/diy/ - Do It Yourself

>>1423794
sort of. Pic related effectively turns off the pullup on the - input once the pulldown is turned on by the + input exceeding the - input, ensuring the + input always exceeds the - input and the output therefore stays pulled low until the button is pushed. you might be able to merge R1+R2 into R4+wire depending on how much current your transistor wants, hence the MOSFET

>>1423804
bretty gud, never thought of that

>>1423822
better to add some resistance to ground after the cap, or add some resistance inline. TVs use signal level references embedded in the composite signal which you appear to have bypassed, and you might want to reverse-engineer it a bit more to either bypass the AGC properly or push your green signal into it to provide that reference