Showing posts with label variable. Show all posts
Showing posts with label variable. Show all posts
Sunday, October 19, 2014
0 50V 1A Laboratory Power Supply Variable Voltage
Laboratory Power Supply – Variable voltage from 0V to 50V and variable current from 0A to 1A
Reverse engineered circuit diagram of an expensive commercial variable lab power supply. This unit is designed around an ordinary op-amp and easy to obtain parts. Although the unit uses a single transformer with two output windings the circuit works equally well using a big transformer and a little transformer.
Read More Source:http://members.shaw.ca/novotill/LabSupply50V1A/index.htm
Thank you.
Friday, October 3, 2014
Variable DC Power Supply LM317 circuit and explanation
This DC power supply circuit is adjustable using IC Voltage RegulatorLM317. LM317 is a versatile and highly efficient 1.2-37V voltageregulator that can provide up to 1.5A of current with a large heat sink. Its ideal for just about any application. This was my first workbench power supply and I still use it.
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Since LM317 is protected against short-circuit, no fuse is necessary. Thanks to automatic thermal shutdown, it will turn off if heating excessively. All in all, a very powerful (and affordable!) package, indeed. Although voltage regulator LM317 is capable of delivering up to 37V, the DC power supply output circuit here is limited to 25V for the sake of safety and simplicity. Any higher output voltage would require additional components and a larger heat sink. Make sure that the input voltage is at least a couple of Volts higher than the desired output. Its ok to use a trimpot if youre building a fixed-voltage supply.
Problems: Follow all the safety precautions when working with mains voltage. Insulate all connections on the transformer. Possible uses: Variable workbench power supply, fixed-voltage supply. Just about any possible application when no more than 1.5A is necessaryhis BlogThis!Share to TwitterShare to FacebookShare to Google Buz
Read More..
Since LM317 is protected against short-circuit, no fuse is necessary. Thanks to automatic thermal shutdown, it will turn off if heating excessively. All in all, a very powerful (and affordable!) package, indeed. Although voltage regulator LM317 is capable of delivering up to 37V, the DC power supply output circuit here is limited to 25V for the sake of safety and simplicity. Any higher output voltage would require additional components and a larger heat sink. Make sure that the input voltage is at least a couple of Volts higher than the desired output. Its ok to use a trimpot if youre building a fixed-voltage supply.
Problems: Follow all the safety precautions when working with mains voltage. Insulate all connections on the transformer. Possible uses: Variable workbench power supply, fixed-voltage supply. Just about any possible application when no more than 1.5A is necessaryhis BlogThis!Share to TwitterShare to FacebookShare to Google Buz
Tuesday, September 23, 2014
Low Noise Variable Output 1 25V to 12Vdc
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 output. The C1,C3 , and , C2 , for decrease all noise well. The detail is other , see in the circuit.
circuit source by joe (aircraftdesigner)
Wednesday, September 17, 2014
0 To 12V 1A Variable Power Supply Wiring diagram Schematic
This 0- to 12-Vdc variable power supply uses an IC voltage regulator and a heavy-duty transformer to provide a reliable dc power supply. Looking at the schematic shown, you can sec that transformer Tl has a 120-V primary and a 28-V secondary. Filtered dc is fed to the input (pin 2) of the LM317T voltage regulator, IC, which keeps the voltage at its output constant (pin 3) regardless (within limitations) of the input voltage.
Pin 1 of the LM317T is the adjustment pin. Varying the voltage on pin 1 (via PI) varies the output voltage. Diodes D5 through D7 and LEDs LI through L3 give an approximate indication of the output voltage. Each LED/diode path has a limiting resistor to limit the current to a level that is safe for the LED.
Build a 0 To 12V, 1A Variable Power Supply Circuit Diagram
Monday, August 25, 2014
Power Supply Variable 1 3V 12 2V 1A Circuit
Power supply circuit to generate output below were variations between 1.3V DC to 12.2V DC with 1A current. In addition, the power supply circuit is also equipped with over-current protection or shield against belebih flow. Power supply circuit is very simple, but the quality is quite good, made her basiskan regulator IC LM723 is a pretty legendary.
Read moreMonday, August 18, 2014
Linear Variable Differential Transformer Wiring diagram Schematic
This is the linear variable differential transformer driver demodulator schema diagram. A very simple motion transducer can be constructed using the schema shown. The output is biased to one-half the supply voltage. This requires special interface schemary for the signal readout.
Linear Variable Differential Transformer Circuit Diagram
One simple method is to use a zero center meter in a bridge configuration. Displacement now can be measured as a positive or negative meter reading. Readout sensitivity is a function of the particular linear variable differential transformer and of the gain of the error amplifier. De offsets can be nulled by using a simple offset adjustment schema as indicated.
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