Design Center
Design Ideas
Fader switch uses inexpensive controller 11/12/2009
Control the brightness of an LED or incandescent lamp.Use two phases to cut current and improve EMI 11/12/2009
A two-phase SEPIC has lower output-capacitor current, which also improves reliability.ADC for programmable logic uses one capacitor 11/12/2009
Use a capacitor's charging and discharging time to sense a user input.Negative-to-negative switch-mode converter offers high current and high efficiency 11/12/2009
Don't let variations in input voltage affect the output voltage.Dual-coil relay driver uses only two MOSFETs 10/22/2009
Detect X-axis position and indicate it with an LED.Cable tester uses LEDs to find faults 10/22/2009
Test as many as 16 wires with LEDs as continuity indicators.Class B amplifier has automatic bias 10/22/2009
Biased transistors minimize distortion.Astable multivibrator gets hysteresis from positive-feedback stage 10/22/2009
Add hysteresis through positive feedback.Resistor compensates for instrumentation-amp gain drift 10/8/2009
Temperature makes instrumentation amp's gain drift; a resistor corrects it.Capacitance meter uses PLL for high accuracy 10/8/2009
An improvement on an old design lets you measure capacitors from 10 pF to 1 µF.ADVERTISEMENT
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