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Simple and cheap, the circuit built based on well-known IC regulator LM317 with current booster of power transistor 2N3782. Don’t forget to add heatsink especially for power transistor 2N3782.

You can pick up a 3½-digit digital volt-meter module nowadays for a little as a couple quid. This is a simple and expensive way to fit out a piece of equipment with an instrument. Most modules are based on the well-known ICL7106 IC . They operate from an ordinary 9-V battery, and they only provide a fixed measuring range (200 mV or 2 V). The accessory circuit described here converts a DVM module into a voltmeter with 20-V and 200-V measuring ranges, with the added bonus of automatic range switching. This requires a ground-referenced symmetrical supply voltage (±5 V) instead of a battery. An inexpensive TL431C is also used to generate an adjustable reference volt-age from the supply voltage. The circuit described here uses an LCD module with a fixed measuring range of 200 mV. It has three pins for driving the decimal point; two of them are used here. Automatic Range Switching Schematic This is how the circuit works: IC1 converts the voltage to be measured by the DVM m...

CHALLENGES DESIGN OF SWITCHING LED ELECTRONIC DIAGRAM The LED WEBENCH® online design environment predicts and simulates the response of an LED to constant current while taking into account several potential design parameters that are new to designers of traditional switching regulators.

This circuit supplying current maximum10A with an adjustable output voltage from 0-25 VDC. Adjustable Switching Regulator L4970 Series is built with the main component as a Switching Regulator IC L4970. Switching Regulator L4970 series include not complicated to make his own, which need to be considered is the IC L4970 require sufficient cooling to operate in an optimal and durable. Adjustable Switching Regulator L4970 series are complete can be seen in thethe following figure . Adjustable switching power supply schematics To set the output voltage range Adjustable Switching Regulator L4970 can be in control by adjusting the potentiometer 18KOhm tus.

Switching Power Supply in this article are able to supply power 90 Watt. Switching Power Supply series is built directly from an AC network system using special IC MC33374 switching power supply in the form of High Voltage Power Switching Regulator and with external components to the other. IC MC33374 IC is a switching power supply designed to operate with an AC voltage source and works as a power switching converter with flyback technique. Switching Power Supply Series has a 15 volt DC output with current up to 6 Ampere. 90 Watt Switching Power Supply Schematic Series 90 Watt Switching Power Supply works by menyearahkan AC source is then used to activate the converter MC33374 system. The output of transformer switching converter MC33374 searahkan again later on as a DC voltage supply to be used for electronic devices.

The schematic above can be used for supply on color TV for all type TV circuit. But we need to know how much voltage needed by the circuit of color Television. To set the output voltage, the setting on VR1 1K ohm. Required input voltage 300V DC which is already on TV circuit, so we just take a 300V dc voltage existing on the TV circuit, and for a circuit supply voltage on our TV cut the line PCB and connected with this  universal switching power supply.For the transformer we can use the TV regulator transformer. Part List : R1 = 33R 5W R2 = 330R 1W R3 = 2K2 R4 = 47K R5 = 2K7 R6 = 22K R7 = 390K R8 = 47R 1W C1 = 100uF 25V C2 = 1n2 2KV C3 = 18n C4 = 18n D1 = 1N4148 D2 = 1N4148 D3 = ZD 12V D4 = 1N4007 D5 = 1N4007 VR1 = 1K ZD1 = Zener 6V T1    = TV regulator transformer Q1   = K2847 Q2   = C2328A PCB line Finishes circuit

Switching Power supply circuit produces a voltage B + (dc voltage) needed television series taken from the net voltage household. G7 G7A chassis and power supply circuit using cool / cold in which the primary and the secondary power supply electrically separated so that the chassis can be directly connected to another device via an audio video terminal. Switching power supply This power supply circuit is a type SMPS (Switching Mode Power Supply) using mosfet transistor integrated circuit voltage controller in one IC package, namely STR-W6654. This IC will control the duty cycle of time off Vth2 Mosfet transistor to control the output voltage. Besides, the IC is also equipped with a safety circuit against overvoltage (OVP), overcurrent (OCP) and over temperature (TSD) circuit is working on 220V ac voltage with the input ac voltage range of 176V to 260V ac or known by the Wide range Regulators. How to Work Series Initial bias voltage dc pin6 IC801 obtained from an ac voltage through D811...

ADJUSTABLE 1.5A STEP DOWN 1.5MHz SWITCHING REGULATOR ELECTRONIC DIAGRAM However, an Adjustable 1.5A Step Down 1.5 MHz switching regulator circuit can also be used to overcome such problem. It uses ST1S03 step down DC-DC converter. The ST1S03 can also be used to power low-voltage digital core in HDD application . With input voltage range 3V to 16V, the ST1S03 can gives current up to 1.5A. The circuit can use tiny surface-mount components due to an high switching frequency (1.5 MHz). Resistor divider is used to set the output voltage value. Components needed to build the divided are capacitors (2 pieces), schottky diode (1 piece), and inductor (1 piece).

This power supply uses two VN400A 400 Volts  MOSFETs in a half-bridge power switch configuration. Each output consists of +5V at 20 A and 15 V at 1 A . Three-terminal regulators are used for the low-currents outputs , either 12 Volts or 15 Volts can be made available with a simple change in the transformer secondary windings. Schematic diagram below : IC TL494 switching regulator IC provides pulse-with modulation control and drive signals for the power supply , The upper MOSFET , Q7 , in the power switch stage is driven by a simple transformer drive circuit. The lower MOSFET , Q6 , since it ground referenced , is directly driven from the control IC.