Something Else

[Fanie]

Electric Door Lock (Pic-less)
For anyone interested, here is an electric remote lock for a door.
Key locks can be picked, hence using a code hopping remote is a lot more secure.
The lock uses an automotive striker motor which drives a couple of 12mm metal pins in or out of the the pane.

The door open/close sensor is a NO reed switch which is activated with a magnet when the door is pushed close.

If the door is closed, the reed is closed and the 2k2 resistor draws about 5mA from the 12V.

When the remote activates the Open (Oop) relay, the motor pulls the pins and the door can be opened by hand.  The remote allows about 1 second for the door to be opened.  You can hear the striker unlocking the door.

If the door is not opened, like when the remote is accidentally pressed, the door will lock itself again, essential, otherwise the door will be unlocked.
The self re-lock happens because when the remote activates the open relay, the 1000uF cap is rapidly discharged through the diode.  When the open relay closes, the 1000uF cap then powers the lock (Sluit) relay which locks the door.

If the door is opened, the reed goes open and the 1000uF cap is discharged by the 2k2 resistor.
If the door is then closed again, the reed closes and locks the door again by the cap charging up through the lock relay.
The 2R2 10W WW resistor is there to extend the striker motor's life.

This locking mechanism is in my front door for more than 20 years.  I did have a pic board in there to do basically the same, with a buzzer that warns every minute or so when the door is left open.  I suspect water got in the board (the wife has a flower pot above it), I couldn't find another board or the code for it between the hundreds of codes, so I decided to replace with the more robust electro mechanical setup.

[Fanie]

How to make a remote remote gate opener.

You need an old phone, its charger, a microphone amplifier and a pic board of course. 
Not all my projects are without pics 

The above gets mounted in a box to filter most environmental noise out.  Hopefully you have 12V from a solar system and that powers your board as well as the phone's charger that is permanently connected.

You program the phone to play a pre-recorded frequency or frequencies when you call the number as a ringtone.  This way you can make he access secure.

The microphone amplifier play to the pic, and you use the counter command to read the frequency or frequencies played by the phone.
No other ringtone or tune will compare, and your pic will not respond or some idiot blowing his 400 dB air horn at the gate will not open.
The pic switch a relay to open the gate (or whatever).  This can even be a water pump at a remote location, as long as there is phone reception.

The pic never answers the phone, so there are no call costs.

You can be anywhere in the world (so to speak) and open the gate for whatever purpose, ie the girl next door comes in to clean the place, your buddy wants to borrow your lawn mower so his wife can mow their lawn...
You can also add someone else's number with the same ringtone to give them access.
All they do is call the number and the gate opens.  Better let the wife have access too.

I made this opener for a friend who lived in a leisure resort.  Every house owner was added to the phone so they have access.  Visitors phone their host and he calls the gate so they can enter.

[Fanie]

The EEPROM saga with the 16F684 was for this project. 
It is a cookie machine for my friend's small bakery.
The dough is pressed through a form that feeds onto a small conveyer belt where it gets cut to length. 
All that remains is to scoop the cookie off the conveyer and place it in a pan.
The small stepper drives the belt, it has a gear which drives the mechanism that cut the dough to length.  The whole concoction was 3D printed and screwed together.


The control panel with control switches and indication of the steppers feed frequency.
I used the Sound2 command to run each motor at the correct speed.
The press speed is 42 Hz to feed the dough at the exact ratio for the conveyer at 300Hz.
Too fast and the dough deforms, too slow and the dough stretches and break.
The down switch riding the piston down until it starts pressing the dough out is 6000Hz, and when the bottom limit switch is pressed, the piston is driven up at 8000Hz and stopped when it reaches the high limit.
Only with a stepper motor that you can run accurately from such low speed (42Hz) to high speed (8kHz).  And Les's fantastic commands.


And this is Phillip filling the pans up. About 26 pans filled in around 15 minutes.


580 cookies in 15 minutes is about 1.5 second per cookie.

[pjdenyer]

Hi Fanie, it's amazing what you can do with a 3d printer and some electronics.

[Fanie]

I don't know how we got by without it.
The 3D printing is awesome, whenever you need an enclosure, part, fitting... whatever, you draw it and print it.

[JonW]

Love it.  Automation gives consistency to the end product; I like the Human in the process; gives it that homemade touch.  He doesn't look like he eats that many, he is pretty thin 

[Fanie]

Ah yes, Phillip is a small guy, but very capable with some things.  A good hunter too.

He is however not technical, if he takes a screw driver in his hand, everyone around flinch.

Years ago he called me, something wrong with his car's starter.  I said take it out, we get an overall kit for it and we will have it working in an hour or two.  He arrived here, very proud of his achievement, with the alternator