DRA-50 REV1 thru REV3 Parts List

U1 - CM119A (presoldered)
U2 - LM386 JRC386
U3 - LM386 JRC386
U4 - NE555
U5 - EEPROM (optional - not normally supplied or installed)

D1 - BAT43 (blue - observe polarity!)
D2 - BAT43 (blue - observe polarity!)
D3 - 1N4004 - 1N4007 (black - observe polarity!)
D4 - 1N4148 (dark orange - observe polarity!)
D5 - BAT43 (blue - observe polarity!)

J1 - Mini-DIN-6 Female Chassis Connector
J2 - USB-B Chassis Jack

These headers are installed so the shorter section is inserted (soldered) into the board
JU1 - 3 pin header - green - with shorting bar or "shunt"
JU2 - 3 pin header - yellow - with shorting bar or "shunt"
JU3 - 2 pin header - blue - with shorting bar or "shunt"
JU4 - 2 pin header - blue - with shorting bar or "shunt"
JU5 - 3 pin header - blue - with shorting bar or "shunt"
JU6 - 2 pin header - blue - with shorting bar or "shunt"
JU7 - 3 pin header - blue - with shorting bar or "shunt"

These headers are installed so the shorter section is inserted (soldered) into the board
H1 - 4 pin header - white - with jumper
H2 - 4 pin header - white - with jumper 

LED1 - 3mm Red LED
LED2 - 3mm Green LED
LED3 - 3mm Blue LED
All LEDs orient with short lead in the square hole.

(3) 8 Pin DIP IC Sockets

Y1 - 12 MHz Crystal

Q1 - 2N2222
Q2 - 2N7000
Q3 - 2N2222
Q4 - 2N2222

All Resistors are 1/8 Watt
R1  - 4.7k
R2  - 330 ohm
R3  - 1k
R4  - 10k
R5  - 1 Meg ohm
R6  - 22 ohm
R7  - 22 ohm
R8  - 1.5k
R9  - 10k
R10 - 1 Meg ohm
R11 - 10k
R12 - 100k Pot (104)
R13 - 4.7k
R14 - 10k Pot (103)
R15 - 10k
R16 - 10k Pot (103)
R17 - 10k
R18 - 4.7k
R19 - 10 ohm
R20 - 10 ohm
R21 - 1k
R22 - 10k
R23 - 10k

NOTE:  Components that are supplied on a "carrier" paper should have their leads cut from the 
carrier near the edge of the paper.  Don't try to pull the component away from the carrier 
otherwise you could damage it.

NOTE: Some components have pre-bent leads and they'll need to be reformed to allow 
the part to fully seat on the surface of the circuit board.

NOTE:  Polarized capacitor locations include a + (plus sign) silkscreened on the board 
where the positive lead orients.

C1  - 47pF small yellow MLCC (marked 47 or 470)
C2  - 20pF or 22pF yellow or blue MLCC (marked 20, 200 or 22, 220)
C3  - .47uF Tantalum (blue) (observe polarity!) (See below for installation note)
C4  - 20pF or 22pF yellow or blue MLCC (marked 20, 200 or 22, 220)
C5  - .47uF Tantalum (blue) (observe polarity!) (See below for installation note)

C3 and C5 installation note:
The positive lead is on the right side when the printing is facing you.
C3 is installed so its printing faces C2.
C5 is installed so its printing faces C13.
These two Tantalum capacitors may be preinstalled surface mounted parts on blue boards.

C6  - 10uF electrolytic (observe polarity!)
C7  - 10uF electrolytic (observe polarity!)
C8  - 10uF electrolytic (observe polarity!)
C9  - 47pF small yellow MLCC (marked 47 or 470)
C10 - 4.7uF small electrolytic (observe polarity!)
C11 - 4.7uF small electrolytic (observe polarity!)
C12 - 4.7uF small electrolytic (observe polarity!)
C13 - 4.7uF small electrolytic (observe polarity!)
C14 - 4.7uF small electrolytic (observe polarity!)
C15 - .1uF .1"LS (Marked "104")(small yellow)
C16 - 47pF small yellow MLCC (marked 47 or 470)
C17 - 47pF small yellow MLCC (marked 47 or 470)
C18 - 47pF small yellow MLCC (marked 47 or 470)
C19 - 4.7uF small electrolytic (observe polarity!)
C20 - 47pF small yellow MLCC (marked 47 or 470)
C21 - 4.7uF small electrolytic (observe polarity!)
C22 - 4.7uF small electrolytic (observe polarity!)
C23 - .047uF .1"LS (small yellow - marked 473)
C24 - .047uF .1"LS (small yellow - marked 473)
C25 - 100uF  (polarized electrolytic) (observe polarity!)
C26 - 100uF  NON-POLAR (larger black electrolytic) (can be installed either way)
C27 - 100uF  (polarized electrolytic) (observe polarity!)
C28 - 100uF  NON-POLAR (larger black electrolytic) (can be installed either way)
C29 - reserved - not currently assigned
C30 - .01uF .1"LS  (Marked "103")(small yellow)
C31 - 1uF Tantalum (green or yellow) (observe polarity - printing faces R12)
C32 - 1uF Tantalum (green or yellow) (observe polarity - printing faces C22)


DRA-50 REV1 & 2 printed circuit boards - Green
DRA-50 REV3 SM printed circuit boards - Blue 
LS = Component lead spacing - .1 inches = 2.54mm