Dual Voltage/Current Display

Resistors
(0.25 W unless indicated otherwise)
R1 = 499Ohm 1% 0.6W
R2 = 1.00kOhm 1% 0.6W
R3,R15,R21,R22,R23 = 10kOhm 5%
R4,R6 = 100kOhm 5%
R5,R16 = 68kOhm 5%
R7 = 3.3kOhm, 5%
R8 = 47kOhm 5%
R9 = 12kOhm 5%
R10 = 45.3kOhm 1% 0.6W
R11,R12 = 24.0kOhm 1% 0.5W
R13,R14 = 6.81kOhm 1% 0.6W
R17,R18,R19,R20 = 100Ohm 5%
R24 = 4.7Ohm 5%
R25 = 470Ohm 5%
R26 = 15Ohm 5 %
P1 = 200Ohm trimpot, e.g. Vishay Spectrol type M64W201KB40
P2 = 5kOhm trimpot, e.g. Vishay Spectrol type M64W502KB40
P3 = 500Ohm trimpot, e.g. Vishay Spectrol type M64W501KB40
P4 = 10kOhm trimpot, e.g. Piher type PT10LV10-103A2020
Capacitors
C1,C4,C5,C6,C8,C9,C10,C13,C14 = 100nF ceramic, lead pitch 5mm
C2,C3 = 15pF 2%, ceramic, lead pitch 5mm
C7 = 100µF 25V, radial, lead pitch 2.5mm
C11,C12 = 10µF 63V, radial, lead pitch 2.5mm
C15,C16 = 220µF 25V, radial, lead pitch 3.5 mm
C17,C18,C19,C20 = 47nF, ceramic, lead pitch 5mm
Inductor
L1 = 10µH 10%, axial, Rs = 0.29Ohm, e.g. Epcos type B78108S1103K
Halfgeleiders:
D1,D2,D3,D4,D5 = BAT85
T1 = BC639
IC1 = LMC6464BIN
IC2 = LM35CZ
IC3 = ATmega168-20PU, programmed, contained in kit # 100166-71
IC4 = 7805
IC5 = 79L05
B1 = 80V, 1.5A bridge rectifier (pinout ~ + ~ –), e.g. Semikron SKBB80C1500L5B
Miscellaneous
K1,K2,K3 = 6-pin (2x3) pinheader, lead pitch 0.1 in. (2.54mm)
K4 = 6-pin pinheader, lead pitch 0.1 in. (2.54mm)
K5,K6 = 2-way PCB terminal block, lead pitch 5mm
J1,S1 = 2-pin pinheader, lead pitch 0.1 in. (2.54mm)
LCD1 = 16-pin pinheader, lead pitch 0.1 in. (2.54mm)
LCD1 = 16-pin SIL connector for display, lead pitch 0.1 in. (2.54mm)
X1 = 10MHz quartz crystal, HC-49/S, 50ppm, CL = 12pF
LCD, 4x20 characters with background lighting, dim. 60 x 98 mm, e.g. HTDISPLAY HC200401C-YF62L-VA
PCB # 100166-1
Software en PCB design files: free download
Kit of parts incl. PCB, programmed controller and LCD: Elektor order # 100166-71