LogLED 103

A 3-bit LED driver for flashes and pulses

Cheapest shipping from 10 €
SKU: DEVJ-LOGLED-103
Stock Status: 10 pcs
Delivery Status: 30-60 days
Pre-order item
500 €
Excluding Tax: 127.50 €
pcs

Description

Bright on/off flashes - accurately timed.

103 offers unparalleled performance for simple flashing experiments. Its 3-bit single resistive driver offers 8 flicker-free light levels:

  • 87.5% (relative to the 311/111 max output)
  • 75%
  • 62,5%
  • 50%
  • 37,5%
  • 12,5%
  • 0%
These levels allow using lower powers for prolonged ON-operation (for keeping the LED element cool enough), and a higher power for briefer flashes and pulses.

In all other aspects, 103 is physically and functionally identical, one-to-one compatible and drop-in replaceable with other LogLED drivers. It is our most affordable LogLED light source and is great if 1) smooth adjustment of brightness is not required, or 2) it is acceptable to achieve some smoothing via flicker-inducing PWM-like techniques, via neutral density filters or other optical elements that can adjust light brightness.


Key Features

  • Miniature, easy-to-swap LED elements with active cooling and economical pricing - available in different colors
  • Very bright | Fast switching (some tens of microseconds)
  • Easy control from a PC/SBC/MC over PapaLink (I2C) | Support up to 127 devices
  • Multipurpose BNC connectors to interface with other common lab gear
  • Safe 12 V DC operation
  • Open-source | User modifiable firmware for custom programs

Suggested Applications

  • Optogenetic stimulation
  • Illumination for cameras, specimens and areas
  • Driving photo-chemical reactions uphill
  • Optical information transfer


Extra details about accurate timing




Safety information

General electrical safety principles apply. Pay attention especially on the following factors
  • Never directly view the R30 LED near the max-power. Especially the IR and UV may appear dim to the eye but can cause serious harm or blindness.
  • Prolonged +10 s use near the max-power may overheat the R30 emitter leading to its failure or making it too hot to touch. Do not leave the device unattended when near the max-power.
  • Caution on extreme ambient conditions: At high temperatures above 35°C the device's cooling capacity is lowered and prolonged max-power use may overheat internal components. High humidity over 90% may causes condensation causing several issues such as corrosion and short-circuiting.

Technical Data

Driver type Resistive with 1x 3-bit circuit
Micro-controller Arduino Nano Every (20 MHz)
Firmware PapaLink AVR Device LogLED
LED connector R30 (devjoni)
Power and I2C connector PapaLink (devjoni)
A/B connector BNC (50 Ohm)
Free, unexposed I/O 5 (RX, TX, D13, A2, A3) + USB-SAMD11
Input voltage 12 V (from 7 V to 14 V)
Max-current 2A
Color Black
Material 3D-printed PETG
Dimensions 157 mm x 110 mm x 66 mm (with the M5 leg)
Weight X g
Dimmest flickerless ON values from max brightness
Absolute 12.5% (0.9 log10 units)
Smooth-3%-range Does not achieve
Recommended ambient conditions
Temperature -20°C to +40°C
Humidity 20% to 80%

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