tl431

I made a low battery cutoff circuit to monitor my 12v lead acid battery using TL431. I followed the circuit diagram shown below. Sorry for the hand-drawn schematic. I am however not satisfied with the outcome, since I understood with my little knowledge of TL431 that it would work better than a...

hey, I just designed this circuit to cut off battery power when the 6xAAA cells get below 6v. I used a bc547 as an inverter after the tl431 to trigger an LMC555 to go high when the voltage goes below 6v, which then shuts off the p-channel mosfet (IRF4905). I have V+ going to an led circuit like...

I'm looking to get some help in designing a board that takes an input voltage and confirms if the that voltage resides between V = 27.5V and V = 29.5V without an external power source. When the input voltage is between this range I would like an LED to light up. So far I've been exploring using...

I bought a power supply adopter (old, used, made for some device) of 24v 4.5A (from 230vac mains). It is a fixed output psu. My intention is to make it a variable psu of 30v to <=5v (as low as possible, and continuously variable). Schematic (simplified) of its error-amp circuitry is attached...