Justin Eskridge, P.E. Email & Phone Number

Tulsa, Ok, Us

High-power switching regulator design.High-precision data acquisition.System integration of multiple intelligent modules over Ethernet, CAN, SPI, and analog links.High-noise electromagnetic environment, requiring robust analog, digital, and software designs.Good stuff! I like it a lot :-)

Tulsa, Ok, Us

Leadership : *Supervised and provided mentoring to EE interns *Supported and advised new-hires in the EE departmentMedium-Diameter Fusion Machine Automation : *Long term project to develop automatic plastic-pipe fusion machine package from scratch *Personally responsible for all electrical and software aspects *Used Solidworks to lay out prototype electrical enclosures *Traveled internationally to conduct research, oversee product deployment, and provide support *Extensive collaboration with mechanical and hydraulics engineers, manufacturing, vendors, sales, marketing, customers, and tech supportPortable Electromechanical Automatic Fusion Machine *Close collaboration with mechanical and software engineers to achieve very tight integration of components and leverage new technologies across multiple disciplines. *Designed novel systems for controlling actuators to achieve target forces and positions with a high degree of accuracy *Personally responsible for all firmware, circuit-design, and PCB layout *Designed and laid-out high-density PCBs to provide a diversity of features with minimal footprint

Tulsa, Ok, Us

Water chemistry meter *Assigned to existing project, stalled by problems *Discovered faults in the op-amp circuit design and corrected *Rewrote existing MSP430 firmware to correct problems and add featuresSecurity keypad *Selected all electrical components, including PIC processors, keypad, LEDs, buzzer, motor driver, and photo-interrupter *Generated schematics, and laid out PCBs *Wrote all firmware for driving motor, reading keypad, storing data in EEPROM, monitoring battery level, and driving indicator lights. *Designed user interface for managing multiple access codes via numeric keypad *Coordinated with mechanical engineering to tune and troubleshoot the final designData recorder *Collaborated with software engineer to connect data recorder hardware to pocket PC via bluetooth *Designed power supply circuits for generating 5V and 3.3V from two D-cell batteries *Selected all electrical components including infrared and hydraulic pressure sensors. *Wrote all firmware. Designed all circuits. Supervised EE tech in creation of PCB. *Characterized IR sensor output for use in measuring heater surface temperatures *Developed automatic calibration and adjustment system for maintaining sensor accuracy *Created system of multiple, redundant EEPROM records for reliable storage of calibration dataApplied-fin factory-floor machine revision *Assigned to update electrical system for next generation of existing machine *Reduced cost and complexity of overall system by combining several separate systems into a centralized system using programmable automation features of main motor controllers. *Wrote all automation code using a mixture of structured-text and function-block methods *Coordinated with another Electrical Engineer to implement communication with a Linux PC to provide graphical user interface, web interface, and remote diagnostic capability.

Tulsa, Ok, Us

Control board testing, design revision, and retrofit *Designed and built a test fixture for evaluating RMA control boards *Devised and implemented a testing plan to recreate intermittent problems reported from the field *Discovered a design change to prevent observed failures *Conducted exhaustive testing to verify effectiveness of solution *Compiled test report for presentation to executive committee *Personally modified hundreds of boards to apply fixPocket PC Sensor Interface *Used a logic analyzer and PCMCIA documentation to learn CF ATA interface to pocket PC *Wrote microcontroller firmware to emulate flash card memory device for relaying sensor data *Wrote verilog code to emulate UART via CF+ interface on an FPGA device