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One point I would like to mention is the circuits which are meant to be drive LEDs. The constant current circuitry can come in handy to save power when multiple LEDs are needed to be driven.

In general it is desired to drive the LEDs with a voltage just close to the forward vorlage drop. The voltage is only needed to bias the LED. The brightness should be controlled by the current through it. A BJT and opamp can act as a simple constant current circuit. The issue is critical when driving LEDs in series or high power LEDs.

Depending on the number of LEDs and the cost or power criteria decision should be made. Leave it as is with the resistor combination. If the power saving is a must, rethink about the whole strategy of supply voltage levels and LED options. Other answers have put light already on low power options.

One point I would like to mention is the circuits which are meant to be drive LEDs. The constant current circuitry can come in handy to save power when multiple LEDs are needed to be driven.

In general it is desired to drive the LEDs with a voltage just close to the forward vorlage drop. The voltage is only needed to bias the LED. The brightness should be controlled by the current through it. A BJT and opamp can act as a simple constant current circuit. The issue is critical when driving LEDs in series or high power LEDs.

Depending on the number of LEDs and the cost or power criteria decision should be made. Leave it as is with the resistor combination. If the power saving is a must, rethink about the whole strategy of supply voltage levels and LED options. Other answers have put light already on low power options.

One point I would like to mention is the circuits which are meant to be drive LEDs. The constant current circuitry can come in handy to save power when multiple LEDs are needed to be driven.

In general it is desired to drive the LEDs with a voltage just close to the forward vorlage drop. The voltage is only needed to bias the LED. The brightness should be controlled by the current through it. A BJT and opamp can act as a simple constant current circuit. The issue is critical when driving LEDs in series or high power LEDs.

Depending on the number of LEDs and the cost or power criteria decision should be made. Leave it as is with the resistor combination. If the power saving is a must, rethink about the whole strategy of supply voltage levels and LED options. Other answers have put light already on low power options

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One point I would like to mention is the circuits which are meant to be drive LEDs. The constant current circuitry can come in handy to save power when multiple LEDs are needed to be driven.

In general it is desired to drive the LEDs with a voltage just close to the forward vorlage drop. The voltage is only needed to bias the LED. The brightness should be controlled by the current through it. A BJT and opamp can act as a simple constant current circuit. The issue is critical when driving LEDs in series or high power LEDs.

Depending on the number of LEDs and the cost or power criteria decision should be made. Leave it as is with the resistor combination. If the power saving is a must, rethink about the whole strategy of supply voltage levels and LED options. Other answers have put light already on low power options.

One point I would like to mention is the circuits which are meant to be drive LEDs. The constant current circuitry can come in handy to save power when multiple LEDs are needed to be driven.

In general it is desired to drive the LEDs with a voltage just close to the forward vorlage drop. The voltage is only needed to bias the LED. The brightness should be controlled by the current through it. A BJT and opamp can act as a simple constant current circuit. The issue is critical when driving LEDs in series or high power LEDs.

Depending on the number of LEDs and the cost or power criteria decision should be made.

One point I would like to mention is the circuits which are meant to be drive LEDs. The constant current circuitry can come in handy to save power when multiple LEDs are needed to be driven.

In general it is desired to drive the LEDs with a voltage just close to the forward vorlage drop. The voltage is only needed to bias the LED. The brightness should be controlled by the current through it. A BJT and opamp can act as a simple constant current circuit. The issue is critical when driving LEDs in series or high power LEDs.

Depending on the number of LEDs and the cost or power criteria decision should be made. Leave it as is with the resistor combination. If the power saving is a must, rethink about the whole strategy of supply voltage levels and LED options. Other answers have put light already on low power options.

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One point I would like to mention is the circuits which are meant to be drive LEDs. The constant current circuitry can come in handy to save power when multiple LEDs are needed to be driven.

In general it is desired to drive the LEDs with a voltage just close to the forward vorlage drop. The voltage is only needed to bias the LED. The brightness should be controlled by the current through it. A BJT and opamp can act as a simple constant current circuit. The issue is critical when driving LEDs in series or high power LEDs.

Depending on the number of LEDs and the cost or power criteria decision should be made.

One point I would like to mention is the circuits which are meant to be drive LEDs. The constant current circuitry can come in handy to save power when multiple LEDs are needed to be driven.

One point I would like to mention is the circuits which are meant to be drive LEDs. The constant current circuitry can come in handy to save power when multiple LEDs are needed to be driven.

In general it is desired to drive the LEDs with a voltage just close to the forward vorlage drop. The voltage is only needed to bias the LED. The brightness should be controlled by the current through it. A BJT and opamp can act as a simple constant current circuit. The issue is critical when driving LEDs in series or high power LEDs.

Depending on the number of LEDs and the cost or power criteria decision should be made.

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