Wednesday, 22 April 2015

switches - What happens if the Forward voltage of a diode is not met?


Ihave been playing around with transistors and diodes lately, and thinking about switching methods and techniques.


I'm not that educated on the matter of "Forward Voltage", but I illustrated a concept I am trying to grasp in the photo below:


A circuit consisting of 1.5v battery, capacitor and diode, resistor


In this circuit concept, I have a 1.5V battery hoked up across the terminals of a capacitor, but...there is a cathode of a diode hooked up between the negative terminal of the battery and the negative terminal of the capicitor.


The Diode, attached to a current limiting resistor,can provide a path to the other terminal of the capacitor, but only if the forward voltage is met???


Is that so? Would the diode act as some type of "flood-gate", allowing the battery to store electrical potential in the capacitor, until the pressure is adequate to provide the forward voltage to the diode?


My goal, or what I envision, is that I could hook up a relay or transistor the other end of the capacitor/ battery, and the temporary discharging of the capacitor would momentarily "power" the switch, allowing me to momentarily connect another power source to make a light blink or something.



If the diode funcctions in tth way I assume, then it would probably do this in a constant cycle, and could possibly be timed in accordance to functionality.


I'm just not sure if this is the actual science...




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