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NewCircuit - DC circuit design in 5 simple, small parts.
“Excellent work, Thanks!”twobitcomputer 1 month ago.
Manufacture Magnetic sensor
“Thank you Again...Top quality in the end...Always a pleasure...Highly recommended Freelancer!”cameronking11 12 months ago.
PCB Designed to detect a Magnet field.
“Great Freelancer...will hire again...”cameronking11 1 year ago.
New project Sequentric
“We have hired Bulba39 previously. In this project, like before, his work has been exceptional. He possesses a great skill set and we will definitely be calling on his expertise again.”dflohr 1 year ago.
Battery backup supply
“Very challenging project from start, involving detection of an adjustable threshold point and switch to backup battery. The challenge was that both batteries had the same voltage = 3 volts (2xAA and CR2032). The approach taken by the engineer is to set the threshold for switching at 1.6 volts (*2) Then use an ideal Oring diode made from mosfets to prevent the flow back on the dead battery (regular diode has high drop). They are chips like that made by only 3 companies Maxim outrageous expensive. Intersil no adjustable threshold and just 32mA maximum output. Linear Technology, expensive also. I am very pleased with the engineer job as just in the first half hour he comes up with the concept and working schematic. Due to my customer requests, we had to go many times back and forth to made changes as requested, but all the changes were just in adjusting the values of the original schematic. I highly recommend this engineer for any analog job (my project was analog).”igeorge5149 2 years ago.
ECU breakout board
“Top quality polished result. Accuracy is critical in the assembly of a 100+ pin breakout board. Understood my requirements and made sensible suggestions for improvements in the layout of the board. Carefully confirmed understandings when it was necessary. Looking forward to working on future projects.”Arniem 3 years ago.
Electronics Hardware Design EngineerJan 2002
I have designed and developed many 8/32 bit micro-controller based electronics circuits, schematics & PCB layout for Silabs, PIC24s, MSP430s, Atmel AT91SAM7, M16C, STM32 CortexM3 ARM MCUs well as Cyclone, Actel FPGAs, DDR2 SDRAMs, high voltage and power electronics power and discrete transistor circuit design, isolated 10-150Wt AC-DC SMPS , non-isolated DC/DC converters, buck, boost, SEPIC. Peripherals USB,I2C,CAN,RS232-485,SPI,LVDS, SDRAM, EEPROM, MMC, JTAG,SATA I have huge experie
Bachelor Degree1988 - 1992 (4 years)
Journal of Applied Spectroscopy
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