I am trying to make a simple Atari punk console.i am new to electrical engineering. I am trying to figure out what to solder to each pin of the jack to make the finished product work.
The schematic of this circuit contains only one output. The output is labeled as "-4 dB Line Output." Some circuits will have multiple outputs.
There are three ideas in the label: -> -4 dB (the nominal level where the units are actually dBu not dB). -> Line (Line denotes a relatively stronger signal used to directly drive a headphones or a speaker). -> Output (the function).
This circuit has a mono output (2 wires) not a stereo output (3 wires). Before soldering the jack to the circuit board, obtain a cable with a 3.5 mm mono male connector at each end. Plug one end of the cable into the jack. Use an ohm meter to determine which pin on the jack corresponds to the "tip" on the cable. Then, use the meter to determine which pin on the jack corresponds to the "sleeve" on the cable. Connect the tip of the jack to the output and the sleeve of the jack to ground (pin 7 on the 556).
In the photograph I see seven pins on the jack [this is probably a stereo jack (stereo can have ~seven or fewer pins, mono can have ~five or fewer pins) which is completely ok for mono or stereo]. The middle pin on the jack is probably the tip. The outer four pins are probably all sleeve (ground). The two remaining pins are probably ring (not needed for mono, only used for stereo). If you use mono headphones or a mono speaker, the ring can stay unconnected. If you use stereo headphones, connect an extra wire between the tip and the ring.