The Electronics & Instrument Design Core Resource provides hands-on design and fabrication of specialized equipment for research projects. Projects involve analog and digital electronics design, microcontroller, software development and optical and embedded processor design. The core director, John Hunt, MSEE, is a senior research engineer and instructor in the Department of Biomedical Engineering, OHSU School of Medicine. OHSU School of Medicine. He has worked as a research engineer at OGI/OHSU since 1980 and has developed equipment for many research projects and departments.
"This instrument measures the number of oscillations or pulses per second in a repetitive electronic signal."
Multiple instances of this instrument are maintained.
"Laser diode driver is a constant current source, linear, noiseless, and accurate, that delivers exactly the current to the laser diode that it needs to operate for a particular application. The user chooses whether to keep laser diode or photodiode current constant and at what level. Then the control system drives current to the laser diode safely and at the appropriate level."
"The laser diode is a laser where the active medium is a semiconductor similar to that found in a light-emitting diode. The most common type of laser diode is formed from a p-n junction and powered by injected electric current. The former devices are sometimes referred to as injection laser diodes to distinguish them from optically pumped laser diodes."
An electronic oscillator is an electronic circuit that produces a repetitive electronic signal, often a sine wave or a square wave. They are widely used in innumerable electronic devices. Common examples of signals generated by oscillators include signals broadcast by radio and television transmitters, clock signals that regulate computers and quartz clocks, and the sounds produced by electronic beepers and video game.
"PIC is a family of Harvard architecture microcontrollers made by Microchip Technology, derived from the PIC1640 originally developed by General Instrument's Microelectronics Division. The name PIC initially referred to "Peripheral Interface Controller".
PICs are popular with both industrial developers and hobbyists alike due to their low cost, wide availability, large user base, extensive collection of application notes, availability of low cost or free development tools, and serial programming (and re-programming with flash memory) capability"
"A pulse generator can either be an internal circuit or a piece of electronic test equipment used to generate pulses.
Simple pulse generators usually allow control of the pulse repetition rate (frequency), pulse width, delay with respect to an internal or external trigger and the high- and low-voltage levels of the pulses. More-sophisticated pulse generators may allow control over the rise time and fall time of the pulses. Pulse generators may use digital techniques, analog techniques, or a combination of both techniques to form the output pulses. For example, the pulse repetition rate and duration may be digitally controlled but the pulse amplitude and rise and fall times may be determined by analog circuitry in the output stage of the pulse generator. With correct adjustment, pulse generators can also produce a 50% duty cycle square wave. Pulse generators are generally single-channel providing one frequency, delay, width and output. To produce multiple pulses, these simple pulse generators would have to be ganged in series or in parallel."
"A spectrum analyzer or spectral analyzer is a device used to examine the spectral composition of some electrical, acoustic, or optical waveform. It may also measure the power spectrum.
A spectrum analyzer is a laboratory instrument that displays signal amplitude (strength) as it varies by signal frequency. The frequency appears on the horizontal axis, and the amplitude is displayed on the vertical axis. To the casual observer, a spectrum analyzer looks like an oscilloscope and, in fact, some lab instruments can function either as oscilloscopes or spectrum analyzers."
Includes design, assembly and layout.
"In the field of computer science, an interface is a tool and concept that refers to a point of interaction between components, and is applicable at the level of both hardware and software. This allows a component, whether a piece of hardware such as a graphics card or a piece of software such as an internet browser, to function independently while using interfaces to communicate with other components via an input/output system and an associated protocol.
In addition to hardware and software interfaces, a computing interface may refer to the means of communication between the computer and the user by means of peripheral devices such a monitor or a keyboard, an interface with the internet via Internet Protocol, and any other point of communication involving a computer."
Microprocessor hardware and firmware design for custom instrumentation.
Includes analog and digital electronics design, low noise and biomedical electronics design, and development of software and mechanical and research equipment.
Hardware and software design and development for instrument controllers, data loggers, etc. using inexpensive microcontrollers, particularly PIC brand microcontrollers. Program development in C language and assembly language.
Analog electronics design for research equipment.
Design and development of sensors using optical techniques.
Extensive experience developing custom instrumentation for unique research needs. Also debugging and repair services for legacy equipment.
Includes consultation on instrumentation problems and electronics.
Electrical circuit simulation using Cadence PSpice or Linear Technology LTSpice.
Design of telemetry equipment using off the shelf radio modems or custom designed components. Range 12 inches to 20 miles.
Development of equipment requiring short range wireless telemetry (1 to 100 meters) using standard modules (Bluetooth, low energy Bluetooth, etc.) or custom circuitry.
"Cadence® Pspice® is a full-featured, native analog and mixed-signal circuit simulator. Used in conjuction with PSpice A/D, PSpice Advanced Analysis tools help designers improve yield, and reliability of their designs."