(AN-31) Over Voltage Protection on AC Adapter Input:  Application Note Microsemi 1314 (added 05/07)

Active Power Zener:  (electronic Circuit / Schematic  (added 02/05)

Add-On Current Limiter by Ron J:  This circuit allows you to set a limit on  maximum output current available from your PSU. It's very useful when you power-up a project for  first time or carry out a soak-test. By setting an upper limit on  current available from your PSU you can protect both your power supply and any device connected to it. (added 10/05)

Add-on Current Limiter:  With buzzer (circuit added 11/06)

Application Note 32:  Micrel Application Note Dual Current-Limiting Switch for USB Applications (app note added 6/06)

Circuit Forms High Frequency Polarity Clamp:  04/11/02 EDN Design Ideas  /  (added 1/05)  You need a negative signal clamp to protect an ADC against negative-going signals while measuring the positive pulse shape of the signal by digitizing the waveform. In other words, you must clamp negative signals at 0V. The circuit in Figure 1 can clamp either positive or negative pulses to ground. ...

Compressor using photoresistor:  This design has a few things that make it stand out as a typical beginner's design, but I remember it worked amazingly well. I plugged an electric bass into it and I could pluck a string, put down the bass, and walk away and come back 15 minutes later with the note still playing. Finger and fret noises jumped out while hard-played notes  were crushed into submission.... (circuit design added 11/06)

Current Limiting Power Supply:  This is a 1-amp variable-voltage PSU. It adjusts from about 3v to 24v: and has the added feature that you can limit the maximum output current. This is invaluable when (for example) you power-up a project for the first time or soak-test a piece of equipment. added 10/05)

Current-limit switch is digitally Programmable:  08/17/00 EDN-Design Ideas  / (added 2/06)    

Current-Limited DC/DC Converter Simplifies USB Power Supplies:  DN252  Design Notes (Linear Technology) (app note added 2/06)

Dual Limit Window Comparator :  Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note added 6/06)

Hiccup Mode Current Limiting (AN-8):  Application Note 8 from Microsem  (app note added 6/06)

Inrush Limiter also Provides Short Circuit Protection:  06/09/05 EDN Design Ideas  / (added 6/06)  MOSFET keeps inrush currents due to capacitive loads under control.

L200 PSU:  easy to power supply with1-single L200 IC, offers a variable current limit of up to2 A, as well as voltage regulation  (added 10/05)

Morgan Compressor/Limiter:  (electronic schematic / circuit added 4/02)

Over Voltage Protection for LM317:  It is a voltage regulator that allows a 6v portable supply to be derived from the 12v car battery. You can add a 6.2V zener diode and a LED to warn you when the input supply is overvoltage. If you could find a relay that would operate from 6.2v right up to 12v that you could connect in such a way that if over voltage occurred, then the relay would automatically switch off the output preventing damage to any connected equipment. Such a relay would be quite difficult to find, so I designed this, it is a simple two transistor circuit which will switch off the output should the voltage raise above 6.2v (this can be changed by selecting a different value of zener diode )....  (added 10/05)

Over Voltage Protection on AC Adapter Input (AN-31):  Application Note 31 from Microsem  (app note added 6/06)

Passive circuit limits inrush Current:  09/26/02 EDN Design Ideas  /  (added 1/05)  You would normally limit the inrush current during start-up of a rectifier circuit with a capacitor output filter by using the circuit in Figure 1. You insert a high resistance in series with the ac input or the dc output of the rectifier and then short-circuit the resistance with a switch once the filter capacitor is sufficiently charged....

Soft limiter for oscillator circuits uses emitter-degenerated differential pair:  10/12/2006    EDN Design Ideas  / (added 05/07)    Phase-shift network plus a few active components yields low-distortion output.

Stereo Broadcast Limiter:  Circuit for the Ramsey FM10a/FM25 Transmitter (added 5/02)