How Do I Build a Timer (60-300 Seconds) for My PIR Activated LED Lighting. I'm Building From Radio S

Most hardware stores sell timers to plug your table light into - so that when you are not home it looks like your home - the timer turns your light on at dusk and off whenever you want it to turn off. You can set it on whatever times you want

1. A commutative ring with at most $5$ distinct ideals is a PIR

Suppose $R$ has exactly $5$ ideals and one is nonprincipal, call it $I$. Of course the nonprincipal one still has to be finitely generated (the ring is Artinian), so select a minimal generating set $a, b, ldots$. How many ideals are we faced with already? There is certainly $0$, $I$, and $R$, as well as $(a)$, $(b)$ which are all certainly mutually distinct because you picked the generating set to be minimal. But now consider this: which one of these ideals is the principal ideal $(ab)$?

2. Will a standard PIR work in an area lit by IR lighting?

It will probably work... The PIR ( passive infrared sensor) usually senses radiation in the range of 8-14 microns - your body heat. The IR illumination used for CCTV is usually limited to silicon sensitivity which cuts off at 1.1 micron on the long wavelength end. They do not overlap

3. PIR Sensor with RPi

I use a PIR module setup in the following way and its working quite well.It is even much easier to setup than your connection.They can be powered from 5V and output 3V so can be connected directly to pins on the Pi's GPIO header without any other components. Most PIR sensors can take input from anywhere between 5v to 9v so I think you should be good without the battery too.Change the GPIO number in your script or in the wiring.Hope it helps

4. Will a PIR security light work OK off a 15amp supply or will it cause damage?

the wattage of the lights determines the supply size 2 x 150 watt lights would be ok on 15 amp supply 2 x 1500 watts would not .

5. A commutative ring with unity which is not a PIR has a non-trivial ideal generated by two elements which is not a principal ideal?

No it is not true. There exist rings which have the property finitely generated ideals are all principal. These are called Bezout rings.There are such rings that are not principal ideal rings, and any of those would be a counterexample to this proposition.A specific example would be a nonprincipal von Neumann regular ring, like an infinite product of fields.

6. Can I use PIR HC-06 Bluetooth Module without arduino to send events to Android?

Not with that module, but if you get a different module designed to be a simple remote control (presentations, selfie stick remote shutter, erc) or keyboard (preferably non-multiplexed) you may be able to rig the PIR output to effect a keypress using a transistor or gate. Details would depend on the output characteristics of your unspecified PIR, and whatever the bluetooth module expects in the way of switch wiring.Or yes, you can use a simple microcontroller to send through your serial bluetooth module. Most micros with a moderately stable clock can transmit serial words, encoding them in software even if they lack a hardware UART peripheral

7. Triggering a LED and interrupting it quickly (with a PIR sensor). What do I need for this?

Maybe a 555 oscillator? It can be triggered by a rising edge and the duration of les flash is configurable by a resistor and a capacitor.I do not know if is the cheapest solution but is the most classical approach.

8. PIR Triggering for no reason

Apparently the problem is noise on the PIR power line triggering the PIR. This can be caused by virtually any other device, even the MCU doing something. I have the same problem caused by the MCU going into sleep mode. Some suggest filters on the power line, some get away with delaying re-arming of the PIR until nothing else is happening which could cause a teeny spike. The latter is working so far for me

9. WhicH RAPP€R haD iN$PiR€D you in ur R€A£ liF€? & How?

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