4 Mayıs 2010 Salı
20/22 Amp 13.8 Volt GÜÇ KAYNAĞI (POWER SUPPLY)
20 Amp BDX33-based power supply:2 x 15 volt 12+ amps 2 times 3 MR750 (MR7510) diodes (MR750 = 6 Ampere diode) or 2 times 5 1N5401 (1N5408) diodes
List PSF14A20D
F1 = 3,18 Amp
F2 = 25 amp
R1 2k2 1 Watt
R2 10k
R3 1k 0.5 watt
R4,R5,R6,R7 0.1 ohm 10 watt
R8 4.7
R9 6k8
C1 22000uF/35v
C2, C5 330uF/35v
schematic 2
revision 2:
C5 = 330uF -improved ripple rejection and stabelisation
C0',C3,C4,C6,C10 100nF
C7 330uF/25v
C8 47nF
C9 47uF/25v
D1 1N5401
D2 LED
D3, D4, D5 1N4001
IC1 7815
relay 12 volt 10 amp switching
Four darlington transistors: T0,T1,T2,T3 = BDX-33 NPN TO-220 transistor
Zd 8 or 9 volt, 5 watt
P1 2k trimmer If using bridge rectifier (like in schematic 2) you do not need 2 x 15 volts 12 amps, but 1 x 15 volt 20 Amps The power supply insides.
İzleyiciler
TIMING CALCULATORS FOR THE LM555
TIMING CALCULATORS FOR THE LM555
LED DİRENÇ HESAPLAMA
All LEDs require current limiting, without a current limiting mechanism the LED will usually burn out in under a second. Adding a simple resistor is the easiest way to limit the current. Use the calculator below to find out the value of resistor you require.
For example if you are wanting to power one of our_blank">red LEDs in an automotive application you would see that the typical forward voltage is 2.0 Volts and the maximum continuous forward current is 30mA. Therefore you would enter 14.5, 2.0 and 30 into the Single LED calculation box. After calculating you get 470ohm 1 watt as the result. Here is a that allows you to enter a resistor value and generate the corresponding color code.
Note: For automotive applications use the actual system voltage, not 12 Volts. Most 12 Volt system actually operate at around 14.5 Volts.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgm-yGGqudVdqCqZqJGyGb4gL94WJx_Q1frdAP5LyA7mHYpeapAFZ7P1oF3DIgvXBQa2-kTsOEtWQjGwyuTOoKlSMWgxkJlO2k5TSJl2ikveCFQ8be18McgRpXmYe_Wrt2Na7Jmmn58xJsD/s320/single.gif)
Lm317 uygulama devreleri ve detayli bilgiye Buradan ulasabilirsiniz |
LM555 - ASTABLE OSCILLATOR CALCULATOR
NOTE: The leakage currents of electrolytic capacitors will affect the actual output results of the timers. To compensate for leakage it is often better to use a higher value capacitor and lower value resistances in the timer circuits.
LM555 Astable Oscillator Circuit Diagram
The next calculator can find the capacitance needed for a particular output frequency if the values of R1 and R2 are known.
Value Of R1 Ohms | Value Of R2 Ohms |
Frequency Desired Hertz |
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VOLT AMPER OHM ve WATT HESAPLAMA
![](http://www.blogger.com/NotCalculated.gif)
![](http://www.blogger.com/NotCalculated.gif)
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