R2D2 ESR-LCR METER DESCRIPTION. The device is designed for measuring low resistance, inductance, capacitance and ESR of capacitors. Functionally, the circuit can be divided into eight modules: 1. L / C oscillator 2. Block stable current sources (50mA/5mA/0.5mA) !"#$%&"#'%. 3. Unit responsible for discharge of"%($%#1'/)+1&, the capacitor1+*56#1'+%"#1, test !"#$%&"#'% ($)*+,-+,.)+% */0the 1-2)$)+10 2,/34 )26%"#1 1 789 6%+*)+",#%$%'. :5+6;1%+,/$,=)+10 1+C%$2,;11 (Nokia LCD 3310) 7. PIC18F2520 microcontroller 6. D+%(61 5($,'/)+10 8. Switch (for switching components of the subjects) 7. E16$%6%+#$%//)$ PIC18F2520 8.

D%225#,#%$ (*/0 6%225#,;11 1"(3#5)234 6%2(%+)+#%')

8$1+;1( $,>%#3 LC ?)+)$,#%$, 1 "%%#')#"#')++% ($1+;1( 1-2)$)+10 1+*56#1'+%"#1 1 )26%"#1 (1p – 1uF) (%*$%>+% %(1"3',#< +) '1=5 7#% (%*$%>+% ' %(1",+104 5"#$%&"#',2 6%14 ' 1+#)$+)#) 2,"",. F#2).5 /1G< +)6%#%$3) The"23"/,. principle of the 1-/%=)+% LC oscillator and6 (%*%>+32 therefore the principle of measuring the inductance and %"%>)++%"#1, 6%#%$3) >3/1 ($12)+)+3 ' *,++%& "4)2) 1 ,/?%$1#2) $,".)#,. H/0 1-2)$)+10 1+*56#1'+%"#1 1 )26%"#1 capacitance (1p 1uF) to describe in detail not see the point. This is detailed in the descriptions of 1"(%/4%*12%?% charge the capacitor stable current source to a certain level of voltage (0,2 v) with a parallel 5$%'+0. H,/)), (%*6/A.)++3& 6 '34%*5 F! 216$%6%+#$%//)$ $)?1"#$1$5)# (16 12(5/