Much experience in electronic (hardware) from developing hardware base on microcontroller or microprocessor to service of electronic PCBs.

Begin on 8051 familly in 2001 used in many devices to AVR microcontrollers familly used until now, from past:

2006 ThermoSystem
Extensive system for measuring temperature. It bases on DS18B20 sensors plugged in one bus. The system has ability connect up to 16 sensors. The configuration is done by computer program (via RS-232). The visualization of data are presented on a graphic display (based on t6963c controller). The device has got  ability to define alarm state HIHI/LOLO: reach alarm level gives sound alarm, and electric signal on line. Last device  was integrated with Caller for Nokia device (code name: CosmoN). That makes possible to inform about alarm by SMS or voice dial connection (base on AT codes on nokia cell phone). The system has been mounted, and works fine.

2006/2007 Combo 
Combo System is a part of multimedia advertisement. The device has been designed and made for a well known Warsaw company. There have been created several versions of such devices. They have been made as prototypes, they are built usually as a couple, so two devices of one type. The device allow to play MP3 music files from a SD memory card. The file transfer to the device from a computer is done by USB bus. Device has got two electrical circuits to control the outside power devices. When Combo is in normal (idle) mode, one switch is on, the second is off, and also it plays continuous one MP3 music file. When a button (connected by wires to device) is pushed, the device is in work mode, the first switch is off, second on, and the device plays different music file. When it ends the device backs to the idle state.

2006/2007 Kaboom - mobile robot
Student's fun! Robot built in free time with controlling from laptop Aristo FT-8500 (windows application) but commands from ipaq (well very early smartphone on Windows Mobile OS) by WLAN network.