7-11 July 2014
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=16&confId=34"><font color=#0000ff>SAIP2014 Proceedings published on 17 April 2015</font></a>

The design of a light-emitting-diode pulsing system for measurement of time-resolved luminescence

8 Jul 2014, 17:10
1h 50m
D Ring ground level

D Ring ground level

Board: F.33
Poster Presentation Track F - Applied Physics Poster1


Mr Solomon A. Uriri (Rhodes University)

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Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

A new light-emitting-diode (LED) pulsing system for measurement of time-resolved luminescence will be presented. The system has been designed for use with a set of blue light-emitting diodes as the stimulation light source. The LEDs are pulsed at various pulse width by signals from a 555-timer wired as a monostable multivibrator. The output pulse from the 555-timer is fed into an N7000 MOSFET to produce a pulse current of 500 mA to drive a set of 16 LEDs. This amount of current is sufficient to drive four sets of 4 LEDs with each LED driven at a maximum pulse current of 110 mA. A multichannel scaler (Ortec MCS-plusTM) is used to trigger the pulsing system and to record data at selectable dwell times. The system is designed for use on wide band gap insulators.

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Main supervisor (name and email)<br>and his / her institution

Makaiko L. Chithambo. M.Chithambo@ru.ac.za / Rhodes University, PO BOX 94,Grahamstown 6140, South Africa

Primary author

Mr Solomon A. Uriri (Rhodes University)


Prof. Makaiko L. Chithambo (Rhodes University)

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