The lm3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten leds, lcds or vacuum fluorescent displays, providing a logarithmic 3 dbstep analog display. Lm3915n lm3915 dotbar led lcd nixie display driver dip18 1. If you want to monitor audio the lm3916 is a better. Here is highperformance lm3914lm3915 vu meter circuit projects that can display with 20 leds on stereo or mono with 10 leds for all audio system. If the 1 resistor is a pot, it becomes the led brightness control. The simplified block diagram illustrates this extremely simple external circuitry. Lm3916 dotbar display driver general description the lm3916 is. Snvs740c january 2000revised march 20 typical performance characteristics supply current operating input bias current vs vs temperature temperature figure 2. The pcb is designed for use with the lm3915 led driver but may be used with the lm3914 or lm3916 by changing two resistors per ic. Reference adjust pin current reference voltage vs vs temperature temperature figure 4.
Lm3914 data sheet, product information and support. Led currentregulation led driver saturation dropout. Lm3916 dotbar display driver general description the lm3916 is a monolithic integrated circuit that senses analog voltage levels and drives ten leds, lcds or vacuum fluorescent displays, providing an electronic version of the popular vu meter. Dec 10, 2017 in this video, the two ics lm3915 lm3916 are compared. The lm3916 the lm3915 is the logarithmic version of the lm3914 chip the nte1508 the nte1549 another option, the an6884 5 dot led display cpc has both the lm1916 and the lm1915. One pin changes the display from a bar graph to a moving dot display. All 3 are basically the same and all are positive voltage inputs. The lm3916 is very versatile the outputs can drive lcds vacuum fluorescents and incandescent bulbs as well as leds of any color multiple devices can be cascaded for a dot or bar mode display for increased range andor resolution useful in other applications are the linear lm3914 and the logarithmic lm3915 features y fast responding electonic vu. The lm3915 is extremely easy to apply a 1 2v fullscale meter requires only one resistor in addition to the ten leds one more resistor programs the fullscale anywhere from 1 2v to 12v independent of supply voltage led brightness is easily controlled with a single pot the lm3915 is very versatile the outputs can drive lcds. They had an lm3915 surfacemounted and a surfacemounted strip of 10 red leds. Lm3916 dotbar display driver february 1995 lm3916 dotbar display driver general description the lm3916 is a monolithic integrated circuit that senses analog voltage levels and drives ten leds, lcds or vacuum fluorescent displays, providing an electronic version of the popular vu meter. Lm3915 dotbar display driver, lm3915 datasheet, lm3915 circuit, lm3915 data sheet.
Hook them up properly, and you can create all sorts of. When used with the lm3915, the input voltage is typically from 447mv dc to light the first led to 10. Lm3915n1 led, lcd, vacuum fluorescent vf driver 18dip from texas instruments. In this video, the two ics lm3915 lm3916 are compared. Features n fast responding electronic vu meter n drivers leds, lcds, or vacuum fluorescents n bar or dot display mode externally. A simple, low cost approach to cascading two lm3915s is to set the reference voltages of the two chips 30 db apart as in. Lm3916 led bargraph vu meter pick your color from kuzyatech on tindie a breakout for the legendary lm391x bargraph drivers. Audio inputs are via two 10pin headers and outputs via four 50pin box headers. Lm3915n1 texas instruments integrated circuits ics. Lm3915 dotbar display driver experimentalists anonymous. I dont want to go the microcontroller option when it is an ic that is quite simple.
W dzisiejszych czasach stosuje sie do tego typu urzadzen, ukladu lm3915. Lm3915 1features description the lm3915 is a monolithic integrated circuit that 2 3 dbstep, 30 db range senses analog voltage levels and drives ten leds. Lm3914 applications lm3916 vu meter 20 led vu meter common cathode in audio vu peak hold vu meter circuits lm3916n lm3915 function lm3916 lm3915 pin text. In this video, the three ics lm3914 lm3915 lm3916 are compared and what will be the best to realize a vumeter. The volume units are used to calibrate a volume indicator since the volume unit is a measure of a complex audio waveform. The outputs can drive lcds, vacuum fluorescents and incandescent bulbs as well as leds of any color. The is a monolithic integrated circuit that senses analog voltage levels and drives ten. The lm3915 and lm3916 are typically used to display audio signal.
The leds are lit in 3db increments using the lm3915. A listing of sales offices and locations is included at the back of this document. A single supply as high as 25 v and as low as 3 v can. Putting effort into trying to find out that information yourself from the data sheet will be rewarded by a much greater familiarity with the ic longer term. Dotbar display driver, lm3915 datasheet, lm3915 circuit, lm3915 data sheet. However, if you want to go to 12 leds, then use two of the lm3915 drivers, as. Lm3915 led bardot driver linear ic jaycar electronics. Lm3915 vs lm3916 the best vumeters ics differences. Lm3916 vumeter steps scaled by an internal resistor divider of 1087, 970, 864, 769.
