Source: https://mokxi.com/learn/path/technician-capstone Updated: 2026-11-11 All paths # Technician capstone: your own repair bench Faulty units come in, and you send them back working: intake, a diagnosis plan, schematic reading, repair, verification, a repair log and a customer report, with the meter, the scope and the component tester. Free 7 lessons 7 h 3 chapters 3,640 XP Electrical ยท Expert +400 XP 0 of 7 done Start the course free Intake: log the unit, test the parts Lesson plan for teachers What you will build ## 3 projects, built step by step 7 lessons in 3 chapters, about 7 hours on a simulated breadboard. Free, in your browser, every step checked by the simulator. Chapter 1 project ### Schematic reading: predict every node A reference divider reads high. Trace the meter onto the schematic, predict the healthy reading from the parts, find the drifted resistor, learn why one reading can point at two suspects, and close the chapter with a predict-the-reading quiz. Open it in the simulator Chapter 2 project ### Verification: prove it under load A transformer power supply hums and sags. Find the dried-out smoothing capacitor with the meter and scope, replace it, then prove the repair: DC output, ripple on the AC range, a heavier load, and a predict-the-reading quiz to close the chapter. Open it in the simulator Chapter 3 project ### Customer report: no fault found, and why A bench supply "reads 10 V when set to 12". Measure it, find it is doing exactly what it was told, protect the customer's load, then write the report a customer can understand and finish your portfolio write-up. 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 ## Intake and diagnosis Log the unit, test the parts, write a plan and read the schematic before you touch anything. Open 320 XP ### Intake: log the unit, test the parts Your bench opens for business. Take in a bag of loose parts the way a shop does: write the ticket, then let the component tester name each part, its legs and its numbers, and catch a wrong substitute before it goes in. 0 of 6 steps Start What is in it Locked 350 XP ### Diagnosis plan: reproduce, then halve the problem A 5 V supply comes in with a dim light and a gadget that keeps resetting. Reproduce the complaint, write a plan that splits the circuit in half, measure in that order, and confirm the cause by substitution. 0 of 6 steps Project Locked 700 XP ### Schematic reading: predict every node A reference divider reads high. Trace the meter onto the schematic, predict the healthy reading from the parts, find the drifted resistor, learn why one reading can point at two suspects, and close the chapter with a predict-the-reading quiz. 0 of 6 steps Chapter 2 ## Repair and verify Let the readings pick the part, change one thing, and prove the repair under load. Locked 380 XP ### Repair: one change, one reason Two 555 timer units come in running at the wrong rate. Use the meter's frequency and duty ranges and the scope to work out from the readings alone whether the capacitor or a resistor is wrong, then fix each with one change. 0 of 6 steps Project Locked 800 XP ### Verification: prove it under load A transformer power supply hums and sags. Find the dried-out smoothing capacitor with the meter and scope, replace it, then prove the repair: DC output, ripple on the AC range, a heavier load, and a predict-the-reading quiz to close the chapter. 0 of 7 steps Chapter 3 ## Hand it back As-found and as-left logs, a customer report in plain words, and your bench portfolio. Locked 350 XP ### Documentation: as found, as left An LED light bar comes in dim. Record every as-found reading before you touch it, fix the one wrong resistor, record the same readings as left, and write a repair log another tech could follow. 0 of 6 steps Project Locked 740 XP ### Customer report: no fault found, and why A bench supply "reads 10 V when set to 12". Measure it, find it is doing exactly what it was told, protect the customer's load, then write the report a customer can understand and finish your portfolio write-up. 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 ### Intake and diagnosis - Intake: log the unit, test the parts Your bench opens for business. Take in a bag of loose parts the way a shop does: write the ticket, then let the component tester name each part, its legs and its numbers, and catch a wrong substitute before it goes in. - Diagnosis plan: reproduce, then halve the problem A 5 V supply comes in with a dim light and a gadget that keeps resetting. Reproduce the complaint, write a plan that splits the circuit in half, measure in that order, and confirm the cause by substitution. - Schematic reading: predict every node A reference divider reads high. Trace the meter onto the schematic, predict the healthy reading from the parts, find the drifted resistor, learn why one reading can point at two suspects, and close the chapter with a predict-the-reading quiz. Chapter 2 ### Repair and verify - Repair: one change, one reason Two 555 timer units come in running at the wrong rate. Use the meter's frequency and duty ranges and the scope to work out from the readings alone whether the capacitor or a resistor is wrong, then fix each with one change. - Verification: prove it under load A transformer power supply hums and sags. Find the dried-out smoothing capacitor with the meter and scope, replace it, then prove the repair: DC output, ripple on the AC range, a heavier load, and a predict-the-reading quiz to close the chapter. Chapter 3 ### Hand it back - Documentation: as found, as left An LED light bar comes in dim. Record every as-found reading before you touch it, fix the one wrong resistor, record the same readings as left, and write a repair log another tech could follow. - Customer report: no fault found, and why A bench supply "reads 10 V when set to 12". Measure it, find it is doing exactly what it was told, protect the customer's load, then write the report a customer can understand and finish your portfolio write-up. 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 Technician capstone: your own repair bench Is Technician capstone: your own repair bench free? Yes. All 7 lessons of Technician capstone: your own repair bench 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 Technician capstone: your own repair bench take? About 7 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: Schematic reading: predict every node, Verification: prove it under load and Customer report: no fault found, and why. Where do I start? With "Intake: log the unit, test the parts", and each lesson builds on the one before it. New to circuits? Electronics basics is the course that starts from zero.