![]() I've also seen a variant of 3.5mm that can be screwed down, which is quite useful for use on stage where you don't want a yank to stop the music - yet e.g. 141" (~3.6mm) and basically incompatible with 3.5mm on raspberry pi)Ī few synthesizers (Buchla and clones ( verify)) use tini-jax which is. has some other uses, like carrying audio and (composite) video on one plug (e.g. Is probably mostly associated with having headphones that include a microphone, around smart phones. 3.5mm is frequently seen in TS, TRS, and occasionally TRRS. The original 1/4" had two contacts, so had a tip and sleeve (TS). Taking 3.5mm and calling it 1/8" is 10% away from the actual size (3.5mm is 0.138", not 0.125") taking 2.5mm and calling it 3/32" is 5% away from the actual size while 2.5mm and 3.5mm are standardized in millimeters, and I do believe always manufactured to mm sizes, so the inch figures are names, not measurements: On units - The 1/4 size is standardized in inches because of its phone network origins ( verify), Often carries consumer line level audio signals, or consumer microphone level when it involves microphones (often electret) 2.5mm Americans sometimes call this 3/32" (Sometimes phone connector but that suggests the 1/4" one) Used for guitars, pro line level (balanced or not), and sometimes for consumer headphones 3.5mm Americans often refer to it as 1/8" best known for three-band ( TRS) in headphones for stereo sound, then often referred to as audio jack, mini-jack, jack plug, stereo plug, and others. Originates from the design of the first telephone exchanges ( verify), which is why this (particularly the mono, TS variant) is also called a phone connector These days they are mostly seen in audio use, seemingly as something not so easy to break The history of plugs like these is complex, and there are some leftovers today that use less usual variants.īut what you're most likely to meet is primarily: The 6.35mm was classically called phone connector (2-lead, TS) though perhaps the largest use today is guitars. The 3.5mm is often known as headphone jack, stereo jack (if TRS, or mono jack if TS), mini jack, or 3.5mm jack, and sometimes things like mini-phone. 'TRS' may be clearer when distinguishing it from plugs in similar use, but the everyday names we use are more specific - and somewhat regional. Mixed use (analog, digital, home electronics, audio) TRS (Tip, Ring, Sleeve) and variations 3.5mm (1/8") TRS plug (bottom left), 16.1.4.5 Flat no-leads package, Micro Leadframe.16.1.4.4 PLCC (Plastic Leaded Chip Carrier).16.1.4.3.1 SOIC (Small-Outline Integrated Circuit).16.1.3 Packages, roughly from fewer to more leads.16 Mounts, chip carriers, packages, board connectors.15.1.4 Test hooks / pincer clips / IC grabbers.15.1.2 Crocodile clips / Alligator clips.12 Power - industrial and multiphase interconnects.11.5 Type A, Type B, household NEMA variants, JISC C 8303 Class II.11.3 Other, non-earthed European plugs: Type C, Europlug, CEE 7/16, CEE 7/17.10 Mains power - wire-to-wire connectors.9.1.3.3 More specific, less standard (car, low voltage/data).9.1.3.2.4 Combined Charging System (CCS).9.1.1 DC connectors, EIAJ power, coaxial and more.8.7 U.FL / MHF / I-PEX / IPAX / IPX / AMC / UMCC.7.3 Memory Stick (Duo, Pro, Micro (M2), etc.).6.1 Modular connector (?P?C) Registered Jack.4.7.1 On Thunderbolt 3, USB3, and USB-C.4.3.3 Early CD drives: Panasonic, Sony, and Mitsumi.4.1.1 AMP/Molex power and Berg power connectors.2.7.11 Specialized or internal display connectors.2.7.2 MiniVGA, MiniDVI, MicroDVI, Mini DisplayPort.2.7 Digital video cables (high speed and/or uncompressed).1.1 TRS (Tip, Ring, Sleeve) and variations.1 Mixed use (analog, digital, home electronics, audio).This feature makes it easy to create a system that is powered by a wall adapter when one is plugged into the jack and by a battery the remainder of the time.įor a DC jack that connects directly to a terminal block for easy connection of wires, see our DC barrel jack to 2-pin terminal block adapter. With nothing plugged into the jack, pins 2 and 3 are shorted together with an adapter plugged into the jack, pin 3 is disconnected. The jack has three pins: pin 1 comes out of the back of the jack and is connected to the center pole, pin 2 comes out of the bottom of the jack and is connected to the side wall, and pin 3 comes out the side of the jack and is automatically switched based on whether there is anything plugged into the jack. This jack is compatible with our wall-adapter power supplies:ĭimensions (in mm) for the DC power adapter barrel jack. This is a standard PCB-mountable barrel jack for DC power adapters with 2.1 mm center holes.
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