4
votes
Accepted
Can LEDs produce light like incandescent light?
Add a capacitor.
The capacitor stores up charge when the AC voltage is at its highest. It releases the charge as the AC voltage drops back to zero. This keeps current flowing through the LEDs all ...
- 15k
3
votes
Why does current decrease in CC mode before reaching 4.2V in CCCV method for 18650 Li-ion charging?
I had this as a comment but I think it may actually be an answer.
Exactly how are you measuring the current and voltage? If you are using a DMM with a 2A range, it may drop 160 mV at 1.6 A, so the ...
- 811
3
votes
Why does current decrease in CC mode before reaching 4.2V in CCCV method for 18650 Li-ion charging?
The LM2596 you chose is not a charge controller IC, it is a DC-DC step-down converter. It may be suitable as a primary converter for a downstream charge controller, such as a BQ25181 (since you like ...
- 1,969
3
votes
Need help with understanding constant current control circuit
The opamp circuit will drive its output in such a way as to make its '+' and '-' input voltages equal.
The '+' voltage is fixed and controlled by the pot R2.
The opamps output drives the base of Q1 ...
- 15k
3
votes
Why does current decrease in CC mode before reaching 4.2V in CCCV method for 18650 Li-ion charging?
Give or take doubts about whether the regulator is authentic or not, I would assume its output characteristic is not sharply CC-CV.
In particular, that line of SimpleSwitcher regulators use a ...
- 4,818
2
votes
Why does current decrease in CC mode before reaching 4.2V in CCCV method for 18650 Li-ion charging?
The charging current depends on the output voltage of the DC-DC you use as a source, the battery voltage, and the resistances in series with the circuit. That's the output impedance of your DC-DC ...
- 61.4k
2
votes
Need help with understanding constant current control circuit
The way to look at this circuit is to realize that what you're really controlling is the emitter current of Q1, and the way that it's being controlled is by controlling the voltage of the hot end of ...
- 37.6k
2
votes
Need help with understanding constant current control circuit
R3 is necessary to provide negative feedback from the sense resistor R6, so for the pot voltages of 0 to 5 volts, the output current will be 0 to 73 mA. R4 and C1 in the feedback path seem to be a low ...
- 811
1
vote
Cable jack melted
The cable has a resistance, and if the cable and load have a connector between them, there is a contact resistance at the connector. If you soldered the cable to your load, then the connector is the ...
- 111
1
vote
Cable jack melted
Connectors always have some contact resistance, in addition to the inherent resistance of the metals. Over time, as the contacts corrode or become contaminated, that resistance can increase. Wires, ...
1
vote
Digital voltage/current controller for DIY bench power supply
Something that the other answer doesn't address:
Voltage output with selectable voltage and maximum current (0-12V, 0-10A)
Constant current output with selectable current output (0-10A)
Those are ...
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