4 Mayıs 2010 Salı

15volt 30 amps Güç Kaynağı (POWER SUPPLY)

30 amp version PSF14A30 in transformer capable of delivering 20 amps @ 15volt 30 amps
4 x 2N3055 6 x 2n3055 Use a large radiator (heat sink) of appropriate size and surface area; insulating and heat-conducting spacer or at least a thin mica; hot adhesive and thermal paste
IC 1: 7812(small heatsink)

D1: MB2504  25 ampere köprü diot kullanılarak ve iyi soğutma sağlanarak uzun zaman çalıştırıla bilir BYW29 8 amp diodes (TO220 pinning, cooling)
30 Amper Devre Şeması

MALZEME LİSTESİ
D2,D3:1N1004
D4: 1N5401
C1: 22000uF+10000uF 35volts
C2: 47nF
C3:100uF/35volt
C4: 100nF
C5:4.7uF/35volt
C6:4.7uF/35volt
C7: 100nF
C8: 220nF
C9:220uF/25volt
C10: 47nF
C11, C12:100nF
R1: 2k2 /1W
R2: 10 1/2W 2,2 1/2W
R3: 6,8 1/2W 2,2 1/2W
R4': 1 Ohm 1/2W
R5': 0.1Ohm/10W
R6: 2k2
R7: 10
R8: 2k2
R9: 22
R10: 1k
R11: 10
P1: 500
F1: 2A 3.18A
F2: 22A 35A
P1 allows you to'trim' the output voltage exactly to 13.8 volts.Just to be sure to prevent HF entering (or going back to the use a ring core to turn the mains a few times around it(see insides pics).Be sure to use thick braid wires!!! They need to handle 20 30 Total revision changes. highly improved voltage stabilisation. output voltage feedback circuit stabilisation. BDX-33 removed. Cap after 7815 changed from 1uF to 4.7uF. Resistors before the input of the 7815 changed. reverse diode (between collector and emittor of 2n3055) removed. voltage can be set exactly to 13.8v (P1). minor HF-immunity changes Links of interest:ON6MU Homebrew projects Radioamateur related projects ON6MU 78h05_powersupply Versatile 7805 based 5Amp powersupply
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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)