Jarkko Hämäläinen Email & Phone Number

R&D Department

I'm currently working as a R&D-engineer and a PCB-designer in applications of heavy duty industry. This includes currents varying from microamp to kiloamp level. Voltages from uV to dozens of kV. Multilayer boards. Combination boards with kW-level power sources and complex and sensitive mcu control sections: Bluetooth, touchscreens, ethernet, mcu, fpga, bga etc. to mention a few. I'm always keen to learn more and master new tools as well as experiment new ways to solve apart the traditional. I administrate a ECAD and part library and PCBA structures in ERP. I'm most familiar with Zuken Cadstar and Mentor Graphics Pads softwares as I use them on daily basis. I work with close co-operation with mechanical- and industrial designers as well as with prototype laboratorians and production engineers. The thing I really like in PCB-designing is the possibility and requirement to use creativity. PCB-designing is art and the PCB a piece of art. I'm also monitoring existing and evaluating new material in PCB and interconnection technology. This includes developing test methods and ways to control quality. Keeping connections and co-operation with material suppliers is an essential part of all this. I do HW-design and debugging in control level electronics consisting mostly of multilayer boards, digital electronics and measurement circuits such as voltage measurement, wireless current measurement, magnetic position sensory and laser sensory. This is the field which I'm strongly willing to develop my skills and knowledge to gain broad field of skills.

Product Laboratory

The first step was to build a testing environment which could be a setup for a testing a certain smaller entity or a whole end product. Prototype building went hand in hand with integrating measuring circuitry and different sensors in carefully selected locations and understanding the purpose, principle and factors affecting the instruments. Primary interests were voltage, current, power, efficiency, conductive EMC, RF-immunity and temperature measurements and thermal imaging of PCBAs. Mechanical tests were also a part of test runs including mechanical stress measurements, air flow measurements and liquid pressure measurements etc. Building required metal workshop skills as well as special skills as etching PCBs and assembling them with smd manipulator. The primary task itself was to obtain data and run variety of tests in varying environments such as extreme temperatures and humidity. To get valid data it was essential to understand the behavior of variety of circuitry. Some times measurements required a minor designing of measurement circuitry and external control circuitry of the surrounding test setup. Such as special timers and auxiliary power sources. Tuning and finding the final component values for EMC filters was part of this kind designing. Data was obtained primarily with multimeters, oscilloscopes, LCR-meters, spectrum analyzers, data loggers/recorders and IR-cameras. Annual calibrations and writing calibration programs for these instruments were a part of the job. And off course all this data was documented and reported into database.

Insinööri Amk, Bachelor Of Science, Tietokone-Elektroniikka, Computer Electronics

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