DRA-Pi-Zero REV1 & REV2 Parts List:
REV2 parts and notes in [brackets]

U1 - WM-8731S Audio CODEC SMT - Preinstalled
U2 - LM1117-3.3 LDO Voltage Regulator SMT
P  - Red 3.0mm LED
B  - Blue 3.0mm LED
C  - Green 3.0mm LED
D1 - 1N4148 Diode
Q1 - 2N2222 Transistor

TX Channel Selector - 3-pin Green Header w/short
RX Baud Selector - 3-pin Blue Header w/short
RY1 - 5V Reed Relay
Y1 - 12.000 MHz Crystal with Spacer
L1 - 470 or 470J (47 uH) Molded Choke SMT
TRRS 3.5MM (1/8") Shielded Female Audio Jack
Mini-DIN-6 Shielded Female MD6 Jack
40 position (20X2) Double-Spaced Pi Header Socket

Resistors and Potentiometers:
All fixed resistors are 1/8w with leads.
[REV2 resistors are 1206 SMT of the same value]
R1 - 4.7k
R2 - 330 ohm
R3 - 1k
R4 - 10k
R5 - 1k
R12 - 104 Pot 3386P
R14 - 102 Pot 3362P

Capacitors:
C1 - 106 1210 SMT
C2 - 104 0805 SMT [1206]
C3 - 10uF Polarized Electrolytic
C4 - 104 0805 SMT [1206]
C5 - 22pF  [1206 SMT]
C6 - 106 1210 SMT
C7 - 106 1210 SMT
C8 - 104 0805 SMT [1206]
C9 - 22pF  [1206 SMT]
C10 - 100uF Non Polarized Electrolytic
C11 - 4.7uF Polarized Electrolytic
C12 - 4.7uF Polarized Electrolytic
C13 - 100uF Non Polarized Electrolytic
C14 - 100uF Non Polarized Electrolytic
C15 - 100uf Polarized Electrolytic - Low ESR
C16 - 47pF  [1206 SMT]
C17 - 47pF  [1206 SMT]
C18 - 106 1210 SMT
C19 - 104 0805 SMT [1206]
[C20 - 104 1206 SMT]

DRA-Pi-Zero Printed Circuit Board
REV1 (Red Board)
REV2 [Violet Board]