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Today we'll answer the frequently asked question. "why LED strip light won't light up". If you find your flexible LED strip light won't light up or power up, you may check the following troubleshooting information for help. 1. The lamp beads of led strip light must be broken or damaged during transportation if the light is not covered with full protection. 2. There must be a faulty at the light's soldering points. The soldering may come off if there is any shock during transportation. 3. Soldering with poor quality may cause embrittlement or shedding when the strip light is bent for use. 4. Cheat on tin soldering materials can also cause the same problem as the 2 point we just mentioned. 5. LED lights with flexible installation bending angle is too large, resulting in LED lights with flexible joints and lead to bright copper separation flexible led strip lights 6. A excessive bending may result in the disconnection between the joints and copper foil. 7. Th...

Features: Class-T architecture Pin compatible with Tripath TK2150 Proprietary Digital Power Processing technology "Audiophile" Sound Quality 0.02% THD+N @ 50W, 8Ω 0.03% IHF-IM @ 30W, 8Ω High Efficiency 95% @ 150W @ 8Ω 90% @ 275W @ 4Ω Supports wide range of output power levels Up to 300W/channel (4Ω), single-endedoutputs Up to 1000W (4Ω), bridged outputs Output over-current protection Over- and under-voltage protection Over-temperature protection Application Audio/Video Amplifiers & Receivers Pro-audio Amplifiers Automobile Power Amplifiers Subwoofer Amplifiers Circuit Diagram Up to 1000W Power amplifier TP2350B

Have you ever needed to power a 12-volt relay in a circuit but only had 6 or 9 volts available? This simple circuit will solve that problem. It allows 12-volt relays to be operated from 6 or 9 volts, or 24-volt relays from 12 volts. While most normal relays require the manufacturer-specified coil voltage to reliably pull the contacts together, once the contacts are together you only need about half that rated voltage to hold them in. This circuit works by using that principle to provide a short burst of twice the supply voltage to move the contacts and then applies the available 6 or 9 volts to the relay to lock the contacts in place. With reference to Figure A., when the main supply is applied to the circuit the 220-µF capacitor, C1, charges quickly to +6 volts through resistor R3. The circuit is now awaiting voltage on the control input. When a control voltage (can be as little as 3 volts) is applied to the control input, transistor T1 switches on. The other transistor, a BC558, is a...

The circuit described here is a step-up converter to drive 20 LEDs, designed to be used as a home-made ceiling night light for a child’s bedroom. This kind of night light generally consists of a chain of Christmas tree lights with 20 bulbs each consuming 1 W, for a total power of 20 W. Here, in the interests of saving power and extending operating life, we update the idea with this simple circuit using LEDs.  Power can be obtained from an unregulated 12 V mains adaptor, as long as it can deliver at least about 330 mA.  The circuit uses a low-cost current-mode controller type UCC3800N, reconfigured into voltage mode to create a step-up converter with simple compensation. By changing the external components the circuit can easily be modified for other applications. To use a current-mode controller as a voltage-mode controller it is necessary to couple a sawtooth ramp (rising from 0 V to 0.9 V) to the CS (current sense) pin, since this pin is also an input to the internal PWM com...

Powering up my twin digital Sony DSC-V1 cameras at exactly the same time frequently synchronizes the cameras to a remarkable degree, within milliseconds. The cameras are powered up by twinned Sony wired remotes by shorting the ACC port LANC signal conductor with the ACC port ground. With experimentation, I find further that the synchronization can be refined to within microseconds visit page. via next.gr Stereo Digital Camera Power-up Pulse Generator

The circuit described here is a step-up converter to drive 20 LEDs, designed to be used as a home-made ceiling night light for a child’s bedroom. This kind of night light generally consists of a chain of Christmas tree lights with 20 bulbs each consuming 1 W, for a total power of 20 W. Here, in the interests of saving power and extending operating life, we update the idea with this simple circuit using LEDs. Power can be obtained from an unregulated 12 V mains adaptor, as long as it can deliver at least about 330 mA.  The circuit uses a low-cost current-mode controller type UCC3800N, reconfigured into voltage mode to create a step-up converter with simple compensation. By changing the external components the circuit can easily be modified for other applications. To use a current-mode controller as a voltage-mode controller it is necessary to couple a sawtooth ramp (rising from 0 V to 0.9 V) to the CS (current sense) pin, since this pin is also an input to the internal PWM comparator. ...