I also bought one of these motion detectors and installed it near the back door at work. Its square-waves sound was so irritating that I modified it to produce a soothing sinewave Ding-Dong.
I got a PIR triggered fragrance sprayer for free. The company who makes it gave it away and hoped that I would buy their expensive bottles of fragrance (no way, man!). It uses 3 AA battery cells and can be set to spray whenever it is triggered by motion or by its timer. It also has an LED that blinks when it is triggered.
I got two of them. You can buy a specific channel or by clipping/connecting wires inside select the same of different channel for each.
Why two? My home is very quiet, and I cannot hear someone at the front door, if I am upstairs or in the basement. A single one is pretty sensitive and occasionally detects flying leaves, curious groundhogs and other rodents. So, to avoid the false alarms, mine are set about 20' apart on the front porch. Unless I get two signals, I don't don't run to the front door. They are on the same channel, one receiver is in the basement and the other is upstairs.
hi,
I use these PIR's from Amazon [China], 5v to 20v operation, on board 3.3Vreg,[ Output: ~0v when inactive and ~3v when activated] , the 5 off price is very fair.
The sensitivity and holding time can be adjusted.
Current drain:<65uA.
Detection distance:3--7M(can be adjusted).
Work temperature:-15 to +70 degrees.
hi,
I use these PIR's from Amazon [China], 5v to 20v operation, on board 3.3Vreg,[ Output: ~0v when inactive and ~3v when activated] , the 5 off price is very fair. View attachment 94207
The sensitivity and holding time can be adjusted.
Current drain:<65uA.
Detection distance:3--7M(can be adjusted).
Work temperature:-15 to +70 degrees.
I use these PIR's from Amazon [China], 5v to 20v operation, on board 3.3Vreg,[ Output: ~0v when inactive and ~3v when activated] , the 5 off price is very fair.
Just wondering what other users here are using. I know of two other members here that use PIC's exclusively.
I was using PIC exclusively too until someone gave me an Uno board. I then started to like some of the simplicity of the line of products collectively known as "Arduino".
In fact, i just got a knock off of one board called the "Nano" and the darn thing is only 3/4 inches wide by 1.75 inches long by about 0.3 inches high. It's an entire uC dev board with mini USB connector so it programs directly from the USB port (no other boards required). This one came with header pins optional so you can solder directly to the board or install the headers to use plug jumpers. I wanted it for a more permanent install so i wont install the headers. It's amazing though that it is an entire 328P controller on this small board and no SMD soldering required.
They also have a model now that has a micro USB connector so the total height is probably around 0.2 inches. They also have another model that has no USB connector and programs from another small board that does have the USB connector for programming. That board is even smaller!
Of course i have also built stuff using the lone 328P chip, dip package using ICSP type programming.
I didnt like the idea of the Arduino at first either, but once you have a board it kind of grows on you
I've started dabbling with XC8 on the PIC, and even done a potential manufactured project for a friend in it.
However, I've also bought some Arduino Uno's and Nano's to play with, but not had much time yet.
One reason for the Arduino's was to help with learning C, something I've failed at for decades (I really do hate C ). The Arduino doesn't really give you the choice, so forces you to get to grips with C.