Project Examples

This is a selection of projects I've done in the past years. Some of it are quite old, but still relevant here to help you decide if we could be a good fit to work together.

Fuel injection computer

Not long ago, the biofuel called E85 was quite popular in Hungary. In general, modern cars were partially prepared to run on E85: there were no problems in warm conditions, and the plastic fuel lines could handle E85 without reducing their lifespan, but there were significant issues with engine start-up in cold weather. Our computer was designed to eliminate these problems and make it possible to use E85 on its own, without mixing it with traditional petrol. It connects to the fuel injection signal cables and slightly modifies the signals coming from the engine control unit, based on parameters such as temperature.

Printed Circuit Board design

Video converter for retro computers

Keeping retro computers alive can be challenging for several reasons, one of which is the lack of CRT displays. There are many different video converters on the market, but they all struggle with certain retro Apple computers because of their non-standard video frequencies. By using a new video A/D chip and an FPGA, I was able to add support for several other machines.

FPGA Verilog

Weather station controller

This is a solar-powered Linux computer capable of handling various weather-related sensors. By collecting and analyzing meteorological data, it helps the farm owner decide when and how much chemicals to use in order to maximize yield. The client’s previous prototype was a collection of different circuit boards wired together. The fact that they could no longer purchase their Linux board triggered the need to develop a single-board computer to be more professional and eliminate supply risks. The availability of electronic components such as processors is generally much more stable than the availability of specific boards.

embedded Linux Printed Circuit Board design firmware

Escape room electronic system

This escape room contains a network of different embedded computers (five Raspberry Pi boards and four custom-designed special-purpose microcontroller boards) that are responsible for audio and video effects, push buttons, LEDs, smoke detectors, and door locks. Depending on the actual game mode (standard, kids, horror), all behaviors can vary.

Raspberry Pi CAN bus Printed Circuit Board design

Medical data logger

This is a battery-powered handheld device with four USB ports and a small display for connecting medical measurement peripherals such as blood pressure monitors, blood glucose meters, and so on. All of a patient’s data can be easily collected and transferred to the cloud with a single button press via the GSM network. With three AAA batteries, it can perform more than 200 transfer cycles. This is the advantage of having a custom Linux-based minicomputer with a well-chosen CPU, RAM, and flash storage, and a carefully optimized embedded Linux system.