Showing posts with label checker. Show all posts
Showing posts with label checker. Show all posts

Thursday, August 28, 2014

Human Reaction Checker Circuit


This is wonderful schema.by using this schema you can measure whether you have good reactions or not because If you dont have speed reactions you are unable to get decisions quickly.Just think you are driving your vehicle at once a person appeared in front of your vehicle.at that situation you must have quick reaction to stop your vehicle.This schema allow you to check it.If it is weak by practicing with this schema you can improve it.






Here this LED blinks every 1.5s.But the light will appear only for 0.1s within that short period you must try to press the button.try this
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Friday, August 22, 2014

Transistor quality checker

Transistor are the components that have never missed on any electronic circuit . To determine whether the quality is still good or is damaged then need for testing of the transistor . This test is needed before it is installed in an electronic circuit to avoid disappointing results in the future. Thus , all transistors are mounted has been declared unsuitable for use . Please note that th e damage was not located from the transistors can not stand the temperature is too hot . Therefore emphasized here for use tongs as a heat barrier when soldering each feet transistor.

Part List :
R1=47R
R2=100R
R3=Resistor with adjustable  to the current
Vr1=10K trim
Q1=Transistor socket
S1=Saklar on/off
G1=3V battery

To facilitate testing , the provided holes for the third feet on the transistor Q1. At thefoot of the emitter is connected to the battery (+). Base associated with Vr1, and the collectors associated with R2. The voltage (-) that enter the R3 give ampMeter to check quality of the transistor.

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