TransistorPlayground

Walk inside your own circuits.

Transistor is a first-person circuit-building sandbox. You stand on a large board, place components tile by tile, and wire them together to build working digital logic — from a single transistor switch all the way up to logic gates, adders, and beyond.

If you've ever played Minecraft and wondered what it would feel like if Redstone actually worked like real electronics, this is that game.

How It Works

Signal flows from Power Sources through Wires, losing 1 strength per tile. After 15 tiles it dies — place a Repeater to reset it. Use Resistors to deliberately weaken a signal. Connect everything to LEDs to see your outputs light up.

The core mechanic is the transistor. Two types, each behaving like the real thing:

NPN Transistor — normally off. Send signal to the gate and it opens, letting current flow from collector to emitter.

PNP Transistor — normally on. Send signal to the gate and it closes, cutting the current.

Every pin is colour-coded so you always know which side is which:

• 🟡 Yellow = Gate
• 🔴 Red = Collector (power in)
• 🟢 Green = Emitter (power out)

What You Can Build

• NOT gate — one PNP transistor
• AND gate — two NPN transistors in series
• OR gate — two NPN transistors in parallel
• NAND gate — AND gate feeding a PNP
• NOR gate — OR gate feeding a PNP
• XOR gate — NAND + OR feeding a second AND stage
• SR Latch, D Flip-Flop, counters, adders... — build up from gates

Everything is buildable from the components in this game. The same logical completeness as real digital electronics.

Features

• First-person movement — walk around and inspect your own circuits up close
• Signal strength decay and repeaters, just like Minecraft Redstone
• NPN and PNP transistors with real switching behaviour
• Component rotation — press R to orient transistors before placing
• Clock component for driving sequential logic
• Right-click any component to inspect its live signal state
• Hotbar with scroll-wheel and number key selection
• 64 × 64 tile board — room for complex circuits

Current State

This is an early prototype. The core simulation is complete and verified — AND, NAND, OR, NOR, XOR gates all work correctly. Active development is ongoing.

What's coming next:

• Wire visual connection stubs (so wire runs look like lines, not cubes)
• IC save system — save a circuit region as a named reusable component
• Copy/paste regions
• Proper 3D models to replace the placeholder cubes
• Analog simulation (resistors, capacitors, op-amps with real voltage values)

Who Is This For

• People who love Minecraft Redstone and want something more grounded in real electronics
• Anyone curious about how logic gates and digital circuits actually work
• Players who want to build things that compute — calculators, memory, eventually a CPU

Built in Godot 4. Early prototype — feedback welcome.