I will appreciate very much if you explain us the function of TL431 in wich the cathode is connected to the ground of 7805 regulator and the reference voltage is conected to a volage divider between 7805 output and ground ; so the 7805 output can deliver between 1 to 5 volts by changing the value of the voltage divider ,This circuir appears in the Forrest Mims Engineer's Notebook Thnak you very much
The TL431 is never connected to the ground via the cathode. The cathode and ref are connected together, then connected to the GND side of the 7805. This creates a 2.5V reference. The anode then goes to the ground.
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Very good video, as always. I really like the cable management, with the wires zip tied around the capacitor.
Thank you sir for teaching us about beginner electronic circuits 😊
Merci, i will try it.
Have fun!
👍👍👍👍👍👍
Nice story, but complex.
You could take a look at the l 200 regulator.
Greetings pe1krx
Related links:
www.bristolwatch.com/ccs/tl431_ccs3.htm Power TL431 Constant Current Source Circuits
www.bristolwatch.com/ccs/lithium_charger.htm TL431A Lithium-Ion Cell Charging Circuits
www.bristolwatch.com/ccs/lithium_charger2.htm Charging Multi-Cell Lithium-Ion Battery Packs
www.bristolwatch.com/ccs/tl431_ccs1.htm TL431 Over-Voltage, Under-Voltage Detector Circuits
www.bristolwatch.com/ccs/tl431_ccs2.htm TL431A Constant Current Source Working Circuits Demo
TH-cam:
th-cam.com/video/PvhyJXUhlKI/w-d-xo.html TL431 Under-Voltage, Over-Voltage Detection
th-cam.com/video/y2gnZ7HZefc/w-d-xo.html TL431 Constant Current Source Circuits
th-cam.com/video/kJUit6XQYKE/w-d-xo.html TL431A Lithium-Ion Cell Charging Circuits
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th-cam.com/video/Fr0Zir8UCLs/w-d-xo.html TL431 10-Volt Charger Short Version
th-cam.com/video/gg0Tux_pAgk/w-d-xo.html Charging, Charge-Balancing 18V Li-Ion Battery with TL431
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I will appreciate very much if you explain us the function of TL431 in wich the cathode is connected to the ground of 7805 regulator and the reference voltage is conected to a volage divider between 7805 output and ground ; so the 7805 output can deliver between 1 to 5 volts by changing the value of the voltage divider ,This circuir appears in the Forrest Mims Engineer's Notebook Thnak you very much
The TL431 is never connected to the ground via the cathode. The cathode and ref are connected together, then connected to the GND side of the 7805. This creates a 2.5V reference. The anode then goes to the ground.
Sorry ,the TL431 cathode is connected to the ground connection of the 7805 (pin 3) .Can I send you an email with the circuit diagram?@@LewisLoflin
You said ground. That is correct, the cathode connects to the 7805 ground pin.
It doesn't need a voltage divider to act as a 2.5V ref.
You are right, my bad.