Specifications

8
PARTS LIST FOR FINGER BOARD II
Bill Of Materials, all parts can be found from Radio Shack, Digikey, JDR and Jameco. All resistors ½
Watt or less. All similar parts found on “Handy Board” can also be used on Finger Board.
Item # Quantity Part Reference # Description
1 1 C1 1uf tantalum capacitor, 25 volts or greater
2 4 C2,C5,C6,C7 .1uf monolithic capacitor
3 2 C3,C4 22pf capacitor (20pf can be substituted)
4 5 C8,C9,C10,C11,C12 1uf tantalum capacitor, 16 volts or greater
5 C13 Note: C13 is no longer needed
6 1 D1 HLMP-1790 LED (2ma rating)
7 1 D2 1N4007 or 1N5817
8 1 D3 1N4148
9 D4,D5 1N5817 (optional, only for external SRAM battery backup)
10 1 JP1 OST 2 terminal block connector 3.5mm lead spacing.
Digikey Part#ED1514-ND
11 7 JP10,JP12,JP13, JP16 Header 2x1 (all headers are .1" straight male double row
JP17,JP18,JP19 Jameco Part#103405 - snap apart to correct length)
12 1 JP2 Header 7x2
13 1 JP4 Header 4x2
14 2 JP6,JP11 Header 2x2
15 2 JP7,JP8 Header 8x2
16 1 JP9 Header 10x2
17 2 JP14,JP15 Header 3x2
18 J1,J2,J3,J4,J5 Solder Pads (on PCB, not a part)
19 1 P1 Female DB9 pin connector short profile
20 Q1 BS170 or MOSFET N (optional, for remote serial reset)
21 4 R2,R5,R6,R8 10K ohm resistor
22 1 R3 1Meg ohm resistor
23 1 R4 47Kohm 10 pin inline resistor pack. (Part# 10-1-473)
24 1 R7 2.2K ohm resistor model#90-1555 LED (3ma) or
1K ohm resistor HLMP-1790 LED (2ma rating)
25 2 S1,S2 Momentary normally open push button switch
Digikey Part# SW263CT-ND
26 1 U1 DS1233m (Note: DS1233 can be used, but its pins are
positioned differently from the DS1233m)
27 1 U2 LM7805 or LM340T (+5 volt regulator)
28 1 U3 DS1230AB/Y Dallas 256kbit (32Kbyte) battery backed static
ram. Substitute a DS1244Y if a real time clock is needed.
You can also use a Dallas DS1216D 28 pin lithium battery
socket but will need separate 256kbit 62256-100LP static
memory chip
29 1 U4 MC68HC11A1FN CPU (Motorola)
30 1 U5 74HC573
31 1 U6 74HC00
32 1 U7 74HC138
33 1 U8 MAX232CPE (Maxim)
34 1 Y1 8Mhz Crystal - Series
35 1 IC socket 28 pin socket
36 1 IC socket 52 pin PLCC socket
37 2 3x2 Female IDC connectors
38 1 Ribbon cable - 6" length , 6 conductor
39 Optional 16x2 character LCD module
40 Optional Beeper 5Volt TTL or speaker
41 BT1 3 Volt Battery (optional external battery for SRAM backup)
42 1 PCB Finger Board II printed circuit board
Optional items not included:
½" 4-40 plastic standoffs for mounting, 2 jumper shunts for JP6
Use headers with a contact lead length of .230"(shorter style) for expansion boards.
Prototype expansion board with .1" spacing, can be found at your local Radio Shack.