Recent content by don rigby

oops,thought you asked the origional question (dual opamp). made a mistake. thought the person asking the origional question was correcting you.(when all the while you were chastizing me) tried a more basic aproach, obviously it did not appeal. by all means, take the time to pick apart my...

we know from ohms law that: e=i times r when we consider inductors in circuits with frequencies we substitute r with xc (inductive reactance). the formula is: Xl (inductive reactance)=2 * pie *f (freq.) * L the only way "the magnetic flux in a magnetic circuit composed of different magnetic...

[edited] That's a-r-r-o-g-a-n-c-e... and I'm not sure why the thread warrants it. Please be civil. -Russ

then why did you ask the question? are you sure what he said was wrong? some people think and explain above other's comprehension. prove him wrong, i dare you! i, and others will correct, and be humbly corrected. that is my reason for putting time in here, LEARN and refresh.

learn your theory, then pretend you are: an electron and/ or voltage, and/ or current, and/ or resistance, and/ or reactance, and/ or power, and/ or a magnetic field... and see how you would, in this state, act in the circuit (given theoretical and practical limitations).(wow, two original...

bandgap= ? are you talking about ttl vs mos?

the answer is 0. if you disagree please, give more details. where? let's say on any kind of conditions

take it slow, focus on the reasoning for the teachings (they are all simple concepts, and yet we all dump them from memory too fast!). it all adds up to a bigger picture eventually. the few things i actually really, and honestly know are the following; 1/ knowledge is a function of ambition...

where do you want to measure eddy currents?

"ok- we are at the lower end of the transistors conductivity range at .7 volts base over emitter, now we apply .72volts the light bulb lights dimly, .73 volts brighter..." *****sorry, this is wrong and should read : ok- we are at the lower end of the transistors conductivity range at .7 volts...

ok the question I have is why is the voltage between the 220 olm resistor and the 330 olm resistor 0 V. be careful how you word your question! the answer to this question is that you are measuring the voltage on a 0 ohm conductor between r220 & r330

think of it this way: a transistor is very much like a light switch, except it can also vary the amount of light.(considering a bulb load, think speaker, think amplifier, think transmitter...).with regards to a standard pnp or npn doped transistor, we have to provide at least .7 volts more to...

a logic cct is not required. you are simply using a switch to make and break a magnet (on one wall?). *** magnet energizes- moves to wall- switch opens- magnet de energizes and swings away from wall- switch closes- magnet energizes-...

not: let's say, you have a float in your basement that is nc (normally closed, like a light switch turned on, when not under water). you want to use this float for an alarm. if you wire this float directly to the alarm panel it will be on when the basement is dry! therefore we reverse the...

what you are hearing is 60 hz hum probably due to bad capacitors in your amp. proof: put your speakers on another system and see if it goes away. double check by putting proven speakers on your system.