Industry News - LED

LED Dimming & Flashing information

09/01/2019

You may sometimes want to create flashing or dimmed displays with LEDs. This is not quite as simple to do as you might think! But we have solutions to make sure you are successful.

To start with, we will consider flashing the more common parallel connected 12V-DC and 24V-DC types of LED that run on constant voltage power supply units (PSU). If you tried to flash these by simply switching the mains supply to the PSU you would have problems: the PSU usually take a moment or two to energise and light the LEDs. Switching them means that the LEDs may not light when you want and there may be damage to the PSU. The LEDs themselves do not like being switched rapidly also. The safer, more effective way of achieving flashing LEDs is to feed them with a Pulse Width Modulated (PWM) signal. This picture shows how this works:

PWM explanation

These pulses are very rapid, so the eye isn't aware of them. We have flashers with PWM outputs - you feed the low voltage supply from the PSU into the flasher and the output from the flasher goes to the LEDs. Like this:

 


RGB controls

18/04/2019

RGB Controls.

At Sign-Tec we have a number of solutions to controlling RGB. From very simple units that are virtually plug and play through to a very powerful "Scarlet" unit that can drive RGB protocol, 0-10V and DMX. Expandle to 250 channels using PWM or of course the normal range of DMX channels with the DMX controller. The slave/expansion units can be mixed to use different protocols if needed

Scarlet comes complete with an SD card and software onboard to create animations, dimming styles and almost anything you want to create with effects for LEDs.

Many other options are available, with wall mounted systems, remote controls etc.

Call us for specialist advice on the best method and equipment to use.01892 783900

 


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