Many DIY projects require a small Power Supply. The 78XX family is ideally suited for this job, and with this little PCB you can easily build small Power Supplies for virtually every application. The circuit is very simple: The Alternating current is applied to X1 and rectifies by B1. It charges a large Capacitor C1 [...]
Switch Mode Pre-Regulator Circuit The botheration was that a voltage regulator had to bead the 18 volt capital ability accumulation voltage to 8 volts at 500ma to ability the CD player, crumbling 5 watts of ability and causing a lot of calefaction central the bunched unit. This ambit acts as an interference-free pre-regulator to abundantly [...]
Figure 1. Substituting the diode-capacitor network shown for an inductor allows this switching-regulator IC to deliver 2mA at comparable line and load regulation, with somewhat reduced efficiency. Figure 2. Introducing a MOS driver (IC2) enables the Figure 1 circuit to deliver as much as 20mA. In conventional applications, switching-regulator ICs regulate VOUT by controlling the [...]
LM317T Voltage Regulator with Pass Transistor The LM317T output current can be increased by using an additional power transistor to share a portion of the total current. The amount of current sharing is established with a resistor placed in series with the 317 input and a resistor placed in series with the emitter of the [...]
Zener Controlled Transistor Voltage Regulators By john The efficiency of Zener regulated power supply becomes very low when the load current is high. Under such conditions a Zener controlled transistor is always used for maintaining output voltage constant. Basically there are two types of Zener controlled transistor voltage regulators. They are Series Voltage Regulators Shunt [...]
Dual Regulated Power Supply High Current Schematic Circuit The circuit given here is of a regulated dual power supply that provides +12V and -12V from the AC mains. A power supply like this is a very essential tool on the work bench of an electronic hobbyist. The transformer T1 steps down the AC mains voltage [...]
