Hello everybody.
I'm complete newbie to electronics, yet I would like to build simple and effective bicycle light.
The components are:
1. 1 x 3.7V, 350mAh, 25C LiPo battery
2. 3 x 3.4V, Ultra-bright, 5mm, 18000mcd, 20mA LEDs
3. 1x 22 Ohms resistor
4. 1 x latching switch
My questions are:
1. What is the optimal resistor value and setup (Serial, Parallel.. common R, separate R)?
2. How to keep the voltage steady for 3.4V LEDs (which should be 3.4V, I ques)?
The battery is 3.7V, but when full, it is almost 4.2V, and off course,when connected to LEDs, voltage drops after some time well bellow 3.7V.
Also, with 4.12V, full battery and 22 Ohms resistor, the voltage across the resistor and one LED is 4.06V, more or less.
So, my question is how to keep the voltage steady and keep LEDs working on right voltage while having optimal battery efficiency?
Thanks.
I'm complete newbie to electronics, yet I would like to build simple and effective bicycle light.
The components are:
1. 1 x 3.7V, 350mAh, 25C LiPo battery
2. 3 x 3.4V, Ultra-bright, 5mm, 18000mcd, 20mA LEDs
3. 1x 22 Ohms resistor
4. 1 x latching switch
My questions are:
1. What is the optimal resistor value and setup (Serial, Parallel.. common R, separate R)?
2. How to keep the voltage steady for 3.4V LEDs (which should be 3.4V, I ques)?
The battery is 3.7V, but when full, it is almost 4.2V, and off course,when connected to LEDs, voltage drops after some time well bellow 3.7V.
Also, with 4.12V, full battery and 22 Ohms resistor, the voltage across the resistor and one LED is 4.06V, more or less.
So, my question is how to keep the voltage steady and keep LEDs working on right voltage while having optimal battery efficiency?
Thanks.