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Table of Contents
Summary of Contents for Plexon HELIOS
- Page 1 HELIOS Technical Guide ® www.plexon.com...
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Page 2: Table Of Contents
® HELIOS Technical Guide Contents Introduction Components Overview Charging the HELIOS device Connecting the Transmitter Pattern Generation Setting the Power Output Pulse Parameters Advertised Maxium Power Battery Life Transmission Latency Transmission and Receive Angles Transmission Range and Interference Documentation History... -
Page 3: Introduction
This guide will discuss components of the system, battery life, transmission range, and setting pulse parameters. Components The HELIOS® Kit is for using an infrared-controlled head-mounted LED and consists of the (1) HELIOS IR-Controlled HMLED, (1) IR Transmitter, (1) charging kit, and ceramic sleeves. Overview... -
Page 4: Charging The Helios Device
Charging the HELIOS Device The IR-controlled HMLED has a rechargeable Lithium Polymer battery. When the battery voltage drops below 3.3V, a red LED on the top of the HMLED will start to flash, indicating that the battery will need to be recharged shortly. -
Page 5: Connecting The Transmitter
Connecting the Transmitter The IR-controlled HMLED is turned on by a signal from the Plexon IR transmitter, shown in the images below. In the above image, notice that there is a mark next to the letter“A”. The letters B, C, and D are reserved for future use. -
Page 6: Pattern Generation
CAUTION: In the Channel Settings, you MUST Set Output Device to LASER and set the Output Mode to Voltage (mV). In the pattern Generator, you MUST set the Units to Laser (mV). Failure to do so can cause excessive power levels in the HELIOS Transmitter, resulting in irreparable damage to the Transmitter www.plexon.com... - Page 7 LED to heat up and will drain the battery. Therefore, we recommend that you limit the duty cycle (the percentage of time that the LED is illuminated) to 10%, if possible. 8. In Channel 1’s window, change Pattern Source to Pattern Generator and select Pattern 1 as the Pattern. www.plexon.com Page 7...
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Page 8: Setting The Power Output
Before starting your experiment, you will need to adjust the power output to your desired level. This can be done using the Light Measurement Kit and Plexon Photodetector adapters. For a complete description see the PlexBright Light Measurement Kit guide on the Plexon Website. -
Page 9: Pulse Parameters
Note that above duty cycles of 10%, the maximum intensity begins to drop. Therefore, Plexon recommends keeping the duty cycle below 10%. Referring to the chart below, the 10ms pulse from above is graphed by the red line. Any point under that line should be a good pulse. 46.2mW at 1% duty cycle is well below the red line and is a good pulse. -
Page 10: Advertised Maxium Power
2.3/(15*0.05) = 3 hours. If you double the duty cycle, the battery will last half as long. Again, this is only intended to be an estimate for battery life. This assumes that the pulses are square and succesfully delivered. www.plexon.com Page 10... -
Page 11: Transmission Latency
The HMLED will receive IR light from almost any angle above the plane of the circuit board. The battery blocks a few degrees of reception, and it will actually receive light from slightly below the circuit board on the opposite side. www.plexon.com Page 11... -
Page 12: Transmission Range And Interference
For Sales Support, email info@plexon.com or call +1 (214) 369-4957. Technical Support If after reviewing this document, you would still like to access Plexon’s Technical Support, we are available via several communication channels. You are invited to reach us through email or on the phone:...
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