CircuitQuEEst v2.3 — Polish Animations & Blueprint Mode

APK size: ~12 MB (includes bundled Space Grotesk + JetBrains Mono)

Motion polish on top of the v2.2 cockpit redesign, plus a brand-new alternate color scheme.

Blueprint Mode 🔷

A toggleable PCB-blueprint theme — deep navy surfaces with white schematic-style borders, like working on an actual blueprint.

• New ⊞ BP toggle chip in the Home screen header
• Structural colors (backgrounds, surfaces, borders) switch via a CqPalette CompositionLocal — accent colors (blue, gold, green, red) stay constant in both themes
• Survives rotation via rememberSaveable
• All four screens and every component respond instantly to the toggle

Polish Animations ✨

• Shared-element transitions — tapping a topic card morphs it into the lesson hero card and back, using Compose's SharedTransitionLayout API
• Lesson hero parallax — the hero content scrolls at 0.4× speed for subtle depth as you read
• Sticky CTA fade-in — the bottom call-to-action bar fades in only after you scroll past the hero

Repo & Docs

• Polished README — badges, accurate v2.3 feature list, collapsible 42-topic table
• New PR template with project-specific checklist
• Issue chooser now links to the documentation site; blank issues disabled
• Repo About sidebar: description, homepage, and 10 topic tags

Full Changelog: v2.2...v2.3

CircuitQuEEst v2.2 — Claude Design Visual Overhaul

CircuitQuEEst v2.2 — Claude Design Visual Overhaul

Full visual redesign using the Claude Design cockpit aesthetic across all four screens and the GitHub Pages site.

What's new

Theme

• New color palette: CqBg (#0A0E1A), CqBlue (#2480FF), CqGold (#F4B840), CqCyan (#4FD6E8)
• Bundled Space Grotesk + JetBrains Mono fonts — no network required
• Spacing and Radius token objects

Home screen — Schematic icon badges (IEEE-style ImageVectors), shimmer XP bar, animated category expand/collapse, gold border on active quest, shake animation on locked tap

Lesson screen — Gradient hero card with PCB trace overlay, numbered section cards, gold FormulaTile brackets, KeyInsightCallout, sticky gold CTA

Quiz screen — Progress node row (pulsing glow on current), redesigned option cards with correct/wrong highlighting, feedback panel slides up from bottom

Result screen — Animated score ring (0→score% over 800ms, Blue→Gold gradient), stat cards, gold-bracket Up Next card with direct navigation to next lesson

GitHub Pages — Full landing page redesign with phone mockup hero, feature grid, curriculum section

Install

Download CircuitQueest-v2.2.apk below. Enable "Install from unknown sources" on your Android device (8.0+), then open the file.

Previous release: v2.1 (42 topics + collapsible categories + GitHub Pages)

v2.0 - MEMS, Radar, Biomedical & ML Hardware

New Topics (4)

• MEMS - Accelerometers, gyroscopes, pressure sensors, microfabrication
• Radar Systems - Pulse radar, Doppler effect, phased arrays, automotive radar
• Biomedical Electronics - ECG/EEG, pacemakers, patient safety, medical imaging
• Machine Learning Hardware - GPUs, TPUs, quantization, edge AI

Total: 42 topics, 294 quiz questions

📥 Download the APK below and sideload on any Android 8.0+ device.

v1.9 - DSP, Fiber Optics, EVs & Audio

New Topics (4)

• Digital Signal Processing - Sampling theorem, FFT, FIR/IIR filters, quantization
• Fiber Optics & Photonics - Optical fiber, lasers, photodetectors, WDM
• Electric Vehicles - EV powertrains, traction inverters, regen braking, charging
• Audio Electronics - Amplifier classes (A/AB/D), DACs, speakers, headphone amps

Total: 38 topics, 266 quiz questions

📥 Download the APK below and sideload on any Android 8.0+ device.

v1.8 - RF, Analog, Renewable Energy & IoT

New Topics (4)

• RF Circuit Design - S-parameters, LNA, oscillators, mixers, matching networks
• Analog Circuit Design - Current mirrors, diff pairs, feedback amplifiers, bandgap references, cascode
• Renewable Energy - Solar cells, MPPT, wind turbines, grid-tie inverters, energy harvesting
• IoT & Wireless - Wi-Fi/BLE/LoRa/Zigbee, mesh networks, low-power design, IoT security

Total: 34 topics, 238 quiz questions

📥 Download the APK below and sideload on any Android 8.0+ device.

v1.7 - 30 Topics

What's New

Added 4 new topics, bringing the total curriculum to 30 topics:

• Antenna Design — Radiation patterns, gain/directivity, dipole/patch/dish antennas, impedance matching, link budgets
• VLSI Design — CMOS fabrication, design flow (RTL to tape-out), DRC/LVS, timing analysis, power optimization
• Signal Integrity & EMC — Reflections/ringing, crosstalk (3W rule), ground bounce, EMC emissions/immunity, shielding
• Battery & Energy Storage — Li-ion chemistry, capacity/C-rate, CC-CV charging, BMS protection, supercapacitors

