LogLED 311

The true LogLED worthy its name

Unlike most modern drivers based on pulsed operation, LogLED 311 uses a triple parallel resistor-circuit with a 20 MHz micro-controller to drive the LED. It delivers a flicker-free experience in all brightness levels and reacts linearly to changes in the input-power voltage.

Moreover, it covers a massive brightness range from blinding-bright to barely visible. Smoothly, without any visible steps, and with near-instantaneous changes.

You can control the 311 driver from your PC, single-board computer or from any another micro-controller that supports the I2C communication protocol. The dual BNC ports can be used for analog input, hardware trigger or digital output.

311 is powerable from a wide range of DC power supplies (7-14 V, ideal 12V) including linear and switching supplies and batteries. We offer a 12 V / 5A tabletop switched-mode power supply with it.

311 is fully open-source. Its micro-controller can be updated and modified by the user (requires a micro-USB to USB cable and a PC) to generate custom light patterns on-chip for really fast operation. On-chip models and processing can be also used for compensating component tolerances and LED-junction temperatures.

Key Features

• Miniature LED elements with active cooling and economical pricing - available in colors
• Massive dynamic range | Bright
  
• Fast switching (up to tens of microseconds)
  
• Digital control up to 127 devices (OpenLink / I2C)
• BNC to interface with other lab gear (5 V TTL)
  
• Safe DC 12 V operation
• Light and portable
• Open-source | User modifiable
  

Example Applications

• Light activation of sensory cells, organs and molecules in electrophysiology and calcium imaging (flashes, pulses, steps, ramps, sinusoidals, waves, sweeps, noise patterns)
• Reactive light patterns for human and animal subjects
  
• Optogenetics - Activation of neurons and other cells
  
• Photobiology, photochemistry and photophysics (driving photosynthesis, bio-luminescence, photo-morphogenesis and other processes)
• Light source in optics
  
• Illumination for cameras and microscopes
• Industry automation  | Spectral imaging