Showing posts with label voltage. Show all posts
Showing posts with label voltage. Show all posts
Thursday, January 9, 2014
Over voltage Protection Circuit Diagram
This is a Over voltage Protection Circuit Diagram. A silicon-controlled rectifier is installed in parallel with the 12-V line and connected to a normally-closed 12-V relay, K1. The SCRs gate circuit is used to sample the applied voltage. As long as the applied voltage stays below a given value, SCR1 remains off and Kls contacts remain closed, thereby supplying power to the load.
When the source voltage rises above 12 V, sufficient current is applied to the gate of SCR1 to trigger it into conduction. The trigger point of SCR1 is dependent on the setting of R1. Once SCR1 is triggered (activating the relay), K1s contacts open, halting current flow to the load.
Over voltage Protection Circuit Diagram
Friday, December 27, 2013
Under voltage Indicator for Battery Equipment Circuit Diagram
This is the simple Under voltage Indicator for Battery Equipment Circuit Diagram. Due to the low duty cycle of flashing LED, the average current drain is 1 mA or less. The NE555 will trigger the LED on when the monitored voltage falls to 12 volts.The ratio of Rl to R2 only needs to he changed if it is desired to change the voltage point at which the LED is triggered.
Under voltage Indicator for Battery Equipment Circuit Diagram
Sunday, April 7, 2013
Voltage Mirror
There have many ways to get negative and positive allowance strain with only applies one transformer secondary reels. this planning is one of its the realization.
This circuit applies second bridge rectifier, D1...D4, where rectifier holds mutually transformer capacity passed C1 and C2. Because of the strain yielded isolated by DC to transformer. Where circuit unconnected with rectifier D5....D8, hence positive terminal C3 earns unconnected directly to line 0V to give symmetrical power supply allowance.
Because C3 loaded from higher level impedance than C4, because of erection of condenser C1 and C2, hence this condenser must have higher level value compared to C4. Otherwise, hence impedance in and wrinkling strain from negativity allowance would many differing from his its positive allowance.
Condenser working stress at least having to equal to transformer strain peak value. with component values like the one passed to circuit diagram, transformer strain 15V can ration finite of 0,1A with shrink strain 1V. condenser values can be turned into bigger with the same factor to less shrink strain. election of bridge rectifier must have enough work reach to overcome maximum transformer top strain and payload current.
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