Summary of SLOT MACHINE HAS A HANDLE ON FUN
Digital slot machines often lack the tactile satisfaction of a handle, a feature [John Bradnam] restored in his open-source project. This three-color matrix slot machine uses an Arduino Pro Mini to control three 8×8 matrices and a custom driver board. Pulling a spring-loaded handle triggers a micro switch to spin the reels, display scores, and sound a piezo buzzer upon victory. The device can also function as a clock if gambling is not desired.
Parts used in the Open-Source Three-Color Matrix Slot Machine:
- Arduino Pro Mini
- Three 8×8 matrices
- Custom driver board
- Spring-loaded handle
- Micro switch
- Piezo buzzer
For some reason, when slot machines went digital, they lost their best feature — the handle. Who wants to push a button on a slot machine, anyway? Might as well just play video poker. [John Bradnam] seems to agree, and has built an open-source three-color matrix slot machine complete with handle.

In this case, you’ll be losing all of your nickels to an Arduino Pro Mini. The handle is an upgrade to an earlier slot machine project that uses three 8×8 matrices and a custom driver board. When the spring-loaded handle is pulled, it strikes a micro switch to spins the reels and then snaps back into place. Between each pull, the current score is displayed across the matrix. There’s even a piezo buzzer for victory squawks. We only wish the button under the handle were of the clickier variety, just for the feels. Check out the short demo video after the break.
If you’re not a gambler, you could always turn your slot machine into a clock.
Source: SLOT MACHINE HAS A HANDLE ON FUN
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What feature did digital slot machines lose?
Digital slot machines lost their best feature, which is the handle. -
How does the user start spinning the reels?
Spinning is triggered by pulling a spring-loaded handle that strikes a micro switch. -
What component controls the logic of the machine?
An Arduino Pro Mini is used to run the project and manage the game logic. -
How are the results displayed on the device?
The current score is displayed across three 8×8 matrices between each pull. -
Does the machine provide audio feedback for winning?
Yes, a piezo buzzer sounds victory squawks when a win occurs. -
Can this project be used for purposes other than gambling?
Yes, the slot machine can be turned into a clock if you are not a gambler. -
Is the source code for this project available?
Yes, the project is described as an open-source build.
