See the attached file
I have only basic electronic. Help me to understand the circuit.
1. The circuit is a constant current or a basic led circuit(DC converter + resistor + led)? If the circuit is a constant current, why? It looks like DC converter + resistor + led.
2. The 1st circuit doesn't have output capacitor and it work(tested by the circuit creator). Which one is better, using and not using output capacitor?
3. The 2nd circuit: 'current setting with R1: by the bias of the FB connection with D1 and D2 is the typical voltage drop of 0.2 R1'(using Google translate).
I=(1.23-0.6-0.6)/R1 => I=0.03/R1 is this correct?
4. The 1st circuit using 1K resistor and 2nd circuit using 47K(R2). How to calculate the resistor?
Thank you
I have only basic electronic. Help me to understand the circuit.
1. The circuit is a constant current or a basic led circuit(DC converter + resistor + led)? If the circuit is a constant current, why? It looks like DC converter + resistor + led.
2. The 1st circuit doesn't have output capacitor and it work(tested by the circuit creator). Which one is better, using and not using output capacitor?
3. The 2nd circuit: 'current setting with R1: by the bias of the FB connection with D1 and D2 is the typical voltage drop of 0.2 R1'(using Google translate).
I=(1.23-0.6-0.6)/R1 => I=0.03/R1 is this correct?
4. The 1st circuit using 1K resistor and 2nd circuit using 47K(R2). How to calculate the resistor?
Thank you