3904 transistor calculator software

The maximum current a 3904 can handle is 100ma, so is it okay too choose a resistor for a 100ma current so anything i hook up will work as long as it takes less than 100ma. In this animated activity, learners view the seven steps that are used to calculate voltage and current values throughout a commonemitter transistor amplifier. Npn transistor tutorial the bipolar npn transistor. Semiconductor 2n3904 technical data feature npn silicon epitaxial planar transistor for switching and to92 amplifier applications as complementary type, the pnp transistor 2n3906 is recommended 1. So say if the transistor has a gain of 50 not sure what the 3904 has, and i want 100ma. On the other pins its possible to set only lowhigh values under 128 are translated to the low. Bjt bipolar junction transistor calculators these calctown calculators calculate the important relations for bjts bipolar junction transistor and analyse various configurations ce common emitter cc common collector cb common base circuit configurations in. Download npn dcbias calc voltage divider bias npn bipolar. But is this at 100% duty cycle or does the duty cycle not. Led seriesparallel array wizard the led seriesparallel array wizard is a calculator that will help you design large arrays of leds. One of our members talks about using beta in the calculation for the value of the base resistor for the switching transistor. Calculator vbe vce hfe first you must check the datasheet of the transistor in question and identify the values vbe, vce, and hfe.

As you understand, those calculators are far from complete. It is one of the lowestcost general purpose transistors currently available on the market, and compares well with the bc range of npn transistors. In the previous tutorial we saw that the standard bipolar transistor or bjt, comes in two basic forms. The humble transistor q1 emitter e collector c base b transistor basics emitter to base junction is forward biased normally collector to base junction is reverse biased normally transistors are current operated devices, so. Q11 is a common collector and q12 is a common emitter. Jun 15, 2019 the transistor 2n3904 comes under the category of npn small signal, low power, general purpose transistor, mainly applicable for switching and for signal amplification. We also learnt that the junctions of the bipolar transistor can be biased in one of three different ways. Marking package code 2n3904 2n3904 to92 outline dimensions unit. With transistoramp you are able to create your individual transistor amplifier with a few mouse clicks. Vbe increases with base current, decreases with temperature, and increases with collector current. The base current must simply be 110th the collector current for the 2n3904 transistor and for most other transistors. I am building a project involving 96 leds, an atmega328, a few 2n3904 transistors and a few other bits, to create a programmable led light pattern generator. The list is from time to time enriched with new scripts.

The 2n3904 is a common npn bipolar junction transistor used for generalpurpose lowpower amplifying or switching applications. Im looking for a smt npn transistor about the equivalent of the 2n3904, say in a sot23 package or similar. Calculating dc values of a transistor amplifier by terry bartelt. The beta and vd transistor parameters, can be measured, or gathered from a data sheet. Data entry is on the left, a representative schematic is in the middle and results are on the right two areas. Base resistence needed to drive transistor into saturation. Top 4 download periodically updates software information of transistor full versions from the publishers, but some information may be slightly outofdate using warez version, crack, warez passwords, patches, serial numbers, registration codes, key generator, pirate key, keymaker or keygen for transistor license key is illegal. Its dynamic range may include a current handling capability of more than 100ma for switching applications and a 100mhz frequency handling capacity fits with amplification purposes. Design your own bipolar transistor amplifier quick and. Dec 23, 2008 blog entry using transistor as a switch december 23, 2008 by rwb, under electronics most of microcontrollers work within 5 volt environment and the io port can only handle current up to 20ma. The schematic illustrates some of the voltage measuring points on the transistor schematic. This transistor simulator calculator is used to calculate the collector and emitter voltage, base current, emitter current, power and collector current using the given inputs. The guaranteed minimum value is given because the actual value varies from transistor to transistor even for those of the same type.

Since the 2n3904 is an npn transistor, that means the base needs positive biasing appropriate voltage levels and resistance to turn on the collector emitter junction for proper current flow. When the transistor is not saturated, then the base current and collector current are related by this factor. This transistor is also available in a throughthehole to92 bulk, and ammopack versions. You can pass your mouse or click on it over the blue underlined text in the calculator to obtain more information about that area. Pricing and availability on millions of electronic components from digikey electronics. Transistor software specializes in the background operation of native location apis for ios and android in locationtracking applications.

A simple single transistor amplifier dramatically improves audio output of projects. Without this base current, the transistor cant turn on. The transistor 2n3904 comes under the category of npn small signal, low power, general purpose transistor, mainly applicable for switching and for signal amplification. An example of an audio amplifier stage using basebiasing is crystal radio with one transistor. How to calculate the base current, i b, of a transistor.

And it all depends on what information is already known about the transistor. These values are responsible for enabling transistor. Bjt bipolar junction transistor calculators online bjt. Transistor 2n3904 pinout and specifications homemade. In order to use this calculator, you will need to know the input switching. Note that current gain is just a number so it has no units. These transistors help to form the input differential stage of the amplifier.

