Tny279pn Passive Pfc Led Lighting Supply
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LED Chaser
General There are many 9V chaser circuits that seem to waste about 7V when driving LEDs that are only about 2V. This project is unique, because it uses only two inexpensive alkaline battery cells totaling 3V for power. Since most...
Output sampling winding isolated switching power supply
The diagram illustrates the output sampling winding of an isolated switching power supply. In the diagram, T represents a high-frequency transformer; N2 denotes the self-oscillation positive feedback winding; N3 is the error amplifier; VTS is the winding that provides the...
line powered white leds
The LED circuit illustrated below features 25 white LEDs connected in series to a 120VAC power supply. This configuration can be adjusted to accommodate a different number of LEDs by modifying the resistor value. The specific resistance required will depend...
Multicolor HD LED
Most PC enclosures provide only a single LED to indicate hard disk access, with the LED being connected to the motherboard via a two-pin connector. However, this LED only works with IDE drives, and if a SCSI disk controller is...
LED Volt Meter
This circuit is a simple LED voltmeter designed to monitor the charge level of lead-acid or tubular batteries. The terminal voltage of the battery is displayed through four LED indicators. The nominal terminal voltage for a fully charged lead-acid battery...
classic led flasher circuit
This LED flasher circuit is a classic two-transistor flip-flop. It is a popular circuit often built by beginners in the electronics hobby. The schematic diagram of this well-known LED flasher circuit includes two transistors, two capacitors, four resistors, and two...
simple led torch circuit
This circuit is a simple LED torch utilizing the MAX660 integrated circuit from MAXIM semiconductors. The MAX660 is a CMOS monolithic voltage converter IC capable of driving three bright white LEDs connected in parallel to output pin 8 of the...
Blinking LEDs to Music
This is a straightforward project suitable for individuals with basic electronic skills. Connecting this circuit to an audio source will cause the LEDs to blink in sync with the rhythm.
The described project is an audio-activated LED circuit that visually responds...
0-12V 2A power supply
This project has two options. It can be a mains operated project, using a 2155 or 2156 transformer or it can be connected to a plug pack. We recommend it be connected to a 16v AC 1 amp plug pack...