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Help with analog oscilloscope ?
Ive gotta hameg hm 203-7 oscope and have been scratching my head reading the manuel trying to do the following but been unsuccessful.When the oscope triggers on a ac voltage going above a set threshold voltage which could occur randomly at any time i want the...
Thx for taking the time to post those links.Which in your opion is the better out of the Hamegs you posted for reliability/value for money/performance etc ?
Ive been learning about electronics for 2 years as a on/off hobby just started really dabbing about with opamps,filters etc i need a cheap but good easy to use oscope for a beginner to experiment and learn from ive been looking in the uk espically ebay but am lost in which one to go for.My...
Okay so if i find out that a device is on for 50ms and off for 50ms thats 10hz 50% duty i think and then calculated the power when it is on 100% duty by VxI to be 1 watt is the power dissipated simply 500mw and how does this change if the frequency is changed from 10hz to 100hz,1khz,10khz etc ?
If i was switching a load on and off which uses less power 50 % duty at 10khz or 50 %at 1khz ?
How is power dissipation calculated when pwm is involved ?
Ive got this non inverting opamp circuit set up on a breadboard using r1(10k) and r2(100k) i set the gain to 11 however im getting a strange output for the following non invert input voltage.
Noninverting voltage 27mv
voltage at the output 4.2v
Noninverting voltage 100mv
voltage at...
When you see on line places like radio***** selling transistors and saying this transistor has a gain of 300 hFe what is this value useful for operating the transistor as a switch or amplifier ?
If transistor hFe reduces as IC increases what mode of operation would a transistor be in to...
Okay so use 10 hFe for the ib when using transistor as switch i understand !
If every transistor even the same part number have a different hFe values then what are the hFe values in a transistor data sheet useful for ?
Does the 1/10th base current rule still stand for a Darlington transistor...
Ive got some basic questions about how to interpret data from a transistor data sheet basically when there is no graph to look at to get data from only a select list of x and y data points in a list.
Take for example a 2n2222 npn transistor it says in the data sheet
vbe(sat) at Ic = 150ma,IB...
Couple of questions:
Are most transistor amplifier circuits dc coupled with ac in and out resulting in amplification on the ac signal on the output ?
Would you say that dc only transistor configurations mainly are used to operate as a switch and not in the linear active region ?
What sort of applications would a dc only transistor amplifier be used ?
Whats the advantage of using a opamp to amplify an ac microphone signal vs a transistor amplifier that does the same thing?
Are transistor amplifier configurations mainly used in electronics for amplifying an ac signal so that it changes phase or amplitude on the output?
Also are transistor amplifiers used much for dc only in active region mode (not being used as a typical switch) ?
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