Post by victorgrant on Jan 23, 2018 6:37:22 GMT -5
A voltage sensor to control batterys charge level;
A button with two entries that maintain the state like a SR latch i.e. one entry to set it up and another to shut it down. One could make a latch with the gates but it takes so much space for something so useful like maintain the lamp on until the off button is pressed.
A way to decontaminate water using chlorine. I tried to do this passing the water down in a column full of chlorine, but the gas and the water dont interact very well.
I didn't find the right solution from the Internet.