ToF Laser Distance Sensor — DIY PCB & Kits

Available Versions

Bare PCB — $5.95

Bare sensor PCB for your own component sourcing and assembly.

Includes:

1. 1× sensor PCB

No electronic components, ToF module or enclosure included.

Pre-Soldered PCB — $9.95

No solder paste or stencil is required for SMD placement. Place the components, apply flux, and solder them using hot air or two fine-tip soldering irons. Both 0603 and 0805 components can be assembled manually this way.

Includes:

1. 1× sensor PCB
2. Pre-applied/reflowed solder on SMD pads

Electronic components, ToF module and enclosure are not included.

Electronics DIY Kit — $24.95

A complete set of electronic components for assembling the sensor electronics.

The kit includes the PCB and all components required to assemble the electronics.

39 BOM positions / 58 individual components

The SMD components are supplied on short strips of carrier tape attached to a printed BOM / assembly sheet, next to their corresponding BOM entries.

Instead of receiving dozens of unidentified bags, you can work directly from the BOM:
Find the BOM position → identify the component → place it → solder it.

The kit contains:

1. Sensor PCB
2. Complete electronic component set
3. 39 BOM positions / 58 individual components
4. SMD components organized on carrier-tape strips
5. Printed BOM / assembly sheet
6. Pre-programmed ATmega328PB microcontroller
7. Connectors and larger components

The ToF module and enclosure are not included.

Complete DIY Kit — $39.95

The Electronics DIY Kit plus the mechanical parts required to build the complete sensor.

Includes:

1. Sensor PCB
2. Complete electronic component set
3. 39 BOM positions / 58 individual components
4. BOM / assembly sheet
5. SMD components organized on carrier-tape strips
6. Pre-programmed ATmega328PB microcontroller
7. Connectors and larger components
8. 3D-printed enclosure
9. Cable

The ToF module is not included.

Full ToF Sensor DIY Kit — $59.95

The most complete version of the DIY project.

Includes everything in the Complete DIY Kit, plus the ToF module required to build the complete sensor.

Includes:

1. Sensor PCB
2. Complete electronic component set
3. 39 BOM positions / 58 individual components
4. BOM / assembly sheet
5. SMD components organized on carrier-tape strips
6. Pre-programmed ATmega328PB microcontroller
7. Connectors and larger components
8. 3D-printed enclosure
9. Cable
10. Luna ToF module in its original factory packaging
11. Alignment / laser pointer component

The Luna ToF module is supplied separately in its original factory packaging.

BOM Organizer

The Electronics, Complete and Full DIY Kits use a BOM Organizer system designed to make SMD assembly easier.

39 BOM positions / 58 individual components

The SMD components are attached to short strips of carrier tape and arranged on a printed BOM / assembly sheet next to their corresponding component references.

This is particularly useful for the many small 0603 and 0805 components used in the design.

You can simply follow the BOM from top to bottom and identify each component before placing it on the PCB.

Pre-Programmed Controller

For Electronics DIY Kit and higher kit versions, the ATmega328PB microcontroller is supplied already programmed with the sensor firmware.

You do not need to program the microcontroller yourself.

The controller firmware can also be updated via the RS-485 interface without using a programmer.

After assembly, the sensor electronics are ready for connection to the ToF module and final testing.

Assembly

The project is intended for makers who want to assemble the electronics themselves.

Most of the components are SMD, including 0603 and 0805 packages.

The 0603 components can be assembled either with hot air or with two soldering irons. Hot air is convenient for reflowing multiple components at once, while two soldering irons can be used for individual small components.

Typical assembly process:

1. Identify the component using the BOM Organizer.
2. Place the component on the PCB.
3. Apply flux during soldering.
4. Solder the SMD components using hot air or two soldering irons.
5. Solder the larger components and connectors.
6. Install the ToF module if included with your selected version.
7. Assemble the enclosure if included.
8. Connect power and interfaces.
9. Test the completed sensor.

A soldering iron and basic electronics tools are sufficient for many assembly operations. A hot-air rework station is recommended for convenient SMD assembly, but it is not strictly required.

Sensor Specifications

1. Measurement range: 0.2–8.0 m
2. Resolution: 1 mm
3. Measurement error:

±6 cm from 0.2–3 m

±2% from 3–8 m

1. RS-485 Modbus RTU
2. 0–20 mA / 4–20 mA analog output
3. Maximum current-loop load: 250 Ω
4. Supply voltage: 8–28 VDC
5. Power consumption: ≤3 W
6. Configurable update rate: 1–100 Hz
7. 850 nm near-IR ToF technology
8. Approx. 2° beam cone

Firmware & Documentation

The sensor firmware, schematic, PCB design and project documentation are available as part of the open hardware project.

The ATmega328PB supplied with the kit is already programmed with the appropriate firmware.

Which Version Should I Choose?

Bare PCB

For experienced builders who want to source all components themselves.

Pre-Soldered PCB

For builders who already have the components and want to avoid applying solder paste to the PCB.

Electronics DIY Kit

For those who want the complete electronics component set but do not need an enclosure or ToF module.

Complete DIY Kit

For those who want the electronics, enclosure and cable, but already have the ToF module.

Full ToF Sensor DIY Kit

For those who want the complete set required to build the sensor, including the Luna ToF module.