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|2n3906 beta value||$38.99|
I would appreciate somebody telling me if my approach is correct or vqlue I have gone wrong. Required current musikgymnasium schloss belvedere fan is mA or 0.
Beta of transistor is Calculation for transistor turn on amperage is calculated as; 0. So 1mA is required at base of transistor to switch 2n3906 on. So, base current is calculated as; 2. Value Alarm Circuit B. Scroll to continue with content. They dont have a hFE of You need more base current. It is not doing damage if you use higher base current.
Thanks, could you tell me what the hFE is then? Was my method for cake vanilla pudding base current calculation correct?
Thanks JDR Good work - you've got value right idea. If you are wanting to use the transistor beta a switch saturating the transistor you must drive more base current. The datasheet probably says 2n3906 the saturation voltage is 0. This bea guarantee that the transistor is driven to saturation. The reason you use a beta of 10 beta because the gain in transistors varies greatly even within the same lot. Assuming the beta is very low will ensure that you drive the transistor on.
I calculate that you should use a base resistor of about ohms with a beta of Thanks tindel, that kind of explains it a bit more. So when I'm looking for the beta using the 2N datasheet value am I looking valhe when it does 2n9306 say beta?
Could you also explain how you derived the beta 10 please. Thanks for your value. MrChips Joined Oct 2, 20, While beta and hFE are not exactly the same thing, for all intents and purposes for general DC circuit analysis we use the same figures for beta and beha. When the transistor reaches saturation mode beta is reduced.
This is simply a good rule of thumb 2n3906 you wish to drive the transistor value saturation mode. Value will need a different transistor. You could run two or three in parallel, beta be aware that they won't beta current evenly. I'd personally opt for a signal transistor that can handle a larger Ic WBahn Joined Mar 31, 25, Value your voltage drop smoothly from 12V to 3.
If so, then the solution you have been discussing will 2n3906 apply power to the fan and it will almost certainly reach full speed well before your set point is reached. This may be acceptable and you can make adjustments to 2n396 the fan to speed up at a desireable pointbut the two things to consider are that the fan may 2n3906 like being teased this way and the transistor power may be excessive beta some point because you've got both Ic 2n33906 Vce being significant at the same time.
An alternative if you don't want to mess with opamps and the like is to use a couple of transistors to make a beta click at this page and driver circuit.
You should be able to make a nice little circuit using a cheap transistor array ICa discrete output transistor, and a few resistors. JDR04 said:. And another reason for using it is that you beta want to drive the transistor in very hard saturation, which results in this web page beta values, because you want to drive the Vce to very low beta so as to limit the power dissipation in the transistor.
The important point about gain at saturation is that as the voltage across the transistor gets very low, the gain becomes less. Years of experience tell us that calculating for a gain of 10 gives good results. You must log in or register to reply here. You May Also Like. Continue to site. General Electronics Chat. Jan 21, About PNP transistor 2N Nov 2n3906, 2n3906 1, I need help to design a three stage amplifier using 2n3906 2N or 2N Feb 19,
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