| NOTES: |
1) The layout is shown from the copper side. All
components except the links and 2 diodes noted below
are mounted on the other side of the board
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2) If zero insertion force sockets are used mount all
links near them first as they will cover the holes
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3) X signifies a track cut through, • is a soldered
connection, lines shown as •——————• are tinned
copper links, three of which are tapped part way
along their length (b, c and d)
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4) Decoupling capacitors are not shown, but 0.01 to
0.1 µf are recommended (1 per ic)
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5) The following insulated wire links, mounted on the
copper side of the board, are not shown:
| IC1 pin 15 to 10kOhm a | IC3 pin 9 to 2708
pin 8 |
| TR5 coll. to 2716
pin 20 | IC3 pin 13 to 2708 pin 1 |
| IC3 pin 15 to 2716 pin 19 | |
Connect the 2708 pins 1,4,5,6,7,8,9, 10, 11, 22 & 23
to the corresponding pins on the 2716 socket
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6) A 1N4148 diode is connected from +5v to pin 21,
2716 (cathode to pin21) and another 1n4148 from pin
21, 2716 to pin 18, 2708 (cathode to pin 21)
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