"0-30 VDC STABILIZED POWER SUPPLY WITH CURRENT CONTROL 0.002-3 A
0-30 VDC STABİLİZE GÜÇ KAYNAĞI İLE AKIM KONTROL,002-3 A
Orijinal görüntüsünü görmek için buraya tıklayın. 925x541 px.
General Description
This is a high quality power supply with a continuously variable stabilised output adjustable at any value between 0 and 30VDC. The circuit also incorporates an electronic output current limiter that effectively controls the output current from a few milliamperes (2 mA) to the maximum output of three amperes that the circuit can deliver. This feature makes this power supply indispensable in the experimenters laboratory as it is possible to limit the current to the typical maximum that a circuit under test may require, and power it up then, without any fear that it may be damaged if something goes wrong.
There is also a visual indication that the current limiter is in operation so that you can see at a glance that your circuit is exceeding or not its preset limits.
Technical Specifications - Characteristics
Input Voltage: ................ 24 VAC
Input Current: ................ 3 A (max)
Output Voltage: ............. 0-30 V adjustable
Output Current: ............. 2 mA-3 A adjustable
Output Voltage Ripple: . 0.01 % maximum
FEATURES
- Reduced dimensions, easy construction, simple operation.
- Output voltage easily adjustable.
- Output current limiting with visual indication.
- Complete protection of the supplied device against over loads and malfunction.
How it Works
To start with, there is a step-down mains transformer with a secondary winding rated at 24 V/3 A, which is connected across the input points of the circuit at pins 1 & 2. (the quality of the supplies output will be directly proportional to the quality of the transformer). The AC voltage of the transformers secondary winding is rectified by the bridge formed by the four diodes D1-D4. The DC voltage taken across the output of the bridge is smoothed by the filter formed by the
"Build a flicker circuit
Electronic circuits to make lights flicker can be quite expensive. However, this circuit is easy to make and costs only a few dollars.
The flicker effect will be caused by the erratic behavior of a thermal cutout switch in a fluorescent lamp starter. This circuit will work with lamps ranging from 7 to 40 watts. You can use more than one lamp so long as you do not exceed the wattage total.
It is strongly recommended to put the starter into a metal electrical box because it will get hot.
Below is a suggestion to make a reliable and safe connection to the terminals on the lamp starter.
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Alternatif Link
http://www.fileswap.com/dl/XykMJpxNz...ICKER.zip.html
Yukarda bir kaç örnek ekledim arkadaşlar zip içerisinde resimler ide pdf açıklamaları mevcuttur.. "
"Mosfet TESTER
This is a variation on the astable multivibrator. Circuit was recently developed to test for N-mosfets(the power kind e.g irf 830)
I don't claim circuit can test all bad mosfets or all fault mosfet conditions. If mosfet is working it will operate in the astable multivibrator circuit causing the Led to flash.
A bad mosfet will not cause the LED to flash.
Below is the circuit diagram, the other half of the astable utilizes an npn transistor to make the circuit cheap.
Almost any npn transistor will work in this circuit.
The npn transistor to the right is used as a common emitter buffer that also drives the led as it receives pulses from the mosfet drain.
Orijinal görüntüsünü görmek için buraya tıklayın. 622x444 px.
note diode is a light emitting Diode"