9V Power Supply | Electronic Project Circuits

Posts Tagged ‘9V power supply’

DC Power Supply 9 volt using TIP31 transistor

Today I receives electricity old printer from a friend. I think it can’t is usable , but power supply circuit still can be usable , modify be power supply source in electronics all work. I then build to is DC Power Supply 9 Volt Regulator, that can give current get about 1 Amp arrive at 2Amp. By I sees part already modify transistor TIP31 and part come to can be usable well. By can fine decorate VR1 for have voltage 9V DC according to can fix for Transistor TIP31, a friend can use other number all right such as TIP41 , MJE3055 , 2SC1061 etc. But must stick heat sink be appropriate with. The detail is other , see in the circuit yes.

Be the first to comment - What do you think? Posted by admin - November 30, 2008 at 6:10 am

Categories: Power supply Tags: 9V power supply, dc power supply, generator regulator

12V to 9V 2A step down dc converter using IC 741 and 2N3055

This circuit designs for modify power supply input 12V from battery or the other. Have the level voltage be down be left 9V be stable or , 9V at 2 Amp DC power supply . By this circuit gives usual equipment , seek easy. Be integrated circuit IC 741 and power transistor 2N3055. Besides this circuit still can fine to differ out voltage with well and have picture stability although load modify. The zener diode 8.2V be formed fix stable reference or voltage the referable at pin3 of the integrated circuit and the VR1 for give fine the level volt output.

Be the first to comment - What do you think? Posted by admin - November 6, 2008 at 5:57 am

Categories: DC converter, Power supply Tags: 9V power supply, dc converter step down voltage, dc voltage regulator

DC 12V to DC 6V-7.5V-9V Converter using 2N3055

This circuit is DC to DC converter model step down voltage. That can modify voltage input 12V DC from be DC 6V , 7.5V and 9V by have the size current about 1A – 2 Amp think. Be easy circuit use Zener diode maintain one’s position voltage. Be stable and have transistor 2N3055. When you several examples of the output voltage 6Vout, R1 =330 , ZD1=6.6V ; 7.5Vout, R1 = 270 , ZD1 = 8.2V ; 9Vout , R1=180 , ZD1=10V ; Perform enlarge the trend tallly go up fully be usable next , see the detail in the circuit and read to add