{"product_id":"the-xl741-discrete-op-amp-kit","title":"The XL741 Discrete Op-Amp Kit","description":"\u003cp\u003eBuild a working transistor-scale replica of the classic and ubiquitous analog workhorse.\u003c\/p\u003e\n\u003cp\u003eThe \"XL741\" Discrete Operational Amplifier kit from Evil Mad Scientist Laboratories is a faithful and functional transistor-scale replica of the μA741 op-amp integrated circuit, the classic and ubiquitous analog workhorse.\u003c\/p\u003e\n\u003cp\u003eAn Operational Amplifier, or \"op-amp\" as they are commonly known, is one of the most useful and common types of analog electronic circuit building blocks. The original μA741 was designed by Dave Fullagar and released by Fairchild in 1968. It quickly became the quintessential and most popular op-amp of all time. While newer op-amp designs may outperform the μA741 in just about every possible respect (speed, noise, voltage range, and so on), the 741 remains widely beloved and in active production today — over 45 years later.\u003c\/p\u003e\n\u003cp\u003eThe XL741 kit was designed by \u003ca href=\"http:\/\/tubetime.us\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eEric Schlaepfer\u003c\/a\u003e, in collaboration with Evil Mad Scientist Laboratories. The kit is lovingly designed to resemble an (overgrown) integrated circuit, based around an extra-thick matte-finish printed circuit board. It comes complete with a beautiful aluminum display stand that gives the circuit board eight legs in the shape of DIP-packaged integrated circuit pins.\u003c\/p\u003e\n\u003cp\u003eDownload \u003ca href=\"http:\/\/shop.emscdn.com\/catalog\/emskits\/741\/kitv1\/741_datasheet_revA.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eDatasheet\u003c\/a\u003e (1.6 MB PDF file).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilding the kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan class=\"floatright\"\u003e\u003ca href=\"http:\/\/shop.emscdn.com\/catalog\/emskits\/741\/kitv1\/desc\/imglrg\/2.jpg\" rel=\"cbdesc\" title=\"741 Assembly\" class=\"cboxElement\"\u003e\u003cimg src=\"http:\/\/shop.emscdn.com\/catalog\/emskits\/741\/kitv1\/desc\/imgmed\/2@2x.jpg\" width=\"400\" height=\"300\" alt=\"741 Assembly\" title=\"741 Assembly\"\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe XL741 kit is sold as an easy-to-build soldering kit. It includes the circuit board, resistors, transistors and capacitor that make up the electrical circuit as well as printed assembly instructions. The kit also comes complete with the \"IC Leg\" stand, and 8 color coded thumbscrew terminal posts.\u003c\/p\u003e\n\u003cp\u003eTo build the XL741 kit, basic electronic soldering skill and tools are required, but no additional knowledge of electronics is presumed or required. You provide standard soldering tools: a soldering iron + solder and small (\"flush\") wire clippers, as well as a Phillips head screwdriver\u003c\/p\u003e\n\u003cp\u003eThe kit features easy \"through-hole\" construction (\"No surface-mount nothin' nowhere!\"), and (assuming that you have prior soldering experience) should take roughly an hour to build.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUsing the \"XL741\" Discrete Op-Amp\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe XL741 circuit is a direct implementation of the \"equivalent circuit\" from the original Fairchild μA741 datasheet, built up using resistors, individual 2N3904 and 2N3906 transistors, and one capacitor. It comes with terminal posts and solder points so that you can actually connect to it and build up classic and functional op-amp circuits. Using those terminal posts and solder points, you can hook up with with bare wires, lugs, alligator clips, and\/or solder joints— however you see fit.\u003c\/p\u003e\n\u003cp\u003eAnd unlike the chip version, you can even hook up probes to monitor what goes on \u003ci\u003einside\u003c\/i\u003e the circuit.\u003c\/p\u003e\n\u003cp\u003eSome performance characteristics are different than those of 741 integrated circuits; please refer to the Absolute Maximum Ratings and Electrical Characteristics\u2028 in the datasheet for additional details.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKit size\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe XL741 kit printed circuit board is 5.215 X 3.175 inches (13.25 X 8.06 cm) in area, and (nominally) 0.100\" (2.54 mm) thick.\u003c\/li\u003e\n\u003cli\u003eIncluding the \"Integrated Circuit Legs\" stand and terminal posts, the overall size of the assembled kit is nominally 5.215 X 3.9 X 1.70 inches (13.25 X 9.9 X 4.3 cm).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eMaterials and construction\u003c\/b\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe decorative stand is smooth to the touch and made of anodized aluminum.\u003c\/li\u003e\n\u003cli\u003eThe circuit board in the kit is extra thick for rigidity, and made with a matte-black solder mask finish. It comes pre-fitted with eight 8-32 threaded inserts for the terminal posts.\u003c\/li\u003e\n\u003cli\u003eAll materials (including the circuit board and stand) are RoHS complaint (lead free).\u003c\/li\u003e\n\u003cli\u003eThe included terminal post screws are stainless steel thumbscrews with color-coded plastic caps (1 red, 1 black, 6 gray).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDownloads and additional resources\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdditional specifications are given in the kit's \u003ca href=\"http:\/\/shop.emscdn.com\/catalog\/emskits\/741\/kitv1\/741_datasheet_revA.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003edatasheet\u003c\/a\u003e (1.6 MB PDF file).\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"http:\/\/shop.emscdn.com\/catalog\/emskits\/741\/kitv1\/741_instrux_RevA.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eKit assembly instructions\u003c\/a\u003e (1.5 MB PDF file). \u003ci\u003ePrinted instructions are included with the kit.\u003c\/i\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe central documentation page for the kit is found \u003ca href=\"http:\/\/wiki.evilmadscientist.com\/741\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ehere\u003c\/a\u003e on our documentation wiki.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Evil Mad Scientist","offers":[{"title":"Default Title","offer_id":1017474245,"sku":"EMS-741","price":36.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/741_2.jpg?v=1419258999","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/the-xl741-discrete-op-amp-kit","provider":"Pimoroni Ltd","version":"1.0","type":"link"}