| Train Module Main Page | Circuitry | Assembly and Tuning | Parts List |
Parts List
RESISTANCES (all 1/4 W / 10%)
¤ R1,R9 100k
¤ R2 820 ohms
¤ R3,R5,R11,R14,R15 1K
¤ R4 ,R19,R20 4.7K
¤ R6,R13,R18 10K trim pot PC mount
¤ R10 300K
¤ R16 18K
¤ R7,R8,R12,R17 10k
¤ R21 1Meg
¤ R22 680 ohms
CAPACITORS
¤ C1 470uf/25 v, PC mount
¤ C2,C10 10uf
¤ C3 .001 uf /polyester
¤ C4 .068 uf
¤ C5,C7,C8 1 uf
¤ C12,C13 .1 uf
¤ C6,C15 .047 uf
¤ C11 220 uf/25v , PC mount
¤ C14 20 uf
¤ C9 Not used
ICs
¤ IC1 TIL 112 Opto Isolator 6 pins DIP
¤ IC2,IC7 741 Op Amp 8 pins DIP(or OpAmps of your choice,
not critical)
¤ IC3 LM566 VCO 14 pins DIP
¤ IC4 CD4017 CMOS Counter 14 pins DIP
¤ IC5 LM386 Power Amplifier 8 pins DIP
¤ IC6 LM556 Dual timer 14 pins DIP
Other Parts
¤ RT1,RT2 Rectifier bridge 50v/1A or 8 Rectifier diodes
rated 50v/5a
¤ VR Voltage Regulator 7812 pos 12 VDC/1A TO220
¤ ZD1 Zener diode=1N704(4.1v 250mw) or 1N749(4.3v 400mw)
¤ D1 to D7 1N4148 diodes or equivalent(1N34)
¤ S1 Small SPDT toggle
¤ Switch Horn switch Small normally open push button switch
¤ Speaker 8 ohms, 2" to medium size
¤ Sockets 8 pins,4 ea
14 pins,3 ea
NOTE: For a power on indicator connect an LED in series with 1K
resistor across the supply bus AFTER the switch.
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| Train Module Main Page | Circuitry | Assembly and Tuning | Parts List |
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Questions and comments to roma60@home.com
© Laurier Gendron, Burnaby, B.C., Canada. 1998