This is a little toy I made a long time ago—extremely simple. Even buying pre‑made components would cost less than twenty yuan, and the print time is just two hours.

Since it’s been sitting around for so long, the assembly instructions might be a bit disorganized. You can download the white logo from one of my other projects to use as a sticker.

Here’s how to build it (you can also check out “Super Simple Cash Machine Construction Guide: Easily Recreate Without Any Prior Experience – The Finals”)https://www.bilibili.com/video/BV1Juy5BUE2s/?share_source=copy_web&vd_source=38612ef1aa64220cd9fe9151dbac66a7—watch my instructional video for detailed steps.

1. I added a pause feature around layer 30, embedding a small magnet (magnet dimensions: 8mm × 4mm, with an 8mm diameter). Be sure to complete this step quickly to avoid prolonged pauses that could lead to noticeable layer lines. Alternatively, you can print the cash box separately.

2. Circuit Overview

   

• Reed switch (used to detect the magnet)
• MP3 board
• Battery
• Speaker

You can also purchase a ready‑made unit from someone else—typically priced around 15 yuan.

Next, connect the device to your computer via USB and import the in‑game “Steal Cash Machine Audio” (in MP3 format).

When you bring the magnet close to the reed switch, the music will stop playing—indicating that the cash box is inside the withdrawal station.

Remove the cash box from the withdrawal station, and the music will resume playback.

Circuit Placement

The right side shows the interior of the housing.

Attach the reed switch at the location indicated in the diagram.

Then, assemble the remaining components.

Place the power switch at the very bottom—for easy on/off operation.

Finally, secure the base and complete the build.

Support Me (for Free)

If you like this straightforward design, please consider supporting me.