Username mrobbins
Name Mike Robbins
E-mail
Member Since September 23, 2011

mrobbins's Public Circuits:

Now showing circuits 41-60 of 75. Sort by

Digital Input Hysteresis ("Schmitt Trigger" behavior)

Digital Input Hysteresis ("Schmitt Trigger" behavior) PUBLIC

All digital element inputs in CircuitLab currently show hysteresis effects (VIL=2.0, VIH=3.0).

by mrobbins | updated March 22, 2012

digital   hysteresis   schmitt-trigger  

Diode Reverse Recovery Time Demo

Diode Reverse Recovery Time Demo PUBLIC

Diodes have a "reverse recovery time". When switched from on to off, the space charge within the semiconductor must return to its original location. The diode appears to conduct briefly in reverse.

by mrobbins | updated March 20, 2012

diode   flyback   switching  

Diode tester

Diode tester PUBLIC

by mrobbins | updated March 19, 2012

diode  

Copy of jpeg2600's "p. 287 #43"

Copy of jpeg2600's "p. 287 #43" PUBLIC

Demo of graphically solving a KCL/KVL/resistor problem using parameter sweep.

by mrobbins | updated March 16, 2012

CircuitLab as an In-Browser Graphing Calculator

CircuitLab as an In-Browser Graphing Calculator PUBLIC

CircuitLab's graphing and expression evaluation abilities make it possible to use as a general-purpose in-browser graphing calculator.

by mrobbins | updated March 14, 2012

Loop of voltage sources

Loop of voltage sources PUBLIC

Loops of ideal voltage sources can cause simulator issues.

by mrobbins | updated March 10, 2012

TL431-like shunt voltage regulator

TL431-like shunt voltage regulator PUBLIC

BJT, op-amp, and internal reference voltage source make a model of a shunt voltage regulator

by mrobbins | updated March 06, 2012

bjt   op-amp   voltage-regulator  

LED / photodiode with optical connection by CCCS

LED / photodiode with optical connection by CCCS PUBLIC

A CCCS (Current Controlled Current Source) can be used to simulate the optical coupling between an LED and photodiode.

by mrobbins | updated March 01, 2012

led   optical   photodiode  

Copy of danielfiction's 555 motor controller ($0.50!)

Copy of danielfiction's 555 motor controller ($0.50!) PUBLIC

Build a PWM motor controller for $0.50! Based on danielfiction's circuit (link inside).

by mrobbins | updated March 01, 2012

555   bjt   motor   pwm  

Forcing initial capacitor voltage = 0

Forcing initial capacitor voltage = 0 PUBLIC

A time-controlled switch can be used to force a capacitor to start discharged.

by mrobbins | updated March 01, 2012

initial-conditions  

AC Power Supply (Transformer and Bridge Rectifier)

AC Power Supply (Transformer and Bridge Rectifier) PUBLIC

by mrobbins | updated February 04, 2012

bridge-rectifier   transformer  

BJT difference amp

BJT difference amp PUBLIC

by mrobbins | updated February 04, 2012

amplifier   bjt  

H-bridge

H-bridge PUBLIC

by mrobbins | updated February 04, 2012

diode   flyback   inductive   level-shift   mosfet   motor   power  

Diode cascade voltage multiplier

Diode cascade voltage multiplier PUBLIC

by mrobbins | updated February 03, 2012

diode  

555 as Pulse Width Modulation (PWM) generator

555 as Pulse Width Modulation (PWM) generator PUBLIC

555 timer as a PWM generator based on an analog input source.

by mrobbins | updated January 24, 2012

555   pwm  

555 as astable (oscillator)

555 as astable (oscillator) PUBLIC

555 timer as a square wave oscillator (astable mode)

by mrobbins | updated January 24, 2012

555   oscillator   time-constant  

RC Low-pass Filter

RC Low-pass Filter PUBLIC

by mrobbins | updated January 08, 2012

Unicodful circuit name?euro:€ japanese:日本語 résumé

Unicodful circuit name?euro:€ japanese:日本語 résumé PUBLIC

résumé 日本語

by mrobbins | updated December 24, 2011

Two-Zener voltage clamp

Two-Zener voltage clamp PUBLIC

Two back-to-back zener diodes can be used to limit the voltage excursion of a signal.

by mrobbins | updated December 08, 2011

Op-amp Slew Rate Demo

Op-amp Slew Rate Demo PUBLIC

Demonstrates the limited slew rate of a real op-amp with a large square wave input.

by mrobbins | updated November 28, 2011