Wiring diagram question

[Antonio1963]

Please bear with me I am still not clear on the input jack tabs. The pin is easy but the " ring" and sleeve are mixing me up. On the diagram I can't tell which is which. Are the pin,the jack and the sleeve usually wired to the same place on a board?On the diagram below Is the input jack wired for center positive or negative?

[GibsonGM]

Tip is the signal-carrying part. You can plug in a patch cord, and touch one meter probe to the 'tip' of the plug, and the other to each of the jack terminals...you'll get BEEP on the one that is connected to the tip!   (set meter to continuity test, of course).  TIP goes to the board "input" for your input jack, and board "output" for the output jack....

Sleeve is the 'barrel' of the plug, the lower part.  It runs thru the center of the jack, you can see this if you plug it in.    Do the same test to find ITS terminal.  that is usually "battery minus", or ground. 

The last one is the "ring"...it's just a SWITCH (insert a plug and watch it operate!, and is the last remaining tab.    When I started, I'd mark them with black, blue and red marker, LOL.   Since it is our switch, it goes off to the other grounds in your diagram.   This allows it to interrupt the ground connection when you pull out the plug, so the power shuts off and saves your battery.

Usually, you'll use just a stereo jack...that is "TRS" (tip, ring, sleeve), a switching jack.    All that matters is that the 'barrel' of your plug is used to connect the ground points and complete the circuit.


Re. the DC jack...this might help: https://learn.adafruit.com/crickit-lab-shaker/wiring-dc-jack

Most pedals use "Boss power DC jack" setup, which is center NEGATIVE.  You can confirm your pins with your meter.   There is another switch built-in here, which DISCONNECTS the battery if you insert your power jack...or closes that 'wire', with no jack inserted, so the power can then come from the battery thru the DC jack.   Hence the 2 red wires in your diagram.

HTH!

[Kevin Mitchell]

That's for a stereo cable. If they shared the same connection that would make it's use redundant. Maybe it should have been labeled as a switching jack instead. So the input would hit negative ground when it's not plugged in. So really there is no "ring" connection.

-KM