Item Reference Part Value Digi-Key Part # Possible Substitute 1 Board
______________________________________________
1 C11,C5 Ceramic Capacitor 100 pf 50V disc Y5P 495-1025-1-ND 2
2 C13 Ceramic Capacitor 0.0022 f 100 V X7R axial leads 1119PHCT-ND 1
3 C3,C6,C7,C8,C9,C10,C12,C14, C15,C17,C18,C19,C20,C21 Ceramic Capacitor 0.1 f 25 V Z4V radial leads 399-2155 14
4 C4 Tantalum Capacitor 1 f 20 VDC radial leads 478-1833-ND 1
5 C2 Tantalum Capacitor 6.8 f 16 VDC radial leads P2037-ND 478-1919-ND 1
6 C1 Tantalum Capacitor 33 f 25 VDC radial leads P2052-ND 478-1897-ND 1
7 C16 Electrolytic Capacitor 330 f 25 V elect axial 4036PHCT 1
8 D1,D4 DIODE 1N4148 1N4148-TPMSCT-ND 2
9 D2 BUZZER 102-1116**** 1
10 D3 LED LED T-1 Dbl Green Diff Flange 160-1142-ND 1
11 JP1,JP2,JP3,JP4,JP5,JP6 2 Pin Header SIP Header 2 Pos straight A23897-ND A30770-ND 6
12 RN1,RN2,RN3 Resistor Array 1.2k array 1.2KEBK-ND ** 21
13 R1, R7, R19 Resistor 51 ohm 1/4w 5% carbon film 51QBK-ND 3
14 R12 Resistor 470 ohm 1/4w 5% carbon film 470QBK-ND 1
15 R8,R20 Resistor 1.1k ohm 1/4w 5% carbon film 1.1KQBK-ND 2
16 R10,R11,R14 Resistor 4.7k ohm 1/4w 5% carbon film 4.7KQBK-ND 3
17 R2,R16,R22,R23 Resistor 10k ohm 1/4w 5% carbon film 10KQBK-ND 4
18 R3,R6,R15,R18 Resistor 11k ohm 1/4w 5% carbon film 11KQBK-ND 4
19 R4,R9,R17,R21 Resistor 12k ohm 1/4w 5% carbon film 12KQBK-ND 4
20 R25 Resistor 47k ohm 1/4w 5% carbon film 47KQBK-ND 1
21 R5 Resistor 100k ohm 1/4w 5% carbon film 100KQBK-ND 1
22 R13 Resistor 120k ohm 1/4w 5% carbon film 120KQBK-ND 1
23 R24 Resistor, variable 100k pot 3/8" SQ Cerm side adj 3296X-104-ND 3296X-104LF-ND 1
24 S1, S3 Switch Toggle SPDT ON-ON CKN1021-ND 2
25 S2,S4 Switch Toggle SPDT ON-OFF-ON CKN1025-ND 2
26 U1 5V 1.0 AMP V Reg TO-220 LM7805CT LM7805CT-ND 1
27 U2,U16 IC Precision Timer 8-dip NE555 296-1411-5-ND 2
28 U3,U12 7ns Comparator AD8561AN AD8561AN-ND AD8561ANZ-ND 2
29 U4 IC 2-IN AND Gate 74LS08 296-1633-5-ND 1
30 U5 QUAD 2-IN Nand Gate 74LS00 296-1626-5-ND 1
31 U6,U9,U13 LED 7-SEG 1.0SNGL Red 7seg 67-1485-ND 3
32 U7,U10,U14 (N) Decade Counter 74LS90 526-NTE74LS90 *** 3
33 U8,U11,U15 BCD-TO-7SEG decoder/dr 74LS47 296-3712-5-ND 3
34 Power Supply 12 VDC - 0.8A 412-112103 ($8.69)*** 1
35 2 Pin Housing polarized A19490-ND 6
36 Crimp (okay to crimp with pliers) A23962-ND 12
37 Heat Sink for voltage regulator 294-1114-ND 1
38 D5 Diode For 2006 Circuit Board only MBR340IR 1
created 10/9/01
modified 6/3/02 – Corrected Part Number for Item 3
modified 11/4/04 – Updated Parts Numbers http://www.digikey.com Digi-Key
modified 11/5/04 – Typo and added Moser Part Number http://www.mouser.com/ ***Mouser Electronics
modified 3/29/06 – Replaced obsolete parts
modified 4/17/06 – Corrected item number for 13 and part number for 35 and added 36 and 37
modified 6/27/06 – Added diode for version 2006 circuit board
modified 1/16/08 – New suggested parts are listed as a possible substitute - suggested by Abaz Kryemadhi
** replace each resistor array with 7 discrete resistors (1.2K 1/8 watt) placed across each location (e.g. from pin 1 to pin 14, 2 to 13 etc.)
so you will need 21 resistors to replace the 3 arrays.
****you will have to bend the leads slightly to fit into the holes for pre 2006 circuit boards