Velleman VM152 ユーザーズマニュアル
23.04.2010
©Velleman nv
2
Note:
Originally the PCBs holding the LEDs were copper coloured. New generation LED strips have white coated
PCBs, which give a more uniform light distribution.
PCBs, which give a more uniform light distribution.
2) Determine the length and the nr. of LEDs per meter
Standard LED strips have a length of 5m and contain a number of series and parallel connected LEDs. This
design enables you to cut the strip every fixed number of LEDs; the places where the strip can be cut are
clearly marked on the strip.
Cut‐off parts of the strips are not wasted as it is possible to solder new power supply wires to these cut‐off
parts.
design enables you to cut the strip every fixed number of LEDs; the places where the strip can be cut are
clearly marked on the strip.
Cut‐off parts of the strips are not wasted as it is possible to solder new power supply wires to these cut‐off
parts.
Also LED strips may have a different amount of LEDs per meter. Most common are LED strips with 30 or 60
LEDs per meter, thus a standard length 5m LED strip is available with 300 or 600 LEDs.
Which amount of LEDs is better for your application can be determined by following factors:
More LEDs per meter:
LEDs per meter, thus a standard length 5m LED strip is available with 300 or 600 LEDs.
Which amount of LEDs is better for your application can be determined by following factors:
More LEDs per meter:
More light output, more uniform light distribution – better for direct lighting
Higher current/power ratings which has impact on heat, total length, power supply and controller
Higher current/power ratings which has impact on heat, total length, power supply and controller
Less LEDs per meter:
Less light output, more dispersed light distribution – especially suitable for indirect lighting
Lower current/power ratings which has impact on heat, total length, power supply and controller
Lower current/power ratings which has impact on heat, total length, power supply and controller
Is it possible to interconnect LED strips to create longer distances?
Yes, but keep following limitation in mind:
Each LED strip will consume the same amount of power. If LED strips are interconnected the total power and
thus current trough the LED strips increases and this current is limited by the design of the strip (check the
LED strip data sheet for ratings and limitations).
Each LED strip will consume the same amount of power. If LED strips are interconnected the total power and
thus current trough the LED strips increases and this current is limited by the design of the strip (check the
LED strip data sheet for ratings and limitations).
Example:
You need a total LED strip length of 20m blue LED strip with 60 LEDs per meter (Velleman CHLS3B). It would
seem logical to just interconnect four full length strips of 5m to reach 20m.
In the data sheet you find that a single CHLS3B needs a 12Vdc supply and draws 1.5A current (18W power).
If current or power is not rated use Joule’s law: Power (W) = Voltage (V) x Current (A) or Current (A) = Power
(W) / voltage (V).
If you interconnect 4 strips the power increases to 4 x 18W = 72W and current increases to 4 x 1.5A = 6A.
This current must pass through the first strip to reach the last strip. Due to design limitations, the tracks
inside the LED strip can only take about 4A without being irreversibly damaged, which limits the total length
to 10m (2 x 1.5A = 3A) of LED strips. The solution is to interconnect two times 2 strips, and connect these
separately to the controller or power supply. To determine the power supply or controller refer to §4 and §5.
seem logical to just interconnect four full length strips of 5m to reach 20m.
In the data sheet you find that a single CHLS3B needs a 12Vdc supply and draws 1.5A current (18W power).
If current or power is not rated use Joule’s law: Power (W) = Voltage (V) x Current (A) or Current (A) = Power
(W) / voltage (V).
If you interconnect 4 strips the power increases to 4 x 18W = 72W and current increases to 4 x 1.5A = 6A.
This current must pass through the first strip to reach the last strip. Due to design limitations, the tracks
inside the LED strip can only take about 4A without being irreversibly damaged, which limits the total length
to 10m (2 x 1.5A = 3A) of LED strips. The solution is to interconnect two times 2 strips, and connect these
separately to the controller or power supply. To determine the power supply or controller refer to §4 and §5.