Sep 29 2014

Spectrum analyzer

Category: DVM — dq @ 7:21 PM

$119 to $289

http://rfexplorer.com/touchstone/

http://rfexplorer.com/models/

$75 or $325

http://usbspectrumanalyzer.com/purchase/

$599

https://www.signalhound.com/products/usb-tg44a/

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look for spec anal:: http://circuit-zone.com/?cat=test_and_measurement pic18f2550 (too slow)

https://www.google.com/search?hl=en&source=hp&q=PIC+based+Spectrum+Analyser+for+PC&gbv=2&oq=PIC+based+Spectrum+Analyser+for+PC&gs_l=heirloom-hp.3…1555.1555.0.2420.1.1.0.0.0.0.115.115.0j1.1.0….0…1ac.1.34.heirloom-hp..1.0.0.E8VbaXbfKlw

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Sep 29 2014

DVM – Digital Volt Meter

Category: DVM — dq @ 11:17 AM

Differential amplifier (difference amplifier) also see –> Instrumentation amplifier

http://en.wikipedia.org/wiki/Operational_amplifier_applications

above found via ::: https://www.google.com/search?q=voltage+difference+circuit&hl=en&gbv=2&oq=&gs_l=

Next search should be ::: https://www.google.com/search?q=Instrumentation+amplifier+circut&hl=en&gbv=2&oq=&gs_l=

http://www.ti.com/lit/ds/symlink/ina128.pdf

http://www.analog.com/static/imported-files/design_handbooks/5812756674312778737Complete_In_Amp.pdf

http://www.ecircuitcenter.com/Circuits/instamp1/instamp1.htm

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https://www.google.com/search?q=pic+dvm+circuit+bipolar&rls=com.microsoft:en-us:IE-SearchBox&oe=&gws_rd=ssl&hl=en&sa=X&as_q=&spell=1&ei=T7ApVKWmLYT1yASwi4HYBA&ved=0CBEQBSgA

http://circuit-zone.com/?cat=test_and_measurement

http://embedded-lab.com/blog/?p=396

http://mcs.uwsuper.edu/sb/Electronics/Vmeter/

http://www.electronics-lab.com/blog/?p=17123

http://mcs.uwsuper.edu/sb/Electronics/Vmeter/