I'm looking for suggestions for a simple charging circuit.
Hi everyone. I'm very newbie in electronics. I wanted to do a project like this: I want to charge a 1.5V battery in a circuit fed by 5V DC. I created a circuit with the help of Chat GPT AI 3.5. The 1.5V LED lamp in the circuit actually represents the battery that will be charged. (I couldn't find any other representative instead of the load).
There are 2x 2.2kohm resistors, one 680 ohm resistor, one 1.5V zener diode, one 2N3904 NPN Transistor and a 1.5V LED representing the load in the circuit.
I have 2 questions:
1) I want to charge the battery with 20mA, but when the circuit works, it shows 4mA. How can I increase this?
2) Is there a toolbar or component in SimulIDE that can be used instead of a load in the circuit, such as a battery to be charged?
Hi.
I think you shouldn't trust Chat GPT for this kind of tasks, specially 3.5.
Maybe I'm missing something, but I don't see how this circuit can be an 1.5V battery charger.
Voltage in the battery could go as high as 4.5V.
Is there a toolbar or component in SimulIDE that can be used instead of a load in the circuit, such as a battery to be charged?
There is no rechargeable battery in simulide.
Thanks for your interest. Of course, I don't fully trust AI, but I believe it gives me insight for a beginner. Otherwise, I would have to connect a 175 ohm resistor to the power supply and connect the battery to be charged to this resistor. However, I wanted to use different components. AI also helped in this regard. I tried the circuit in simulation. Worked. I even reached the 20mA level by trial and error with the resistors.
I am sorry that there are no examples such as rechargeable batteries in SimulIDE.
You basically built a constant current source. Search for it, you will find lots of information. Usually the battery will be connected to the collector of the transistor, but this may work as well.