Lm3915 vs lm3916 the best vumeters ics differences and uses. Lm3914 versatility was designed into the lm3914 so that 1features controller, visual alarm, and expanded scale functions 2 drives leds, lcds or vacuum fluorescents are easily added on to the display system. Customers should contact their distributor, representatives or field application engineer fae for support and sample. A voice unit vu led meter made with an amplifier stage using lm386 and lm3915 ic chips. Pricing and availability on millions of electronic components from digikey electronics. Led current drive is regulated and programmable, eliminating the need for current. Lm3915n lm3915 dotbar led lcd nixie display driver dip18. The string for the vu meter has different values whereas the lm3914 has a linear string. The lm3914 is linear display the lm3915 is 3db increments, log display and the lm3916 is a vu meter display. Local sales offices are also available to help customers.
As i recall its been awhile if you look at the data sheet they show the internal voltage divider string. Snvs740c january 2000revised march 20 lm3915 dotbar display driver check for samples. It basically drives each adjacent led in 3db steps i. Each of these pins is connected to the cathode of the output led. Ti, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. I have a bigger project in mind and will post instructables of each piece and tie it all to. The lm3914 and lm3916 are a two ics in a series of monolithic, analogcontrolled led drivers. Lm3916 dotbar display driver components datasheet pdf data sheet free from. Today, the lm3915 and lm3916 are not made anymore and the lm3914 is available only in a tiny surfacemount package. Na trzech takich scalakach mozesz wykonac wskaznik 030v, 1v na diode. The lm3914 is very easy to apply as an analog meter circuit. May 17, 2010 the lm3916 was designed to be a 10led vu meter display driver. The lm3915 and lm3916 are typically used to display audio signal strengths using 10 leds.
Lm3914, lm3915, lm3916 differences electronics forum. Nsc, alldatasheet, datasheet, datasheet search site for electronic components and. The lm3916 was designed to be a 10led vu meter display driver. Vumeter stereo 20 led with lm3915 pcb tutorial youtube vu meter circuit page 2.
Lm3915 is a dotbar display driver which drives a series of leds based on the analog input. Uklad na uaa 170 jest super, ale nie wiem skad zdobyc. Lm3915 vs lm3916 the best vumeters ics differences and. One pin changes the display from a bar graph to a moving. Bar or dot display mode externally selectable can drive. Multiple devices can be cascaded for a dot or bar mode display for increased range andor resolution. Lm3915 datasheet, lm3915 pdf, lm3915 data sheet, datasheet, data sheet, pdf. Lm3914 datasheet pdf dotbar display driver ti, lm3914 pdf, lm3914 pinout, lm3914 data, lm3914 circuit, lm3914 ic, lm3914 schematic, lm3914 manual. Ic driver dot bar display 18dip online from elcodis, view and download lm3916n pdf datasheet, pmic display drivers specifications. Lm3914 linear steps scaled by an internal resistor divider of ten ohm resistors lm3915 3db logarithmic steps scaled by an internal resistor divider of 6630, 4690, 3310, 2340, 1660, 1170, 830, 590, 410, ohm resistors lm3916 vumeter steps scaled by an internal resistor divider of 1087, 970, 864, 769, 1298, 1031, 819, 923, 1531, 708. The led vu meter was the height of late 80s boombox technology.
Lm3915 dotbar display driver general description the lm3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten leds, lcds or vacuum fluorescent displays, providing a logarithmic 3 dbstep analog display. Here are the nsm3900 modules made by national semiconductor that i bought in the 60ies. Today, the lm3915 and lm3916 are not made anymore and the lm3914 is. Alternatively, it is possible to cascade an lm3915 with lm3914s for a loglinear display or with an lm3916 to get an extended range vu meter. Volume unit measurement with lm3915 and lm3916 circuit. The data sheet provides information on brightness levels with supply voltage and related matters. Im surprised ti havent released a replacement for the lm3915 even if the replacement was an smd package. This instructable will build one out on the breadboard. Lm3915n1 texas instruments integrated circuits ics digikey. This electronic vu meter set is a circuit that high performance and widely popular than 40 years i made a lot of amplifiers. Ic driver dot bar display 18dip online from elcodis, view and download lm3915n pdf datasheet, pmic display drivers specifications. Certainly i need to be on a scrounge to build up some stock of these until i have a simple redesign method.
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