Friday, March 06, 2009

EEM - Electronic Engineers Component Search

EEM - Electronic Engineers Component Search

EEM - Electronic Engineers Component Search
"EEM.com is an online resource to FIND, EVALUATE and BUY electronic components. The searches on EEM.com will take you to Manufacturers and their products, Distributor Inventories..."

Application Reference Materials

Search for reference designs, application notes, design kits and more from manufacturers and distributors.

Electrostatics Society of America - ESA

Electrostatics Society of America - ESA

"The ESA is a nonprofit professional society founded in 1970 that is devoted to the advancement and improved understanding of electrostatics....

The ESA has a rich and interesting history which highlights the accomplishments of many of the pioneers in Electrostatics over the past half-century."

Joint ESA/IEEE-IAS/IEJ/SFE Conference: June 15-19, 2009 - Boston, MA

Measuring Circuits by Rudolf F Graf

Measuring Circuits by Rudolf F GrafThis series of circuits provides designers with a quick source for measuring circuits. Why waste time paging through huge encyclopedias when you can choose the topic you need and select any of the specialized circuits sorted by application?

This book in the series has 250-300 practical, ready-to-use circuit designs, with schematics and brief explanations of circuit operation.

Measuring Circuits by Rudolf F. Graf


Thursday, March 05, 2009

CD4060 Binary Counter Divider Oscillator

The CD4020BC, CD4060BC are 14-stage ripple carry binary counters, and the CD4040BC is a 12-stage ripple carry binary counter. The counters are advanced one count on the negative transition of each clock pulse. The counters are reset to the zero state by a logical "1" at the reset input independent of clock.

CD4040BC, 12-Stage Ripple Carry Binary Counters
CD4060BC, 14-Stage Ripple Carry Binary Counters


CD4060 - 14-Stage Ripple Carry Binary Counters
you can also use a crystal between pin 10 and 11 with two caps 22pF from 10, 11 to gnd and a 10M resistor between 10 and 11 in place of R C network for more precision.