Power Supply Adapter

This is the circuit diagram of 6VDC to 12VDC Converter. With this circuit , you can doubled the input voltage of 6V DC to become 12V DC output voltage. Component Parts : R1, R4 = 2.2K R2, R3 = 4.7K R5 = 1K R6 = 1.5K R7 = 33K R8 = 10K C1,C2 = 0.1uF C3 = 470uF/25V D1 = 1N914 D2 = 1N4004 D3 = 12V 400mW Zener Diode Q1, Q2, Q4 = BC547 Q3 = BD679 L1 See Notes Circuit Notes : 1. L1 is a custom inductor wound with about 80 turns of 0.5mm magnet wire around a toroidal core with a 40mm outside diameter. 2. Different values of D3 can be used to get different output voltages from about 0.6V to around 30V. Note that at higher voltages the circuit might not perform as well and may not produce as much current. You may also need to use a larger C3 for higher voltages and/or higher currents. 3. You can use a larger value for capacitor C3 to provide better filtering. 4. The circuit will require about 2A from the 6V supply to provide the full 800mA at 12V. 6VDC to 12VDV Converter circuit, source: http:/...

Here's a circuit diagram of the power supply and battery charger. There are two parts in this circuit, ie the battery charger with a fixed output voltage, which is 5VDC. Another part is the regulated power supply that can be regulated output voltage between 2-9 volts. source: http://www.electronics-lab.com

This is a digital variable power supply circuit which controlled using microcontroller chip PIC family. Circuit Diagram : For detailed information, visit this Digital PIC Power Supply circuit page

Here the another variable power supply which have adjustabled output voltage from 6-12 DC volt. Parts List: T1 = 115[220]/8 VAC transformer. Q1 = 2N1613, NTE128, or substitute. Use heatsink! BR1 = 40V, 4A. (Check max current of your mini-drill and add 2A) R1 = 470 ohm, 5% R2 = 1K, 5% P1 = potentiometer, 10K C1 = 1000uF, 25V Notes: C1 filters the noise and spikes off the AC. If you find the circuit output too noisy add another electrolytic capacitor over the output terminals. Value can be between 10 and 100uF/25V. The output voltage is variable with the 10K-potentiometer. The transformer input voltage refer to your home power source.

This simple circuit makes it posible to monitor the charging process to a higher level. If you need more information then check out the LM3914 Datasheet . Final adjustsments are simple and the only thing needed is a digital voltmeter for the necessary accuracy. Connect an input voltage of 12.65 volt between the positive and negative poles and adjust the 10K trimmer potentiometer until Led 10 lights up. Lower the voltage and in sequence all other Led's will light up. Check that Led 1 lights up at approximately 11.89 volts. At 12.65 volt and higher the battery is fully charged, and at 11.89 is considered 'empty'. The green Led's indicate that the battery capacity is more than 50%, the yellow Led's indicate a capacity of 30% - 50% and the red Led's less that 30%. This circuit, with the components shown, uses less than 10mA. Of course you can adapt this circuit to your own needs by making small modifications. The circuits above is set for 'DOT' mode, meanin...

Do you need assembled power supply ..? If your answer is yes, then this assembled digital power supply should be great to buy. Product specification: Two level of control for both current and voltage outputs: coarse and fine for ease of use Adjustable outputs: 0-30V and 0-5A Input voltage: 110V AC and 220V AC switchable Ripple noise: CV You can BUY THIS POWER SUPPLY at Amazon.com

This is a very simple battery charger for your car battery. The most expensive part of this circuit is a 5 A transformer. A car battery has very high value of electric current , so it's require battery charger with high electric current output.