$8.99CRUMB Circuit Simulator Build circuits without the burning
Wire LEDs, chips and a microcontroller on a 3D breadboard and watch your electronics come to life.
Is CRUMB Circuit Simulator worth it?
CRUMB Circuit Simulator is worth it if…
- you want to learn electronics without buying components or risking burnt parts
- you enjoy slow, hands-on experimentation at your own pace
- you like building the same thing several different ways just to see what changes
- you already know some electronics and want a cheap sandbox to test ideas in
Screenshots
A workbench with nothing to break
On a real breadboard, one reversed wire can pop a capacitor or cook a chip. In CRUMB, you place resistors, LEDs and integrated circuits as 3D objects on a virtual board, connect them with wires, and see the circuit respond immediately. That freedom is the point. You can sketch an idea, test it, tear it down and rebuild it a different way, all at your own pace. It plays like quiet tinkering rather than a game with missions, and that unhurried feel is exactly why it works for unwinding with a circuit or two.
From first LED to programmable chips
The parts catalogue runs from the basics to the genuinely advanced. Start with resistors, capacitors, switches and LEDs, then move on to transistors, MOSFETs, timers, counters, memory, op amps and seven segment or LCD displays. For software-minded players there is a fully programmable microcontroller, with a built-in code editor you can use to view and edit its source files, and an EEPROM you can program through your own circuitry or fill by hand with the hex editor. Built-in examples show what the parts can do, and a scope lets you attach up to four components and watch the voltages and signals inside your circuit as it runs.
What should you know before starting?
Is CRUMB a game with levels or tutorials?
No. There are no missions, progression systems or step-by-step tutorials, only built-in examples that show what the components can do. It works best as a sandbox you explore yourself, which suits tinkerers who like figuring things out more than players looking for guided lessons.
Can you see what is happening inside a circuit?
Yes, in several ways. Visualisation tools show current and voltage in the wires, logic outputs at component pins, and highlighted pin labels on polarized parts. The built-in scope can track up to four components at once, and there is even a dark mode that switches off the scene lighting.
Do you need to write code to get something out of it?
Not at all. Most of the catalogue, from resistors and switches to logic chips, timers and displays, works entirely with wires. The programmable microcontroller is there when you want to mix software with hardware, and the code editor lets you look at the source files behind it if you get curious.
Is the component library complete?
Not yet. The selection is broad, covering everything from basic passives to memory chips and microcontrollers, but some players find gaps for more specialised designs and work around them with creativity and adaptations. The catalogue is still growing, and the built-in examples give a solid base to learn from.
