ARM architecture like v4/v4T(ARM7), Atmel/NXP/STM microcontroller functionalities / interface / firmware design and development, Arduino, Raspberry Pi, PLL, DDS, Synthesizer, Internet of Things, logic level translators, Buffer, transceiver etc, GPS, PWM, converter, SMPS, buck, boost, Isolated voltage,Battery,Battery charge controller,Solar charge controller, current sensor, Temperature sensor, PIR sensor, Battery Bank charger, Snubber design, RF filter design, RF components selection, RF frequencies selection, Grounding isolation, EMI & EMC etc, pH, ORP, Conductivity measurement, AV TX & RX Modules, IR transmitter & Receiver, PTZ camera, TFT Display, DVR, Sonar, SICK, Motor, Gear Box, Motor Driver, GNSS, Different Xilinx FPGA architecture (7 Series FPGAs, Kintex-7, Zynq-7000), etc.