Digital Volt and Ampere meter gr

Digital Volt and Ampere meter

Digital_voltmeter.gif (16018 bytes)

Digital_ambermeter.gif (15633 bytes)

Digital_block_supply.gif (7826 bytes)

�� , �� , �� , �� , �� . �� , �� . �� . �� , �� , �� [dp]. �� IC1-3, �� CA31612E, �� A/D Converter for 3-Digit Display. �� Display IC2-4, �� CA3161E, �� BCD to Seven Segment Decoder/Driver. �� Fig.1, �� [+��], �� R1 � �� R3 �� . �� Fig.2 �� , �� , �� R5, �� , �� .

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��: �� , �� 10 �� 11 �� RV1, �� Display, �� . �� 900mV. �� RV2, �� 900mV �� Display. �� .

��: �� , �� 10 �� 11 �� RV4, �� Display, �� . �� +��, �� 10R/10W �� 9V. �� RV3 �� Display 0.90A. �� . �� C4-9, �� . �� R4 �� R7. � �� , �� , �� Fig.3. �� Fig.4. �� , �� 1 �� GR1 �� . �� IC5 �� .

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V in maximum: 100V [99.9V]

A in maximum: 10A [9.99A]

Max. measurement Voltage Error: 100mV

Max. measurement Ampere Error: 100mA

Digital Volt and Ambere meter in English

Part List

R1=680Kohms	C1-5=10nF	IC2-4=CA3161E Intersil-Harris
R2-6=1Mohms	C2-6=47uF 16V	IC5=7805
R3=6.8Kohms	C3-7-10-11=100nF	GR1=4X 1N4001
R4-7=270 ohms	C4-8=220nF 1%	Q1......6=BC557
R5=0.1 ohms 5W	C9=2200uF 25V	DS1......6= 7 Segment Display common anode
RV1-4=50Kohms trimmer 10 turns	C12=10uF 16V	T1=230VAC/6VAC 1A
RV2-3=5Kohms trimmer 10 turns	IC1-3=CA3162E Intersil-Harris

Sam Electronic Circuits 3/02

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