Design Center
Design Ideas
Convert negative inputs to positive outputs 4/23/2009
Create a 3.3V source from a –5V supply.Shunt regulator monitors battery voltage 9/18/2008
A shunt regulator and a handful of associated components function as a battery monitor.Touch-activated timer switch extends battery life 7/10/2008
Designed to fit into the battery compartment of an optical mouse, this circuit automatically shuts off the battery after a time delay.Tester cycles system-power supplies 7/10/2008
A simple two-relay circuit cycles system power on and off to test a design on the benchtop.Microcontroller controls analog phase shifter 6/12/2008
By using a digital potentiometer in a phase-shift circuit, a microcontroller can precisely control phase shift.Programmable current source requires no power supply 6/12/2008
A programmable current source is useful for creating I-V curves, charging and discharging batteries, preloading power supplies, and many other applications.Small capacitor supports telecom power supply during brownouts 5/15/2008
By using a charge pump, the energy stored in a small capacitor can support the operation of a "brick" telecom power supply during brownouts.Retriggerable monostable multivibrator quickly discharges power-supply capacitor 3/20/2008
A simple circuit consisting of a one-shot and a power MOSFET discharges the filter capacitor of a mains-powered power supply.Harvest energy using a piezoelectric buzzer 3/20/2008
You can harvest small amounts of mechanical energy using a piezoelectric buzzer to charge a supercapacitor.Precision voltage-controlled current sink tests power supplies 3/20/2008
A simple voltage-driven current sink allow you to test the dynamic behavior of power supplies.ADVERTISEMENT
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