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# Leakage Current Light

9 Threads found on edaboard.com: Leakage Current Light

## Triac leakage current with LED light

There is a mathematical solution, if you are interested , by computing impedance of LEDs and caps. Also LEDs would benefit with a diode bridge after the triac to give DC instead of half wave rectified by LEDs to reduce flicker when on. light dimmers often flicker on LED lamps not designed for this and need a small tungsten night light or load

## Unwanted voltages at circuit input

Why not look at the extremely high leakage current of the 1N5817 Schottky diodes on its datasheet? It's maximum reverse-biased leakage current is 20 thousand times higher than an ordinary 1N4148 diode. But a 1N4148 diode is in a glass package and is affected by light. The diodes might not be needed because (...)

## what is the fuss about negative feedback configuration with opamps?

The polarity of the output from an opamp amplifying a photodode can be positive or negative. Also there ore two ways to do it: Photo-current leakage (light causes reverse leakage current) or photo-voltaic (it becomes a tiny solar cell). An opamp amplifier always has negative feedback.

## Extendng the life of a car indicator relay?

Despite of the imagined leakage current problem, modern cars replace mechanical relays with smart power switches, except for a very few cases, e.g. main "ignition" switch or starter motor. A serious calculation of battery capacity reveals why even a mA sum of bias and leakage currents won't be a problem, actual smart power (...)

## Photodiode isolation

A photodiode has less capacitance when it is reverse-biased. Then light on it causes its leakage current to increase. It will have a small amount of "dark current" that is spec'd on its datasheet. A photodiode without reverse bias operates like a tiny solar cell and generates a voltage and current.

## SSR vs Conventional Relay??

what is the advantage of SSR vs Conventional Relay and its application?? Thank you SSR have also disadvantages when comparing with normal, mechanical relays .. One of them is the leakage current, which in some circumstances may, for example, cause a fluoro light to “glow” even if the SSR is OFF ..

## How to check if a photodiode is in good condition?

You have to respect the maximum forward current and reverse voltage specification. Measuring forward voltage and reverse leakage current with a multimeter can act as rough check.

## P-well resistor leakage at 160C and its dependency on the voltage bias

I gonna use the P-well resistor in my design. But, I am concerned about the its accuracy. I know that is the value will be changed by difference bias voltage. but by how much percentage? Also, will that be too leaky(current) around 160C? Can someone help shed some light on it? Thank you very much

## Matrix sensor made of LEDs

Excellent idea, and relatively simple. Scanned LEDs like this are off most of the time. Reverse bias the LED and the leakage current goes up and down with the amount of light, just like a photodiode but the LED isn't made as sensitive as a real photodiode. Still useable.. Notice the whole matrix graph go up when his hand blocks more (...)