Posts Tagged ‘LED driver’

App note: White LED driver with digital and PWM brightness control in 2mm x 2mm QFN package

Saturday, August 2nd, 2014

An application note from Texas Instruments, white LED driver with digital and PWM brightness control (PDF!): With a 40-V rated integrated switch FET, the TPS61160/1 is a boost converter that drives LEDs in series. The boost converter runs at 600kHz fixed switching frequency to reduce output ripple, improve conversion efficiency,...

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Posted in app notes | No Comments »

Simple LED driver/constant-current source 20 mA

Monday, June 2nd, 2014

Another Instructable by Jan Henrik,  a constant-current source which gives 20mA at the output.  He writes: It is a circuit, which limits the current to 20mA, what allows us to drive any normal led, without calculating a resistor, you can just plug the led in and see it emitting light… Also...

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Posted in how-to, LEDs | 4 Comments »

App note: High power LED driver with PIC12F675

Saturday, September 15th, 2012

A current controlled buck converter for driving high-power LEDs. The PIC12F675 microcontroller has an integrated comparator, which in combination with a low pass filter provides a control circuit for the SMPS. The circuit is based on a buck topology switching power supply using the on-chip comparator peripheral within the PIC12F675...

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Posted in Uncategorized | 1 Comment »

App note: High power triac dimmable LED driver

Sunday, July 1st, 2012

A 20 Watt Triac dimmable LED driver. This is basically a current controlled step-down switching power supply. The circuit is powered directly from mains so be careful with this one.

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MSP430 based 32 LED driver

Thursday, April 12th, 2012

Parker designed a MSP430 based 32 LED driver. His intends to use it as a VU meter, by reading a ADC line with the uC and turning LEDs on and of depending on the calculated VU level. Finished the VU. Changed the name to a 32 LED Driver as that...

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Posted in MSP430 | No Comments »

App note: Current controlled boost driver for long LED strings

Saturday, March 10th, 2012

This reference design from Maxim is a current controlled boost driver designed for long strings of LEDs. Driving many LEDs in series has advantages over driving them in parallel. In a parallel configuration each LED will need it's own current limiting resistor or current control, while the series LEDs  make...

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Posted in app notes | 3 Comments »

A Larson scanner just in time for Halloween

Monday, October 31st, 2011

Here's a project for Battlestar Gallactica fans. Mike developed a Larson scanner, or popularized by the scanning eye of the Cylons. The effect is done by fading LEDs with pulse-width modulation to produce the TV show's hallmark effect. Via the contact form.

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Posted in hacks | No Comments »

Chip powers LED lamps in MR16 halogen bulb systems

Saturday, April 16th, 2011

This driver is used in LED replacement lamps for MR16 halogen bulb sockets. It's compatible with common dimmers: The MAX16840, an LED driver that employs a proprietary architecture to ensure flicker-free, dimmable operation with electronic transformers and cut-angle dimmers. Maxim's patent-pending approach enables the design of retrofit LED lamps that...

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Posted in app notes, Chips | No Comments »

TI intros 16-channel constant current LED driver

Wednesday, February 16th, 2011

Texas Instruments has introduced the TLC59282, a 16-Channel Constant Current LED Driver with 4-Channel Grouped Delay. According to the datasheet, this 24-pin SSOP device allows control of each channel individually controlled via a simple serial communications protocol that is compatible with 3.3 V or 5 V CMOS logic levels, depending...

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Posted in documentation, LEDs | 1 Comment »

PROTOTYPE: Ethernet LED driver

Wednesday, February 2nd, 2011

We're releasing a stalled or abandoned prototype every few days while Seeed Studio is on break. We put a lot of work into these projects, but they're still missing major components and testing. If an abandoned project sparks your interest, we may have PCBs to get you started. The goal...

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Posted in LEDs, Prototypes, web platforms | 6 Comments »

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  • gant: They still have a couple of the more expensive (but still considerably cheap) 5S-I-S01 in stock...
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