Puggy Potty Alarm

A

Alun

Jan 1, 1970
0
The turns ratio of a transformer (and also its voltage step-up ratio) is the square-root of its impedance ratio!
Oh I remember now from college, I must've been half asleap in that lesson! ;D

I would work well from 9V, if the maximum peak voltage the piezo can stand is 30V then then would be the peak-peak output would be 38V or 19V peak so it would be perfect.
 
Last edited:

CRE

Nov 20, 2004
61
Joined
Nov 20, 2004
Messages
61
:-\ whoa..... umm, yeah what that other guy said.  :eek:


Err, ok, well backing up a few posts, I'm sure the two 9v's in serial didn't fry the cap as I hadn't even used them when that prob occured. It may have fried one of the IC's granted, but as I said, I tested the voltages and they were putting out only about 15v combined, but admittedly I tested them without a load. I think it's more likely that I miplaced a jumper.... I tend to do that.... fortunately enough I only tend to do it on the first circuit and not any to follow.  :p

I'm gonna go through and trace the circuit tomorrow.... hopefully it is just a misplaced lead and not a fried IC or two. I am interested in the complementary pair suggestion though, if the output is higher it should be exactly what I'm looking for.

One of these days I need to either find out how to read and understand the values of transformers that I've found at suppliers'..... or learn how to start wrapping them myself.

At any rate thanks! and I'll be sure to post once I get this initial one debugged.

 
Top