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101 Circuits + Algorithms Bundle

Two engineering puzzle and sandbox games in one: Train your hardware and software engineering muscles together with 101 Circuits and Algorithms.

101 Circuits

101 Circuits is an electronics puzzle game about turning a set of components into a working circuit. Draw wires between terminals and watch the result on the oscilloscope. Each puzzle is solved when every output matches its target signal. Any valid circuit that produces the required signals is accepted.

Begin with simple connections and LEDs, then progress to capacitors, filters, transistors, amplifiers, and oscillators. Practice each new idea through several circuits before taking on the next challenge. Smooth a pulse, shape a waveform, or generate a repeating signal.

The built-in Learn library explains component symbols, connections, and behavior through diagrams, formulas, and practical examples. Puzzle guides help you understand the concepts behind each challenge. Open a component's help or practice circuit directly from a puzzle. Build everything visually with the mouse and keyboard, with no programming required.

Algorithms

A self-contained offline algorithm practice application with a built-in retro C compiler. 150+ problems across twenty categories, for programming interview preparation and for keeping the skill current.

• Browse a searchable catalog with difficulty, category, and solved state
  
• Open a problem and read the description, example inputs and outputs, and hints
  
• Write C, with a real-time source disassembly showing how it becomes machine code
  
• Drop down to assembly with asm { } blocks
  
• Run the complete test set, including the hidden cases, and validate your solutions
  
• Record accepted runs with tests passed, instructions executed, and code size
  
• Work in a polished modern environment or a retro one simulating 1980s GUIs

The sandboxed virtual machine has no clock, no randomness, and no host access. The same solution costs the same number of instructions on every machine, so a recorded best is worth comparing.