RA-35 REV1 thru REV5 Parts List
REV-4 and 5 printed circuit boards are Red

U1 - CM119A (presoldered)
U2 - LM386 JRC386
U3 - LM386 JRC386
U4 - NE555
U5 - EEPROM (REV2 and later) (presoldered)

D1 - BAT43 (observe polarity!)
D2 - BAT43 (observe polarity!)
D3 - 1N4004 - 1N4007 (observe polarity!)
D4 - 1N4148 (observe polarity!)

J1 - DB9 Female Chassis Connector
J2 - USB-B Chassis Jack
JU1 - 3 pin header - green - with jumper (shorter part installed (soldered) into the board)
JU2 - 3 pin header - yellow - with jumper (shorter part installed (soldered) into the board)

H1 - 4 pin header - black (or white) - with jumper (shorter part installed (soldered) into the board)
H2 - 4 pin header - black (or white) - with jumper (shorter part installed (soldered) into the board)

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

(3) 8 Pin 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 (changed value [from 4.7k] 6/1/2020 to match brightness to other LEDs)
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
R15 - 10k
R16 - 10k
R17 - 10k
R18 - 4.7k
R19 - 10 ohm
R20 - 10 ohm
R21 - 1k
R22 - 10k (REV2 and later)
R23 - 10k (REV2 and later)

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 where the positive 
lead orients.


C1  - 47pF small yellow MLCC (marked 47 or 470)
C2  - 20 or 22pF yellow or blue MLCC (marked 20, 200, 22, 220)
C3  - .47uF Tantalum (blue) (observe polarity!) (** See Note Below)
      compared to C5)
C4  - 20 or 22pF yellow or blue MLCC (marked 20, 200, 22, 220)
C5  - .47uF Tantalum (blue) (observe polarity!) (** See Note Below)

** C3 and C5 are polarity sensitive.  The positive lead is on the right side when 
the printing faces you, and the leads are pointing down.

C3 is installed so the printing faces C2.
C5 is installed so the printing faces away from C4.

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 (observe polarity!)
C11 - 4.7uF small (observe polarity!)
C12 - 4.7uF small (observe polarity!)
C13 - 4.7uF small (observe polarity!)
C14 - 4.7uF small (observe polarity!)
C15 - .1uF .1"LS (Marked "104")(smaller 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 (observe polarity!)
C20 - 47pF small yellow MLCC (marked 47 or 470)
C21 - 4.7uF small (observe polarity!)
C22 - 4.7uF small (observe polarity!)
C23 - .047uF .1"LS (really small yellow - marked 473)
C24 - .047uF .1"LS (really small yellow  - marked 473)
C25 - 100uF (polarized electrolytic) (observe polarity!)
C26 - 100uF NON-POLAR (black)  (can be installed either way)
C27 - 100uF  (polarized electrolytic) (observe polarity!)
C28 - 100uF NON-POLAR (black)  (can be installed either way)
C29 - reserved - not currently assigned
C30 - .01uF .1"LS  (Marked "103") (yellow)
C31 - 1uF Tantalum (green or yellow) (observe polarity - printing faces center of board)
C32 - 1uF Tantalum (green or yellow) (observe polarity - printing faces center of board)

RA-35 REV1, 2, or 3 printed circuit board =  Green
RA-35 REV4 & REV5 printed circuit board =  Red
LS = Component lead spacing - .1 inches = 2.54mm
MLCC = multi-layer ceramic capacitor.