bd13
New Member
I want to make a timer that will ignite an eletric igniter (chemical based) when timer reaches 0 (what else would it do?) I already have the timer, thanks to the dollar store, it is a simple kitchen timer that beeps when the time is up. I know that i can hook up a latching circuit to the speaker terminals to get a steady voltage when the thing starts to beep, and then i make the latching circuit trigger a relay which completes a simple circuit that ignites the igniter. but there is one problem: its too big, i need this whole idea smaller and use less batteries. I need some way for a 9v battery to operate the latching cicuit and also ignite the igniter, or a small 1.5v button battery operate the latching at the 9v just ignite the igniter. and i can't just hook the igniter to the output of the latching circuit because the transistors take too many volts away from the 9v so in the end it can't ignite anything, but alone it can ignite the igniter. i only have a small area to fit this and 80% is taken by the timer and the 9v, i know i can fit a 2 transistor latching circuit in the leftover space but i need to somehow make a circuit between the igniter and the 9v with as little resistance as posible (very little). anyone have any ideas? thanks