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The light barrier is in itself a relatively simple construction. Most of us are probably familiar with it from our physics lessons or from electronics kits, where the apparatus consists of a light source, usually in the form of a light bulb or LED, and a receiver element, mostly a light-dependent...

Photo sensors bridge the gap between light and electronics. Microchip's Programmable Gain Amplifiers (PGAs) are not well suited for precision applications (such as CT scanners), but they can be effectively used in position photo sensing applications minus the headaches of amplifier stability. When...

...an in-rush current of. Hg in Glass Thermostat. many times its steady state rating. Figure AN1007.4. Normally Closed Temperature Controller. The control device S indicated can be either electrical. 1. or mechanical in nature. Light-dependent resistors and. A mercury-in-glass thermostat is an extremely...

The Reed Switch contact rating is dependent on the switch size, gap size or ampere turn rating, contact material and atmosphere within the glass capsule. To receive the maximum life for a given load some precautions may be necessary. ./37560e00-029a-4e74-a20a-adcc66dff10a CONTACT PROTECTION...

...is dependent mostly on the current, not the voltage. Theoretically, every electron transforms into a photon and a fixed percentage of the photons escape the LED chip as visible light. For low-quality solutions, a resistor is enough to limit the current if the supply voltage is constant. It is worth noting...

When designing a combustible gas safety monitoring system for oil/gas, petrochemical or other applications, how do you decide whether to use infrared or catalytic gas detector technology? Both sensing technologies have their advantages dependent upon your application's specific requirements...

Designers face a challenge to inexpensively amplify small signals-signals that usually have nonlinear and temperature-dependent characteristics-and to condition them in such a way as to enable them to be safely transmitted over long cables in a rough industrial environment. A designer also needs...

The damage potential of a blast wave is dependent upon both the. force it exerts on an object and the duration over which the force is. applied. An assessment of this damage potential requires. measurement of: (1) the peak static overpressure and (2) the total. impulse per unit area of the blast...

Programmable Current Source Reference Design. A Microchip MCP1631 PWM controller and a low-cost PIC16F616 microcontroller are used to manage a SEPIC (Single Ended Primary Inductive Converter) powertrain. The SEPIC topology is then used to drive and dim Light Emitting Diodes (LEDs). Dimming Power LED...

...the objective. This design uses a relaxation. retain the last state (charging or discharging). When V-. oscillator to create a frequency dependent on the. is above the upper limit, C2OUT goes low, and the sys-. capacitor value. The resistor value of the RC oscillator. tem will begin discharging...

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