RA-38 REV1 Parts List

U1 - CM119A (presoldered)
U2 - NE555

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

J1 - RJ45 Female Chassis Connector
J2 - USB-B Chassis Jack
J3 - 1/8" (3.5mm) Speaker Jack - switched circuit

JP1 - 16 Pin Machine IC Socket (Jumper Module - Configuration Socket)

8 - #24 jumper wires 1.2" long - stripped on each end.

(1) 8 Pin DIP IC Socket

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"

All LEDs orient with short lead in the square hole.
LED1 - 3mm Red LED
LED2 - 3mm Green LED
LED3 - 3mm Blue LED
LED4 - 3mm Yellow LED

Y1 - 12 MHz Crystal with plastic spacer

Q1 - 2N2222
Q2 - 2N7000
Q3 - 2N2222
Q4 - 2N2222
Q5 - 2N2222

All Resistors are 1/8 Watt
R1  - 4.7k
R2  - 330 ohm
R3  - 1k
R4  - 10k
R5  - 10k
R6  - 10k
R7  - 1M
R8  - 22 ohm
R9  - 22 ohm
R10 - 1.5k
R11 - 1M 
R12 - 100k Pot (104)
R13 - 4.7k
R14 - 1k Pot (102)
R15 - 4.7k
R16 - 1k Pot (102)
R17 - 10k
R18 - 10k
R19 - 1k
R20 - 10k
R21 - 1k
R22 - 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 where the positive 
lead orients.

NOTE: C3 and C5 are presoldered (pre-installed) surface mounted Tantalum capacitors.


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 (yellow - pre-installed)
C4  - 20pF or 22pF yellow or blue MLCC (marked 20, 200 or 22, 220)
C5  - .47uF Tantalum (yellow - pre-installed)
C6  - 10uF electrolytic (observe polarity!)
C7  - 10uF electrolytic (observe polarity!)
C8  - 10uF electrolytic (observe polarity!)
C9  - 47pF ceramic (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 - 47pF small yellow MLCC (marked 47 or 470)
C14 - 47pF small yellow MLCC (marked 47 or 470)
C15 - .1uF .1"LS (Marked 104) (smaller yellow)
C16 - 1uF Tantalum (green or yellow) (observe polarity - printing faces R12 pot)
C17 - .01uF .1"LS  (Marked 103) (yellow)
C18 - 1uF Tantalum (green or yellow) (observe polarity - printing faces R16 pot)
C19 - 100uF  NON-POLAR (larger black electrolytic) (can be installed either way)
C20 - 100uF  NON-POLAR (larger black electrolytic) (can be installed either way)
C21 - 4.7uF small electrolytic (observe polarity!)
C22 - 47pF small yellow MLCC (marked 47 or 470)
C23 - 47pF small yellow MLCC (marked 47 or 470)
C24 - 100uF  NON-POLAR (larger black electrolytic) (can be installed either way)
C25 - 100uF  NON-POLAR (larger black electrolytic) (can be installed either way)
C26 - 47pF small yellow MLCC (marked 47 or 470)

RA-38 REV1 printed circuit board.
LS = Component lead spacing - .1 inches = 2.54mm