Armando Concepcion

This project involved automotive telemetry reporting via Bluetooth Low Energy (LE), WiFi, and LoRa WAN. The idea was to develop a CAN interface for OBD-II automotive telemetry and relay the vehicle data telemetry over MQTT, LoRa WAN, and WiFi. The project aimed to send vehicle data to a cloud system for later integration and analysis, allowing for massive intelligent diagnostics.

This project helped electric utility customers save energy by detecting low electrical peak hours and operating the cooling or heating accordingly. The projected developed devices performed current energy consumption measurements relating to HVAC or climate control. The data generated was then relayed through wireless technologies, including MQTT, WiFi, and LoRa WAN.

The project aimed to measure the AC voltage and current that controls various HVAC devices. The current data was relayed via MQTT, WiFi, and LoRa WAN using gateway and point-to-point solutions. We ultimately helped customers save money on energy by operating the HVAC compressor or heat pumps during low peak hours and tailoring the operation accordingly.

This project involved building a home/business automation multi-thermostat controller IoT hub. The devices ran a Modbus-protocol telemetry reporting array and control of a 14-channel opto-solid state relay.

Our goal was to control multiple thermostatic contactors via opto couplers with Raspberry Pi as the brains. We also performed signal acquisition and tested devices, monitored 14-channel multiplexed signals from sensors and actuators, and handled complex circuitry. We managed to control multiple signals and monitor industrial, HVAC, and IoT devices using an app via wireless technologies.

The project aimed to design test equipment for gasoline direct injection (GDI) at 65 volts and common rail direct injection (CRDI ) at 120 volts, mostly on diesel and some gasoline engines. The testers aimed to test these two types of injectors.

The project was particularly challenging because we had to implement two waveform designs that were radically different from each other, leveraging two separate circuits with different pulse width modulation (PWM) schemes. As a result of our efforts, we built two testing solutions for two separate GDI and CRDI injectors with varying ranges of voltage and PWM schemes.

I built circuit hardware to capture and measure small magnetic fluctuations in various magnetic devices, such as valves and motors. The system cleaned the signal and applied analysis to detect faulty magnetic components. Using it as an input to an oscilloscope or graphing multimeter was also helpful for signal display and analysis.

A hardware device meant to fully control all kinds of electromechanical apparatuses. The challenge was in making the tester circuit regulate and variate not just output frequency but also dirty cycle and voltage output, while maintaining resistive and reactance compatibility. This devices usefulness was that one unit could be used to test all sorts of magnetic components, motors, valves and other inductive or magnetic components.