Step 4Design Time
2. You will need to make a hole in the board for the battery clip leads. The hole for the prototype was made at hole D15 by carefully twisting an X-Acto knife through the hole until its diameter was enlarged to 1/8-inch (3mm). You can also use a drill.
3. Insert the 556 IC into the top side of the board (without the foil pattern) so that pin 1 is in hole A14 (second A...B...C... series) and pin 8 is in hole U17. (Figure 3 shows the 556 pin outline. You can see the board's hole numbers by turning the board over to see the foil traces.) Secure the 556 in place with a piece of tape, flip the board over and solder all 14 pins to their respective foil patterns. You can, of course, install the 556 elsewhere on the board. Just be sure that all the pins of the 556 are inserted into their own foil patterns.
Figure 2. Parts layout for an assembled version of the Atari Punk Console.
Figure 3. Pin outline for 556 dual timer.
4. Insert a bare jumper wire between 556 pins 12 and 13 and solder in place.
5. Insert a yellow jumper wire between 556 pins 2 and 6 and solder in place.
6. Insert a yellow jumper wire between 556 pins 10 and 14 and solder in place.
7. Insert a blue jumper wire between 556 pins 5 and 8 and solder in place.
8. Insert a blue jumper wire between 556 pins 4 and 14 and solder in place.
9. Bend one lead of R2 against itself and insert the leads between 556 pins 1 and 2 and solder in place.
10. Insert R1 so that an outer pin is in the same foil trace as pin 1 of the 556 and solder the outer and center pins in place.
11. Insert a gray jumper wire between the center terminal of R1 and 556 pin 4.
12. Insert R3 so that an outer pin and the center pin are across the foil traces for 556 pins 13 and 14 and solder in place.
13. Insert C1 across 556 pins 6 and 7 and solder in place.
14. Insert C2 across 556 pins 7 and 12 and solder in place. If C2 is polarized, the plus (+) lead goes to pin 12.
15. Insert the minus (-) lead of C3 in the same foil trace as pin 9 of the 556 and solder in place.
16. The plus (+) lead of C3 is connected to optional volume control R4 (see Fig. 1) or directly to one of the speaker terminals. (R4 is not used in the assembled circuit shown in Fig. 2, but you can insert it now or later if the circuit's sound is too loud.) After you decide where to install the speaker (see step 17), insert the plus (+) lead of C3 where it will share a common foil trace with one of the two speaker wires.
17. After you decide where to install the speaker (see step 17), connect a red jumper wire between pin 4 of the 556 and a common foil trace where the second speaker wire will be soldered.
18. If you use the speaker shown in Fig. 2 and listed in the Parts List, you will need to connect connection leads to its terminals. The small, bare, U-shaped jumper wire in the Jameco JE10 Wire Jumper Kit works well. Invert the speaker and insert one end of a jumper through one of the speaker terminals. Hold the emerging length of the jumper with long-nose pliers and solder the "U" portion of the jumper to the speaker terminal. Be sure to pull upward on the wire so that it will extend outward from the speaker. Repeat this procedure for the second speaker terminal. Finally, insert the two connection leads you've added into appropriate holes in the board that match up with steps 15-16.
19. Insert the battery clip leads through the top side of the board and tie them into a knot on the foil side of the board. Leave plenty of length on the top side of the board.
20. Flip the board over and solder the red battery clip lead to any of the wires emerging from the foil trace connected to 556 pin 14.
21. Solder the black battery clip lead to any of the wires emerging from the foil trace connected to 556 pin 7.
22. Put on some safety glasses and clip off all the excess wire lengths emerging from the back side of the circuit board.
23. When the circuit is finalized, attach the battery to the board using double-sided tape or a 9-volt battery holder (see parts list).
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