DVM Component List

Resistors

R1 = 82 Ω, ±5%, 1 W , see text
R2, R3 = 510 Ω, ±1%, ¼ W

Rp1 = 22 kΩ, trimmer

Capacitors

C1, C4 = 100 nF, 50 V, ceramic
C2 = 10 μF, 25 V, tantalum
C3 = 1 μF, 63 V, ceramic
C5 = 47 nF, 63 V, polyester

Modules

1 x Arduino Pro Mini (or compatible)

1 x 16x2 LCD display, with backlighting

1 x ADS1115 A/D converter

Miscellaneous

12+12+10+16 Pin Strip, female

Voltage Source Component List

Resistors

R1 = 3 kΩ, 1%, ¼ W
R2, R3 = 10 kΩ, 1%, ¼ W

R4 = 100 Ω, 5% 3 W, wire wound

Rp1 = 10 kΩ, multi-turn trimmer

Pot = 50 kΩ, potentiometer, linear, 10 turns

Capacitors

C1 = 10 μF, 25V, tantalum
C2 = 100 nF, ceramic
C3 = 10 nF, ceramic
 

Semiconductors

U1 = MCP6002, op-amp

U2 = LM236H-2.5, 2.49 V voltage reference

D1 = 1N5819, schottky diode

D2, D3 = 1N4148, diode

Miscellaneous

SW1 = switch, SP

B1...B4 = 4 x AA, 1.5 V alkaline cells with battery holder