Question #f783d
1 Answer
Jan 26, 2018
See the explanation below
Explanation:
Here is a circuit diagram for a
The materials required are :
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The transformer
# " TR1 ""230 V AC" "input"# ,#15V-0-15V " 1A" " output"# -
3 diodes
#"D1 , D2 and D5 "# #"reference"# #"1N2007"# -
1 voltage regulator
#"LM317T"# -
1 Zener Diode
#"D6 " "11.0V 1W"# -
1 capacitor
#"C1 " "470 "muF# -
1 transistor
#"NPN " " Q1" " BD139"# -
2 LEDS, one red , one green
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1 adjustable resistor
#"RV1 " " 10" kOmega# -
5 resistors
#"R1 to R5 " " 1" kOmega, "240"Omega " 1/2W, "#
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Heat sink for the transistor
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switches, wires, solder, board , box