Measuring Resistance 0 -100 Ohm
Measuring Resistance 0 -100 Ohm
(OP)
I'm trying to design a circuit to measure a resistive probe which has a range from 0 - 90 ohms and provide a linear readout via LEDs. Any suggestions?
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Measuring Resistance 0 -100 Ohm
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RE: Measuring Resistance 0 -100 Ohm
RE: Measuring Resistance 0 -100 Ohm
absolute error, not % !)
<nbucska@pcperipherals.com>
RE: Measuring Resistance 0 -100 Ohm
RE: Measuring Resistance 0 -100 Ohm
RE: Measuring Resistance 0 -100 Ohm
RE: Measuring Resistance 0 -100 Ohm
if you want a reading from 0 to 100 with how many decimals ?
RE: Measuring Resistance 0 -100 Ohm
I really don't want numeric display. It will just be a row of 10 LEDS.
RE: Measuring Resistance 0 -100 Ohm
<nbucska@pcperipherals.com>
RE: Measuring Resistance 0 -100 Ohm
seems simpler than a microcontroller to me, but I prefer solder to software.
RE: Measuring Resistance 0 -100 Ohm
national semiconductor's LM3915:
The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs, LCDs or vacuum fluorescent displays, providing a logarithmic 3 dB/step analog display. One pin changes the display from a bar graph to a moving dot display. LED current drive is regulated and programmable, eliminating the need for current limiting resistors. The whole display system can operate from a single supply as low as 3V or as high as 25V.
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ok now go and enjoy from this IC.
here is it's datasheet:
http://www.national.com/ds/LM/LM3915.pdf