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2Instructables8,000Views8CommentsCampinas, BrazilJoined November 7th, 2015
I am an Electrical Engineer interested mainly in electronics and embedded programming. My professional experience is related to HDL applied to FPGAs or SoCs (HPS/FPGA). I also have skills in high-level programming languages such as C/C++ and Python.

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  • gleisonstorto commented on GreatScottLab's instructable DIY Constant Current Load2 months ago
    DIY Constant Current Load

    1. It does that. When VBAT is lower than output of RV1, U1B always outputs GND to the gate of Q2. Q2 becomes an open circuit. I have tested with a cut-off of 3V, and the current between J2 terminals is lower than 10mA.2. It depends on what you want to do. If you need really precise discharge current, thermal cut-off, high discharge currents, you may need to modify the circuit.

    I have replied to your questions ;)

    1. It does that. When VBAT is lower than output of RV1, U1B always outputs GND to the gate of Q2. Q2 becomes an open circuit. I have tested with a cut-off of 3V, and the current between J2 terminals is lower than 10mA.2. It depends on what you want to do. If you need really precise discharge current, thermal cut-off, high discharge currents, you may need to modify the circuit.

    1. You are right, but they didn't have the IRLZ44N at my local electronics shop.2. I don't know what you mean. You want to discharge up to cut-off voltage to evaluate its capacity and at the same time, don't overdischarge and damage your cell. I am attaching a typical discharging curve of a 18650 cell.

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