one with a pass or fail written next to each: bright, dark, the trip point both sides, and the supply corner. - Final build: revision B Close the loop on the test report: find why the light would chatter at dusk, stiffen the pull-up, add hysteresis, prove it with the tests, and sign off revision B. Keep going ## The rest of your track Circuit design capstone is part of the electrical track, a ladder of courses from zero to expert. Track ### Electrical track Current and voltage you can see, then transistors, op-amps, filters, power and PCBs. Every circuit runs in a real circuit simulator in your browser. See every course on the track Kits ## Build it on your bench too Every lesson runs in the simulator with nothing to buy. When you want the real thing, these kits have the parts. Have a kit already? ### Find your kit Pick the starter kit you own and run every lesson in its manual with the same parts on the same pins. See every kit Questions ## About Circuit design capstone Is Circuit design capstone free? Yes. All 7 lessons of Circuit design capstone are free and run in your browser, with nothing to install and no parts to buy before you start. Do I need any parts? No. Every circuit is built on a simulated breadboard, and the simulator checks each step as you go. When you want to build it for real, the same parts and wiring work on a real bench. How long does Circuit design capstone take? About 4 hours: 7 lessons in 3 chapters, each one a few short steps. Your progress is kept, so you can stop after any lesson and pick up where you left off. What will I build? Each chapter ends in a project that puts it together: Choosing the parts, Lay out the board and Final build: revision B. Where do I start? With "From a requirement to a plan", and each lesson builds on the one before it. New to circuits? Electronics basics is the course that starts from zero.