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 this circuit can give voltage 9 Volt at 1 Amp, be stable or can fine can decorate 6V to 12V with VR1 control. 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 part BC182 use other number can replace get.The detail is other , see in the circuit. Sometimes you may not need to use the upper circuit, [...]

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. Related Links All Circuits of 9V power supply All Circuits of DC converter step down voltage All Circuits of Step down converter DC voltage regulator All Circuits of Fixed voltage regulator Micro DC Converter 3V to 9V using TL496 power supply regulator mini 9V 0.75A by Transistor power supply [...]

This is the Power Switching Regulator 9V Circuit that is low current power output and It has strong point is the voltage input change from 2.4V to 10V but a constant voltage output 9 Volt. We used the RC4193 Micropower Switching Regulator is the base, easy to use and there are a few parts in circuit. The test battery point for check voltage of batter or input. The low power switching regulator IC, number: RC4193, that that Contained in a small body of caterpillar 8-pin. It is designed for devices that work with batteries. The DC regulator power supply is built by the 11 normal parts. By has the 5 resistors, 2 capacitors, a diode, a choke coil and IC no.RC4193 and that importance the battery 2.4 volt to 9 volt : 1 set. How it works -This power supply has stable output voltage at 9V until battery is worn [...]

power supply regulator mini 9V 0.75A by Transistor BD242 and BC549C. VR1-1K control Volt output.VR2-1K control current output. If you have old equipment from tape radio will to do good. I advises that try bring build , mini power supply 9Volt all right. By I uses the transistor number BD242 , the diode the ordinary and part the other a little again. It can help modify voltage 12VDC from be 9VDC 0.75A . For VR1 and VR2 use for fine decorate voltage and current can follow want. You can see the detail can add in the circuit. Related Links More circuit about DC Voltage Regulator More Circuit about Mini Project More Circuit about 9V power supply 9V 2A Power Supply by 78S09 Supply 9VDC no transformer

Description: A simple 9 Volt 2 amp supply using a single IC regulator. Notes: There is little to be said about this circuit. All the work is done by the regulator. The 78S09 can deliver up to 2 amps continuous output whilst maintaining a low noise and very well regulated supply. The circuit will work without the extra components, but for reverse polarity protection a 1N5400 diode is provided at the input, extra smoothing being provided by C1. The output stage includes C2 for extra filtering, if powering a logic circuit than a 100nF capacitor is also desirable to remove any high frequency switching noise. Circuit : Andy Collinson Email: anc@mitedu.freeserve.co.uk Read More source : http://www.zen22142.zen.co.uk/Circuits/Power/9v2a.htm Related Links More DC Voltage Regulator Circuit Supply 9VDC no transformer More Circuit by IC 7809 More Circuit about 9V power supply Regulator 5V,6V,9V,12V 1A By IC 7805,7806,7809,7812 7805+Mj2955 power supply 5V 5A for [...]