Full Topic List

1. Ohm's Law
2. Series & Parallel
3. Kirchhoff's Laws
4. Capacitors & Inductors
5. AC Circuits
6. Op-Amps
7. Thévenin & Norton
8. Diodes & Rectifiers
9. Transistors (BJTs)
10. Digital Logic Gates
11. MOSFETs
12. Filters
13. Transformers
14. Signals & Systems
15. Power Electronics
16. Control Systems
17. Transmission Lines
18. Communication Systems
19. Electromagnetics
20. Semiconductor Physics
21. Digital Systems
22. Electric Machines
23. PCB Design
24. Embedded Systems
25. Power Systems
26. Sensors & Measurement
27. Antenna Design
28. VLSI Design
29. Signal Integrity & EMC
30. Battery & Energy Storage

Download

Install app-debug.apk on any Android 8.0+ device.

v1.6 - 26 Topics

What's New

Added 4 new topics, bringing the total curriculum to 26 topics:

• PCB Design — Layers & stackup, trace width/current, decoupling caps, ground planes, design rules, Gerber files
• Embedded Systems — MCU architecture, GPIO, ADC/DAC, UART/SPI/I2C protocols, interrupts & timers
• Power Systems — Three-phase power, high-voltage transmission, power factor, protection, renewable integration
• Sensors & Measurement — Temperature sensors, Wheatstone bridge, signal conditioning, instrumentation amplifiers, accuracy vs precision

Full Topic List

1. Ohm's Law
2. Series & Parallel
3. Kirchhoff's Laws
4. Capacitors & Inductors
5. AC Circuits
6. Op-Amps
7. Thévenin & Norton
8. Diodes & Rectifiers
9. Transistors (BJTs)
10. Digital Logic Gates
11. MOSFETs
12. Filters
13. Transformers
14. Signals & Systems
15. Power Electronics
16. Control Systems
17. Transmission Lines
18. Communication Systems
19. Electromagnetics
20. Semiconductor Physics
21. Digital Systems
22. Electric Machines
23. PCB Design
24. Embedded Systems
25. Power Systems
26. Sensors & Measurement

Download

Install app-debug.apk on any Android 8.0+ device.

v1.5 - 22 Topics

What's New

Added 4 new topics, bringing the total curriculum to 22 topics:

• Electromagnetics — Electric/magnetic fields, Faraday's law, Maxwell's equations, EM waves, Lorentz force
• Semiconductor Physics — Band theory, intrinsic carriers, N/P-type doping, drift & diffusion, PN junctions
• Digital Systems — Flip-flops, registers, counters, finite state machines (Moore/Mealy), SRAM/DRAM/Flash memory
• Electric Machines — DC motors, AC induction motors, stepper motors, torque-speed-power, motor control (PWM, VFD, H-bridge)

Full Topic List

1. Ohm's Law
2. Series & Parallel
3. Kirchhoff's Laws
4. Capacitors & Inductors
5. AC Circuits
6. Op-Amps
7. Thévenin & Norton
8. Diodes & Rectifiers
9. Transistors (BJTs)
10. Digital Logic Gates
11. MOSFETs
12. Filters
13. Transformers
14. Signals & Systems
15. Power Electronics
16. Control Systems
17. Transmission Lines
18. Communication Systems
19. Electromagnetics
20. Semiconductor Physics
21. Digital Systems
22. Electric Machines

Download

Install app-debug.apk on any Android 8.0+ device.

v1.4 - 18 Topics

What's New

Added 4 new topics, bringing the total curriculum to 18 topics:

• Power Electronics — Linear regulators, LDO, buck/boost converters, PWM control, efficiency
• Control Systems — Open/closed-loop, PID controllers, stability, gain/phase margin, step response
• Transmission Lines — Characteristic impedance, reflections, VSWR, impedance matching, Smith chart
• Communication Systems — AM/FM modulation, SNR, sampling theorem, digital modulation (ASK/FSK/PSK/QAM)

Full Topic List

1. Ohm's Law
2. Series & Parallel
3. Kirchhoff's Laws
4. Capacitors & Inductors
5. AC Circuits
6. Op-Amps
7. Thévenin & Norton
8. Diodes & Rectifiers
9. Transistors (BJTs)
10. Digital Logic Gates
11. MOSFETs
12. Filters
13. Transformers
14. Signals & Systems
15. Power Electronics
16. Control Systems
17. Transmission Lines
18. Communication Systems

Download

Install app-debug.apk on any Android 8.0+ device.

v1.3 - 14 Topics

What's New

Added 4 new topics, bringing the total curriculum to 14 topics:

• MOSFETs — NMOS/PMOS, threshold voltage, triode/saturation regions, CMOS logic, MOSFET vs BJT
• Filters — Low-pass, high-pass, band-pass, cutoff frequency, roll-off, Q factor, active filters
• Transformers — Turns ratio, voltage/current transformation, impedance matching, efficiency, applications
• Signals & Systems — Fourier series/transform, Laplace transform, transfer functions, poles/zeros, Bode plots

Full Topic List

1. Ohm's Law
2. Series & Parallel
3. Kirchhoff's Laws
4. Capacitors & Inductors
5. AC Circuits
6. Op-Amps
7. Thévenin & Norton
8. Diodes & Rectifiers
9. Transistors (BJTs)
10. Digital Logic Gates
11. MOSFETs
12. Filters
13. Transformers
14. Signals & Systems

Download

Install app-debug.apk on any Android 8.0+ device.