Jeroen Brinkman is a Dutch maker who builds rather than describes, and makes visible rather than explains, the fundamentals of computer technology. His most characteristic work revolves around the recreation of basic digital concepts: from a fully functioning relay computer (MERCIA) to an electromechanical Turing machine and binary counters built from separate relays and diodes. What sets Jeroen apart is his ability to make the invisible visible. Whether it is the steps of binary addition, the logic of a Turing machine or the difference between binary and balanced ternary - he builds demo machines that you can see working with your own eyes. That passion is also reflected in his involvement with The Young Researchers, a makerspace for children ages 10 to 18, where he passes on his knowledge to the next generation.