Category Archives: Electronics

Clock Project Links

Posted on March 28, 2011 by admin

counter datasheet with circuit to use a 32.768Khz crystal: http://www.datasheetcatalog.org/datasheets/90/109006_DS.pdf interfacing to a 7-segment decoder: http://www.thelearningpit.com/lp/doc/7seg/7seg.html 4511 datasheet: http://www.datasheetcatalog.org/datasheet/philips/HEF4511BN.pdf  

Posted in Electronics | Leave a comment

555 Timer LED Blinking Circuits Part 1

Posted on January 1, 2011 by admin

       

Posted in 555 Timer, Electronics | Leave a comment

Adjustable 555 Timer Based PWM Circuit

Posted on January 1, 2011 by admin

A 555 timer is used to control the speed of a DC motor with pulse width modulation. A potentiometer controls the rate at which the timing capacitor charges and discharges which alters the duty cycle. This circuit is based on … Continue reading →

Posted in 555 Timer, Electronics | Tagged | Leave a comment

Non-Adjustable 555 Timer Based PWM Circuit

Posted on January 1, 2011 by admin

A two-part video series covering how to use a 555 timer to control an electric motor with pulse width modulation. The circuit covered has a fixed duty cycle, but is expanded upon in the video attached to Adjustable 555 Timer … Continue reading →

Posted in 555 Timer, Electronics | Leave a comment

555 Timer Monostable Mode

Posted on January 1, 2011 by admin

The video below discusses how to setup a 555 timer for monostable operation. The timing can be altered by substituting a different R1 resistor and/or C1 capacitor. The following equation will tell you how long output pin will stay in … Continue reading →

Posted in 555 Timer, Electronics | Leave a comment