Electronic Circuits

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  • ▼  2008 (33)
    • ▼  May (33)
      • Variable Power Supply
      • Unregulated Power Supply
      • Extension Phone Switcher
      • Dark Activated Switch
      • Adjustable Dancing Lights
      • A Low Distortion Audio Preamplifier
      • A Highly Efficient DC Lamp Dimmer
      • 9 Volt 2 Amp Power Supply
      • Unregulated Power Supply
      • Shutter Guard
      • PC-Based Oscilloscope
      • Fuse Monitor
      • Under-/Over-Voltage Beep For Manual Stabiliser
      • Telephone Ring Generator
      • Telephone Audio Interface
      • Powerful AM Radio Transmitter
      • LED 12 Volt Lead Acid Battery Meter
      • FM Beacon Broadcast Transmitter
      • Teleconfrencing System
      • FM-Transmitter
      • Watch Dog For Telephones
      • Clapp Switch
      • Photo Electric Strret Light
      • Simple Infra-Red Detector
      • Decibel Meter
      • Audio Booster
      • Game Show Timer
      • Car Back Up Alarm
      • Mobile Phone Battery Charger
      • Song Number Display
      • Touch Switch
      • PHONE BROADCASTER
      • AM TRANSMITTER ...

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Wednesday, May 21, 2008

Variable Power Supply


Using the versatile L200 voltage regulator, this power supply has independent voltage and current limits. The mains transformer has a 12volt,2 amp rated secondary, the primary winding should equal the electricity supply. The 10k control is adjusts voltage output from about 3 to 15 volts, and the 47 ohm control is the current limit. This is 10mA minimum and 2 amp maximum. Reaching the current limit will reduce the output voltage to zero.

Posted by kingmakers at 10:51 PM

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