Timeline for Transistor saturates no matter the size of base resistor
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
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| Jul 21, 2014 at 6:16 | history | tweeted | twitter.com/#!/StackElectronix/status/491104415081058304 | ||
| Jul 20, 2014 at 23:49 | comment | added | wbeaty | DVM= digital voltmeter. And voltage-control of BJTs, that's if you want to know the physics behind them, lift the hood and learn how BJTs work inside. For most design tasks you want a simplified model which conceals the physics: close the hood, ignore the engine internals, and just drive. | |
| Jul 20, 2014 at 20:44 | vote | accept | Attaque | ||
| Jul 20, 2014 at 18:30 | comment | added | Spehro 'speff' Pefhany | @fuzzyhair2 Yes, there is some merit to that view, but it's not so useful an approach for switching circuits. | |
| Jul 20, 2014 at 18:19 | comment | added | fuzzyhair2 | Apparently a transistor is a voltage-controlled device. From: "How Does A Transistor Work? No, How Do They Really Work?" amasci.com/amateur/transis.html | |
| Jul 20, 2014 at 18:05 | answer | added | WhatRoughBeast | timeline score: 0 | |
| Jul 20, 2014 at 17:28 | comment | added | Attaque | I'm sorry, a DVM? | |
| Jul 20, 2014 at 16:53 | comment | added | user16324 | Saturation is usually defined in a datasheet as the point where Vce <= 0.2V for your load current. So use a DVM to determine that voltage and find the Rb at which it happens to be 0.2V. As the answers say, that's a very different thing from when the transistor is on etough to light the LED. | |
| Jul 20, 2014 at 16:46 | answer | added | Spehro 'speff' Pefhany | timeline score: 4 | |
| Jul 20, 2014 at 16:43 | answer | added | sherrellbc | timeline score: 1 | |
| Jul 20, 2014 at 16:38 | comment | added | Attaque | I pull the arduino pin high and the LED turns on | |
| Jul 20, 2014 at 16:30 | comment | added | sherrellbc | How are you determining the transistor is saturating | |
| Jul 20, 2014 at 16:23 | history | asked | Attaque | CC BY-SA 3.0 |