Garage Parking Assistant

🚗 Garage Parking Assistant

Laser-guided LED parking helper for tight garages

Never hit the wall again.

This DIY parking assistant helps you stop in the perfect position every time when entering a small or tight garage. Using a laser distance sensor and RGB LED feedback, the system clearly shows how close the vehicle is to the wall ahead.

Perfect for daily use, repeatable parking, and protecting your bumper.

✨ How It Works

When the car approaches from more than 5 meters away, the sensor detects movement and starts a short startup animation (a full green ring sweep animation) as a loading effect.

As the vehicle gets closer, the LEDs gradually change:

• 🟢 Green = safe distance

• 🟡 Yellow = getting close

• 🔴 Red = stop soon

When the vehicle reaches the final 20 cm zone, the device displays a short stop animation shown as a horizontal line pattern (-)

When leaving the garage, the sequence runs in reverse. Once distance exceeds 5 meters, all LEDs switch off automatically. If no movement is detected, the LEDs also switch off after 2 minutes.

🔥 Why You’ll Want This

• Protect bumpers and walls

• Park consistently every time

• Clear visual guidance

• Clean wall-mounted design

• Significantly cheaper than factory parking sensor systems (front sensors).

• Fully customizable in software

🖨 Difficulty Level

Intermediate DIY Project

Recommended skills:

• Basic soldering

• Basic electronics knowledge

• Arduino IDE basics

• General 3D printing experience

🧰 Required Hardware

Electronics

• 1x Seeeduino XIAO SAMD21

• 1x DFRobot SEN0337 ToF laser distance sensor

• 1x NeoPixel Jewel – 7 x WS2812 5050

Mechanical Parts

• 1x Corrugated tube
  7 mm inner diameter / 10 mm outer diameter / approx. 60 cm length or longer

• 1x M2.5x4 ISO 4762 / DIN 912 screw
  (used to hold the XIAO board in place)

• 4x M5x16 ISO 7380-1 / DIN 7380 screws
  (used for the lid with NeoPixel cover)

• 5x M4x22 countersunk screws for plastic inserts
  (used to mount the main and sensor unit to the garage wall)

Others

• 1x Clear plastic blister packaging piece
  thickness below 0.5 mm

• 1x Velleman K/MOW colorful wiring set

• Some heat shrink tubing

• Old phone charger with USB-C cable

🖨 Recommended Print Settings

Designed for ABS for improved durability in garage environments.

• Scale: 101% (ABS shrink compensation)

• Use text sheet / textured sheet

• Glue stick recommended

• Use brim to reduce warping

• Enclosure strongly recommended

• Allow print to cool fully before removal

🔌 Wiring Guide

https://circuitcanvas.com/p/o9msbz18zr3mhe9sd46

Sensor ↔ XIAO (UART)

⚠ RX/TX must be connected diagonally.

Power Wiring

New Wiring Version (most common)

Old Wiring Version (early units - my use case)

⚠ Always verify your cable version before powering the board.

Sensor documentation:
https://wiki.dfrobot.com/sen0337/#tech_specs

NeoPixel ↔ XIAO

🛠 Assembly Guide

1. Prepare Wiring Harness

I recommend starting with the cable harness first.

The ToF sensor comes with a cable. Cut off the section with the separate male connectors.

Decide how far the main unit will be from the sensor module.

Leave approximately 15–20 cm extra cable that go outside main unit (for soldering purpose).

Then:

• Cut corrugated tube to length

• Cut four wires to matching length + reasonable reserve (as mentioned above)

• Solder wires to the original harness

• Use heat shrink tubing for protection

• Feed complete harness through corrugated tube

One end should finish with:

• white sensor connector

Other end:

• four separate wires

Use the same wire colors on both sides to simplify installation.

Basically we just remove connectors and extend original harness.

2. Sensor Unit

• Route cable through housing opening

• Connect sensor module (with white connector)

• Secure with two M2.5 nuts

3. Cover / LED Unit

• Solder three wires to NeoPixel Jewel

Cut a square piece from clear plastic:

25 x 25 mm (23mm - NeoPixel + 1/2mm extra)

Insert the square piece into the top slot.

Inside the housing there is a small slope marking the wire exit direction.

Rotate the NeoPixel accordingly and secure it using the included retaining insert (slide in).

4. Main Unit

• Route cable through housing hole

• Install XIAO board

• Secure with M2.5x4 screw

• Complete wiring connections and soldering

• Close housing

💻 Firmware / Code

Install latest Arduino IDE and:

1. Seed SAMD Boards (add support for Xiao SAMD board)

2. Adafruit NeoPixel Library (Github)

Select board:

Seeeduino XIAO

Connect, customize and upload example sketch:

https://gist.github.com/pr0way/ee8e3d4a0df21326500c545997ee8e59

You can change:

• stop distance

• LED colors

• brightness

• animations

• timing

• sensor behavior

⚙ Calibration

Maximum range ~5 m, but practical range is lower due to noise and reflection losses.

Keep in mind small variation of around 1.5 cm depending on surface and reflection.

Example:

If you want a real stop point of 20 cm, set around 21.5 cm in software to create a safety margin.

Designed for indoor garage environments; see sensor datasheet for full optical characteristics.

Always test with your own vehicle, real world environment.

🚗 Installation Tips

1. Mount the Main Unit first

2. Then mount the Sensor Unit module

3. If Main Unit is positioned correctly, the Sensor can naturally align using gravity

4. Fine-adjust sensor angle if needed

5. Test multiple parking attempts

📁 Included Files

1. Main Unit

2. Sensor Unit

3. Addons (include Sensor mounting plate + NeoPixel slide part + XIAO blocker)

4. Cover (just Main unit cover)

💡 Customization Ideas

• Different LED colors / animations

• Adjustable brightness

• Different braking points

❗ Important Notice

All models and printing parts were manually created in Tinkercad. AI-assisted content includes the cover image, this description, and source code / snippets.

❤ If You Like It

Please leave a like, rating, or post a Make photo — it really helps.

Happy printing and safe parking! 🚗