i think its a latching circuit

[donkey]

am hoping to make a circuit that latches. simple design using a peizzo, led and relay. when a switch is activated even if momentarily the circuit closes and stays closed lighting the led and sounding the peizzo. then i want a second switch to unlatch the circuit and reset it. i have a basic plan
http://img860.imageshack.us/i/latching.jpg
when sw2 is closed rlay activates locking closed and lighting the led and sounding the buzzer. when sw1 is press the circuit is opened and the relay unlatches. I hope anyway
forgive the rough diagram but i have no cad program just mspaint

is this going to work? or does anyone have another idea?

 

[davenn]

hi
not sure if its going to work the way its currently wired. I would have to sit and think about it for a while.

hey I dont use CAD programs either just MS Paint, have a look here at a couple of my circuits of what is possible with such a simple program....
http://www.sydneystormcity.com/bastx.htm or
http://www.sydneystormcity.com/harris23.htm

its an awesome drawing program with great potential

Dave

 

[donkey]

am trying to think of what else will do it. your pics look good too. any idea why it won't work? am looking at it and thinking it will work... going to modify it soon. wanna keep it simple as this is my first time at making a circuit.

 

[donkey]

i just want this circuit to lock and make noise and light when sw2 is pressed. then to "reset" it you open switch 1.

 

[davenn]

ok this mite be a bit clearer

cheers

Dave

 

[donkey]

you are awesome... ty

 

[davenn]

you are awesome... ty

haha thanks, but if I could figure out how to show inline images on the forum then maybe I mite be awesome haha

with your piezo... just remember there are 2 types, one that is just a piezo disk, it needs an external oscillator, and the one you need for this project, that has an inbuilt oscillator, so it only needs power applied to it

cheers
Dave

 

[donkey]

i saw a link down the bottom bout img... hope that helps you out somewhat
it is there when i post a reply... very bottom left hand side

 

[(*steve*)]

haha thanks, but if I could figure out how to show inline images on the forum then maybe I mite be awesome haha

See your original post. (I made you awesome!)

I have edited it to include an inline image. If the description doesn't help, you should be able to "edit" it to see what I've done.

 

[(*steve*)]

grrrr I cant see the image you worked on its just the small white box with red X in it

but I can see the coding you did

You must be using a microsoft product

It looks fine from here. Maybe your browser doesn't like displaying .bmp images?

 

[davenn]

You must be using a microsoft product

It looks fine from here. Maybe your browser doesn't like displaying .bmp images?

it displays bitmaps on other www pages including my own www site
thats nutz .... ok I will clean up the first post and get rid of excess images etc

Dave

 

[donkey]

made the circuit now i need to find a switch that reacts to vibration...

 

[davenn]

made the circuit now i need to find a switch that reacts to vibration...

ok I assume to replace one of the switches already in the circuit, which one?

there are pressure mats but specifically for vibration will the unit causing the vibration be a physical vib. activiting the switch (contact), or a sound vibration (non-contact) ?

I googled vibration sensor switch... dozens of links, do the same and see if you can find one that suits your needs

Dave

 

[(*steve*)]

made the circuit now i need to find a switch that reacts to vibration...

Some of these sensors are as simple as a thin piece of metal anchored at one end (which is one connection) and with a small weight at the other. With vibration, the free end moves and makes contact with another terminal. Often there is some form of adjustment to set how close the contacts are when at rest (thus controlling the sensitivity)

 

[donkey]

i had a look at the vibration switches. i wonder if there are any that are adjustable.... to everyone that helped me so far thank you so very much

 

[donkey]

my ideal one will be small adjustable and cheap..... so far this item is costing me $30au and i am hoping to keep it under $50au including the housing... but i guess thats just a dream lol

 

[donkey]

http://img534.imageshack.us/i/switchc.jpg/
i think this is my design for the switch. 1 will be a copper (or other conductive material)cone piece. 2 will be tension springs, i might remake the design later to have the adjustable strengths. 3 is a bolt bar, threaded. 4 will be 2 nuts with a washer in the middle to adjust up and down depending on the vibration sensitivity needed. the reason i am using 2 is so they lock each other in place and don't move. the cone piece and the washer will have the wires attached thus forming a very basic vibration sensor with momentary contacts.
the problem i have so far i s my metal working skills are limited and i have a lack of time so this may take me a few weeks
P.s. i hope this link works

 

[(*steve*)]

This may be simpler.

A and B are your 2 connections.

The thin piece of metal (essentially a flat spring) extending between them (spring steel or similar) is fixed at one end, and has a mass on the other end. A screw adjustment controls how close the B contact is to the spring. Movement (up and down in this case) will cause the contacts to close briefly.

This is probably also quite easy to manufacture too.

 

[donkey]

the switch is going to be mounted down a 50mm pipe. so am hoping that works vertically too lol. i was looking at my design and thought about the simplest protoype. rather than a copper cone i might find some wire, bout 8 strands make them into a cone shape at 45degrees apart.. this may be the basic switch i need. the circuit works very well this sensor switch and then the housing will be my last 2 parts then i will have completed my first idea.... this is exciting to say the least

 

[donkey]

steve or any other mod. i think i have passed the circuit help section of this project but would love to keep discussing it, is there anyway to move it to the projects part of the forums?