An npn n egative p ositive n egative type and a pnp the most commonly used transistor configuration is the npn transistor. Ive had a little project on the back burner for some time ive been meaning to write up a whole bunch of little useful electronics calculators not just like the little ones you see scattered around that are no more convenient than a pocket calculator. Transistoramp runs under windows 2000, windows xp, windows vista, windows 7, windows 8, windows 8. It is designed for low current and power, medium voltage, and can operate at moderately high speeds. The user can alter the vcc, vbe, transistor beta and any of four resistor values r1, r2, rc and re by picking the transistor value from a standardvalue resistor table or manually entering the value. Apr 11, 2009 the maximum current a 3904 can handle is 100ma, so is it okay too choose a resistor for a 100ma current so anything i hook up will work as long as it takes less than 100ma. Npn silicon transistor descriptions general small signal application switching application features low collector saturation voltage collector output capacitance complementary pair with 2n3906 ordering information type no. Download transistoramp software for the design of transistor. The analogwrite works only on pwm pins in your scheme its marked by. Here is a link that shows various package sizes for 3904 transistors. Bjt transistor bias voltage calculator calculates for.

Transistor amplifier circuit designer software electronic. There are several ways to find the base current, ib, of a transistor. Whatever the textbook says is the correct value for a small signal transistor, know that these things always come with a range of values. Our default conditions are calculated on loading of the calculator but can be changed and recalculated. Led series resistor calculator these calculators work out the values for an led current limiting resistor. Normally im a software guy, but i am trying to create a really cheap design for my dads model train club. Transistor codes surface mount, pnp, npn, choosing. Blog entry using transistor as a switch december 23, 2008 by rwb, under electronics most of microcontrollers work within 5 volt environment and the io port can only handle current up to 20ma. Transistor simulator calculator, voltage and current. I was poking around and found that there is a voltage drop of about.

Small case h fe represents the smallsignal current gain or ac gain, and we do not use this parameter when using the transistor as a switch. Jul 20, 2010 i am building a project involving 96 leds, an atmega328, a few 2n3904 transistors and a few other bits, to create a programmable led light pattern generator. With transistoramp software you are able to create your individual bipolar transistor amplifier with a few mouse clicks. When selecting the h fe value for transistor switching purposes we. Theyre critical as a control source in just about every modern circuit. Transistor 2n3904 bipolar bjt npn general purpose pack. For the design of transistor amplifiers there is a new software available. The 2n3904 is a small signal generalpurpose npn transistor. A bipolar junction transistor is a solidstate device in which the current flow between two terminals the collector and the emitter is controlled by the amount of. Collector current would naturally be dependent on the load being driven. Not to mention weirdly used npn with leds as negative feedback. Transistoramp bjt transistor amplifier circuits designer software. It actually varies by a wide margin even between specimens of the same part number, so the approach is to anticipate a gain that is surely less than the gain you will get so that you.

V be base emitter voltage v rb base resistor base resistance. The following calculators, will compute all of the bias values of the transistor circuit, given the supply voltage, and the base voltage, and all of the resistor values. Ive been saving my used batteries in a box for recycle and now im taking it out and use the remaining voltage to light a 10mm led as my night light in my room,livingroom,kitchen,hallways and lights in the bathroom so my kids dont have to turn on the light at night when they do no. A bipolar junction transistor bjt was invented in december 1947 at the bell telephone laboratories by john bardeen and walter brattain under the direction of william shockley. The original in a to92 package looks to go for under 10c in 1k volumes, which would be rather nice. Transistoramp runs under windows 2000, windows xp, windows vista, windows 7. The beta and vd transistor parameters, can be measured, or. I am instead going to switch on my ps2 with a transistor. Use the standard resistor values chart to find the nearest standard resistor value. The base current, ib, of a transistor is a crucial current of a bipolar junction transistor. This pair of transistors will buffer the signal from q3s collector, and provide a high gain as the signal goes to the final stage. I would need more than my life to script a complete list of calculators. The usual way is connect the emmiter to the ground and base is driven over current limiting resistor. Im building a spreadsheet to calculate the base resistor value to be used when employing a transistor as a switch.

This software is freeware and may be used commercially and privately for free. Transistor switch saturation calculator electronic products. The simplest biasing applies a basebias resistor between the base and a base battery vbb. Transistor software free download transistor top 4. Npn switching transistor mmbt3904 limiting values in accordance with the absolute maximum rating system iec 604. Now the base current is obtained by dividing ic by the hfe. In case you badly need a calculator, you may ask from us with email of course and you will have it the soonest possible. Vbe of 2n3904 in led driver circuit electronics forums. Led series resistor calculator current limiting resistor calculator for leds. In this tutorial well introduce you to the basics of the most common transistor around.