1.3 - 32 V / 5A Power Supply w/ Short Circuit Protection by LM338

• 1.3 - 32 V / 5A Power Supply w/ Short Circuit Protection by LM338

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    Description
    
     This is a very easy to build power supply that is based on LM338 5A adjustable voltage regulator. I am using the supply for a long time, have no problem yet. Only current adjust is missing but I overcome this situation by using an LCD panel ampermeter.
     There is no PCB for the circuit. I took a 3x16 copper plate and strip the unused areas by a knife. If you want you can use analog meters instead of LCD panels.
    
    

    
    
    

    

    
    

    

    
    
    Notes
    
    
    

    • Use thick wires for connections.
    • When connecting the LM338 to the heatsink use thermal paste.
    • Use external supplies for LCD panels. They can be 9V batteries. The panels I use draws 1mA current and the batteries last sufficiently long time. If you have small transformers which can supply regulated 9V, you can use them. You need separate transformers for each panel!
    • The transformer should be 100 Watt but if you don't need high current you can try transformers that you already have. (I can draw 6A from 100Watt transformer.)
    • If you have multi winding transformer you can use the diode connections shown in schematic. Diodes must be 10-15 A.
    • Be careful while connecting LM338. Don't put it inverse.
    • Output of your transformer mustn't exceed 25V AC.

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0-50V 2A Bench power supply

• 0-50V 2A Bench power supply

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    I use the lm10 IC because it has a reference voltage and thats useful for dc power supply. With two ICs can take different output voltage and amperage. This circuit is protected from short circuit.P2 is for controlling the current at the range of 0-2A. Stabilize the output voltage with R4 on negative pin on op-amp and with R2 & P1 on positive pin.

    Op-amp output controls T1 that not let ripple of voltage.T1 increase or decrease ampere of R6 and control the voltage of T5 & T4. Pin 1 is the reference voltage and reference voltage is losing some voltage on R1 that has 100uA . This current passes through P1 too.

    Vlose p1=100uA*Rp1

    This lose voltage regulate output voltage rate of output current is compare between reference voltage of P3 and lose voltage on R11.T3 is protecting short circuit with R11. For reduce out put voltage to 0v should parallel one resistor 470 ohm in out put. Minimum voltage is 0.4v. The maximum output voltage is fixed with R1b and should not become over of 50v. Therefore your transformer should give 36V, 3A with 4700uF capacitor. T6, T5, T7 need heatsilk.
    
    
    

    

    
    

    R1a = 2,2 K
     R1b = read the text
     R2 = 10 K
     R3, R7 = 3.3 k
     R4 = 390 Ohm
     R5 = 47 K
     R6 = 3.3 K 1Watt
     R8 = 180 Ohm
     R9, R10 = 0.47 Ohm 3Watt
     R11 = 0.075 Ohm 2Watt
     R12 = 470 Ohm
     P1 = 500K liner potentiometer
     P2 = 4.7 K potentiometer
     P3 = 10 K potentiometer
     C1 = 1nF
     C2 = 10nF
     C3 = 22nF
     C4 = 47mF 63v electrolytic
     C5 = 4700mF 80v electrolytic
     T1, T2 = BC161
     T3, T4 = BD141
     T5 = BD241
     T6, T7 = 2V3055
     D1, D2 = 1N4148
     D3, D4 = 1N4001
     IC1, IC2 = LM10C

Posted from Diigo. The rest of my favorite links are here.

24 volt ayarlı güç kaynağı

http://www.uydudoktoru.com/guc-kaynaklari-besleme-devreleri/2601-24-volt-ayarli-guc-kaynagi.html

 

24 volt ayarlı güç kaynağı devresi

Hoparlör kabini nasıl yapılır diyenler buyursun

• Hoparlör kabini nasıl yapılır diyenler buyursun

  • Hoparlör kabini nasıl yapılır diyenler buyursun

Posted from Diigo. The rest of my favorite links are here.

0-30 volt 50 amper Kısa Devre Korumalı Güç Kaynağı

• 0-30 volt 50 amper Kısa Devre Korumalı Güç Kaynağı

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     0-30 volt 50 amper Kısa Devre Korumalı Güç Kaynağı devresi yukarda mevcut olup güçlü bir besleme trafosu ve sağlan bir baskı devre üzerine tasarımı ile iyi bir sonuç elde edebilirsiniz.

Posted from Diigo. The rest of my favorite links are here.

2-30volt / 5 Amper Ayarlı Güç Kaynağı / Kısa Devre Korumalı

• 2-30volt / 5 Amper Ayarlı Güç Kaynağı / Kısa Devre Korumalı

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     Yapımı oldukça basit, 2-30volt/5 Amper ayarlı tam regüleli ve oldukça kaliteli çıkış verebilen kısa devre korumalı bir devredir. Amatör veya Profesyonel kullanımlara uygundur. Bu devreyi inceleyen veya yapmak isteyen arkadaşlardan rica'm lütfen yapıcı yorumlar yazın. bu devre test edilmiş sonrasında burada paylaşıma açılmıştır.
    
    Resimi daha büyük görmek için tıklayınız

Posted from Diigo. The rest of my favorite links are here.

Güç Kaynağı 13.8V 30-40A arası kısa devre korumalı

http://www.uydudoktoru.com/guc-kaynaklari-besleme-devreleri/7326-guc-kaynagi-13-8v-30-40a-arasi-kisa-devre-korumali.html