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aniruddha
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Please tell me whats a "STEPPER MOTOR" ?
Does it also have part numbers or variants?
Whats the approximate cost?
Thanks in advance. -
Hi everyone,
I have a few conceptual probs. pls hlp.
1- What is the constructional difference between polar and non-polar capacitors?
2- What is the operational(functional) difference between polar and non-polar capacitors?
3- If a polar capacitor is connected with opposite polarities will it act like a diode?
4- Also are there any different theory/formulae/laws governing polar capacitors or they are same as those for non-polar capacitors?
5- Also pls give details on polystrene (excuse the spelling mistake) and electrolytic capacitors. -
hmm.. well i didn't suggest a LM3915 because... I didn't know about it ...
he he he -
If the size of ckt is quite large then the effect of stray capacitances and inductances could be reduced by
1- Twisting the connecting wires.
2- Connecting a very small (about 1pF) capacitance in parallel close to the IC pin. -
Hmmm....
do you mean something similar to those different colour LEDs that glow depending on frequency outputs and the number of LEDs of a particular colour glow depending on amplitude of output of that frequency?
Well say you've got an option of 5 colours ... R/O/Y/G/B.
You could use band pass ckts with different BW depending on frequency zones.
eg. 300hz-700hz, 700hz-1.3khz, 1.3khz-2.1khz, 2.1khz-2.9khz, 2.9khz-3.4khz
Now the no. of LEDs connected down the ckt. after the BP filters will glow depending on the amplitude of filter output. You could use an ADC say ICL-7109 or just a ladder of comparators (of course this is bulky & costly but simpler to build) LM 339 would be perfect with inverting inputs receiving reference vtg levels from a resistor ladder (acting as vtg. divider). All the non-inverting inputs be connected to the filter output. Further the comparator outputs are connected to different LEDs of same colour. -
you said:="I need an automatic pot. If I could somehow start with lots of resistance that decreases after power is given then I would be set !
"
What about using an inductor? You could also connect a tiny resistance in series. ;) Just trying to give a suggestion. ;D -
From the last post it appears that u just want a DAC ckt using passive components like resistors... if thats right i could suggest the foll. 3 methods:
1-Binary weighted resistor D/A Converter
2-R/2R Ladder D/A Convertor
3-Inverted R/2R Ladder Convertor
...the above ckts. do require an amplifier as the methods need a current to voltage converter at output. ;D -
hi ashray, i m a newbie too and actually this is my first post so excuse me if theres any mistake ;D
I read a book on D/A--A/D convertors ... but in the book 0808/0809 monolithic CMOS devices were mentioned as Analog to Digital convertors so is that what u meant?
Polar Capacitor as a Diode?
in Theory articles
Posted
Aww... come on guys please help me :'(
Atleast with the first three??