4 Mayıs 2010 Salı

12 amper Güç Kaynağı (POWER SUPPLY)

ON6MU:12 ampere,20or30 amps powersupply(bdx332n3055)




Revision 3
Zd was wrongly connected after the relay switch instead of before C5 changed to 330uF to improve ripple rejection and stabelisation primary side of the transformer added 250v/2n2 decoupling cap
P1 = 500Ohms or 1k trimmer is sufficien
RE-PSF14A12D
Power supply Şema 1
BDX-33 transistors kullanarak kendi yaptığımız Powersuppley





Part list PSF14A12D
12 Amp BDX33-based power supply:
2 x 15 volt 6+ amps 2 times two MR750 (MR7510) diodes (MR750 = 6 Ampere diode) or 2 times
3 1N5401 (1N5408) diodes.
F1 = 1,5 (2) Amp F2 = 15 amp
R1 2k2  1Watt
R2 10k
R3 1k 0.5 watt
R4,R5,R6,R7 0.1ohm 10watt
R8 4.7
R9 6k8
C1 two times 4700uF/35v
C2,C5 330uF/35v
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
C1 78L15
relay 12 volt 2x5 amp switching
T0,T1,T2 = BDX-33 NPN TO-220 transistor 3 darlington transistors:
Zd 8 or 9 volt, 5 watt
P1 1k
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İzleyiciler

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.

Supply Voltage
VOLTS
Voltage Drop Across LED
VOLTS
Desired LED Current
MILLIAMPS



Calculated Limiting Resistor
OHMS
Nearest higher rated 10% resistor

Calculated Resistor Wattage
WATTS
Safe pick is a resistor with
power rating of (common values are .25W, .5W, and 1W)
WATTS

LEDs in series

Several leds in series with one resistor
Supply Voltage
VOLTS
Voltage Drop Across LED
VOLTS
Desired LED Current
MILLIAMPS
How many LEDs connected




Calculated Limiting Resistor
OHMS
Nearest higher rated 10% resistor

Calculated Resistor Wattage
WATTS
Safe pick is a resistor with
power rating of (common values are .25W, .5W, and 1W)
WATTS
LM317 UYGULAMA DEVRELERİ HESAPLAMASI

 




Çıkış Voltajı
R1 resistor

R2 resistor

R1 resistor
R2 resistor

Çıkış Voltajı


Lm317 uygulama devreleri ve detayli bilgiye Buradan ulasabilirsiniz

LM555 - ASTABLE OSCILLATOR CALCULATOR

LM555 - ASTABLE OSCILLATOR CALCULATOR
Value Of R1 Ohms Value Of R2 Ohms
Value Of C1 Microfarads
Output Time HIGH SECONDS Output Time LOW SECONDS Output Period HIGH + LOW SECONDS Output Frequency HERTZ Output Duty Cycle PERCENT
Resistor values are in Ohms (1K = 1000) - Capacitor values are in Microfarads (1uF = 1)

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

LM555 - ASTABLE CAPACITOR CALCULATOR

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
Capacitance uF
s

VOLT AMPER OHM ve WATT HESAPLAMA

Current:
kA (kiloamps) A (amps) mA (milliamps) µA (microamps)
Voltage:
kV (kilovolts) V (volts) mV (millivolts) µV (microvolts)