Archive for the Category


Automatic Charger and Full charged indicator using LM317K-TL431

Sunday, January 31st, 2010

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This is circuit Automatic Charger and Full charged indicator. For 24V batteries it can charger with current be stable about 1.5A and have voltage output 27Volt with integrated number circuit LM317K. When the battery has had full already , as a result will cut the work. There is a tube LED show [...]

Low Noise Variable Output 1.25V to 12Vdc

Wednesday, January 27th, 2010

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This circuit is DC converter low voltage , 12V from be 1.25V to 10Vdc by can give current topmost get about 1.5A. You should use IC number LM317K because have electric many power more the number LM317T. By should hold heat sink. That have large-sized with. The R4 use for fine decorate voltage [...]

Variable Dual Power Supply LM317-LM337

Sunday, October 25th, 2009

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Power Supply circuit above shows the circuit layout for this project. A centre tapped transformer (TR1) is used with two 12V secondary windings with its centre tap tied to ground. This allows positive and negative voltages to be generated with respect to the central ground. Rectification follows based upon the bridge rectifier (BR1) and smoothing [...]