~ Function of all the components~ (08/10/2010)
Author: Our Diaries // Category:
It is very important for us to understand the function of all the components before we construct the circuit to prevent any accidents. Thus, today Fazlina (as our leader) had assigned us to find the function of components.
The following are the function of important components:
a) Relay - Acts as a switch when certain amount of potential difference is applied across the solenoid so that the switch is change state to allow potential difference across certain load connected.
b) Transistor BC547 (Q1 and Q2) - form a Schmidt trigger
c) Transistor BC557 (Q3) - Actual switching of relay
d) Transistor BC557 (Q4) - Inverting switch of relay
e) IN4004 diode - Allows an electric current to flow in one direction, but blocks it in the opposite direction
f) SPDT switch - Connects the relay to the collector of either transistors
g) LDR and potentiometer - Form a voltage divider which is used to apply bias to a transistor
h) LED - Show the output by emitting light when an electric current passes through it
The following are the function of important components:
a) Relay - Acts as a switch when certain amount of potential difference is applied across the solenoid so that the switch is change state to allow potential difference across certain load connected.
b) Transistor BC547 (Q1 and Q2) - form a Schmidt trigger
c) Transistor BC557 (Q3) - Actual switching of relay
d) Transistor BC557 (Q4) - Inverting switch of relay
e) IN4004 diode - Allows an electric current to flow in one direction, but blocks it in the opposite direction
f) SPDT switch - Connects the relay to the collector of either transistors
g) LDR and potentiometer - Form a voltage divider which is used to apply bias to a transistor
h) LED - Show the output by emitting light when an electric current passes through it
The websites that we have visited today are:
- http://www.kpsec.freeuk.com/components/relay.htm
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