Inside the Lab’s Secret Workhorse: How a DIY Carousel Autosampler Could Change Science Forever

In a quiet corner of the internet, a YouTube creator may have just delivered a shot of adrenaline to laboratory workflows everywhere. Picture this: rows of bottles, a relentless clock, and a scientist’s patience stretched thin by endless, repetitive sampling. Enter Markus Bindhammer and his homemade carousel autosampler - a device that could upend the way scientists collect samples, one spinning tray at a time.

The problem is as old as laboratory science: a set of samples, a need for precision, and the human factor - fatigue, distraction, error. Autosamplers, long a staple in well-funded labs, automate this process, but commercial models can be prohibitively expensive or inflexible. That’s where Bindhammer’s project comes in, blending the hacker ethos with scientific rigor.

The design is deceptively simple - a rotating carousel holding up to 30 small bottles, each ready to be tapped for its precious contents. The brain of the operation is an ATmega microcontroller, a familiar face from the Arduino world, offering both standalone and remote-controlled options via I2C or serial connections. This means the machine can either work independently or act as part of a larger automated setup.

Movement is orchestrated by three stepper motors, each paired with a TB6600 microstep driver, ensuring precise positioning. While the mechanical aspects echo the designs of 3D printers and CNC machines, the real innovation lies in adapting these technologies to laboratory sampling - a field often slow to embrace open-source solutions.

Bindhammer’s initial use case - synthesizing cadmium-selenium quantum dots - demonstrates the machine’s practical value. But the potential stretches far beyond, from high-performance liquid chromatography (HPLC) to spectrometry and beyond. The promise: scientists freed from mind-numbing repetition, labs operating around the clock, and research accelerated by automation.

For now, the project remains a work in progress. The files and documentation are coming, Bindhammer assures his audience. Until then, his build video serves as both inspiration and blueprint for those brave enough to tinker at the edge of laboratory automation.

Will the DIY autosampler become the unsung hero of the modern lab, or is it destined to be a niche curiosity for the technically adventurous? As open hardware creeps into even the most traditional scientific domains, one thing is clear: the carousel is spinning, and with it, the future of laboratory work.

WIKICROOK

• Autosampler: An autosampler automates the collection and introduction of samples for analysis, improving efficiency and accuracy in cybersecurity investigations and digital forensics.
• ATmega: ATmega is a widely used microcontroller family in DIY electronics and Arduino projects, important in cybersecurity due to its role in embedded and IoT devices.
• I2C: I2C is a two-wire serial protocol allowing multiple devices to communicate efficiently, commonly used in embedded systems and electronics for data exchange.
• Stepper Motor: A stepper motor is an electric motor that moves in precise steps, allowing exact control of position and rotation in devices like robots and 3D printers.
• HPLC (High: HPLC is a lab method for separating, identifying, and measuring chemicals in mixtures, vital in pharmaceuticals and quality control.