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
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. Although just slightly lighter.
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 OpenLink (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
Extra details about accurate timing
Directly over the OpenLink (I2C) connection, it is possible to control the driver "on-the-fly". Usually, the time resolution here is from 1 ms to 20 ms depending on your OS and its scheduler.
Directly over the OpenLink (I2C) connection, it is possible to control the driver "on-the-fly". Usually, the time resolution here is from 1 ms to 20 ms depending on your OS and its scheduler.
The baseline frequency for Openlink (I2C) is 100 kHz. It theoretically allows 6.25 kHz operation for 2 byte commands when controlling one device.
Over the BNC port, for a trig-in or LED-on/off signal , digital readout can be done within 5 µs - nearly instantaneously compared to the delay setting the LED on/off.
We will quantify and document these limits in more details within the next few months and thank you for your patience.
Technical Data
| Micro-controller | Arduino Nano Every (20 MHz) |
| Driver type | Resistive with 1x 3-bit circuit |
| LED connector | R30 (devjoni) |
| Power and I2C connector | OpenLink (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) |
| Color | Black |
| Material | 3D-printed PETG |
| Dimensions | 157 mm x 110 mm x 66 mm (with the M5 leg) |
| Weight | X g |
