Tuesday, October 27, 2015

How to count number of rows with specific values in excel

To count number of rows in excel with specific values use this command

=COUNTIF(rows, "psc")

Where rows = the number of rows being selected and psc = to the values in the rows for example

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Adjustable DC to DC step up voltage booster using LM2577 -Adj P+ chip

One simple circuit to step up voltage using LM2577 -Adj P+ chip. The schematic is from Texas Instrument and it works expected - and below is...