This is a module that allows standard PIR and radar body-detector modules to be used with a standard USB power supply to switch a string of parallel LEDs (or just one higher powered one).
Note that some small modules don't have the output in the middle and will need hooked up with three individual wires. (You can also do that with the other modules if you want more positioning options.)
I used a 2-pin USB connector that in hindsight could have been mounted as a through hole component with the securing tabs also being soldered. It makes it easy to hook up to a USB power bank or plug-in supply. The power bank will need to be the type that puts out a steady 5V all the time without pulsing it or going into a sleep mode.
The PIR modules have a very low standby current and will run for a very long time in standby, but the doppler radar units draw a bit more current for their RF oscillator and a power bank will not last as long between charges in standby. (But still a long time.)
You can connect the common battery operated parallel strings of LEDs to these units, but if the ones with chasing effects are used only every second LED may light due to alternate LED polarities.
The choice of output resistors will affect the LED intensity and run time. The two 10 ohm resistors suggested will give about 100mA which is the maximum recommended for the BC547 transistor.
100mA is good for fairly long strings at good intensity, with good power bank run time.
The doppler unit can see through plastic for outdoor use, but will also pick up ambient foliage movement.
The Giaco maker knife website:- https://giaco.com/
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Note that some small modules don't have the output in the middle and will need hooked up with three individual wires. (You can also do that with the other modules if you want more positioning options.)
I used a 2-pin USB connector that in hindsight could have been mounted as a through hole component with the securing tabs also being soldered. It makes it easy to hook up to a USB power bank or plug-in supply. The power bank will need to be the type that puts out a steady 5V all the time without pulsing it or going into a sleep mode.
The PIR modules have a very low standby current and will run for a very long time in standby, but the doppler radar units draw a bit more current for their RF oscillator and a power bank will not last as long between charges in standby. (But still a long time.)
You can connect the common battery operated parallel strings of LEDs to these units, but if the ones with chasing effects are used only every second LED may light due to alternate LED polarities.
The choice of output resistors will affect the LED intensity and run time. The two 10 ohm resistors suggested will give about 100mA which is the maximum recommended for the BC547 transistor.
100mA is good for fairly long strings at good intensity, with good power bank run time.
The doppler unit can see through plastic for outdoor use, but will also pick up ambient foliage movement.
The Giaco maker knife website:- https://giaco.com/
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
http://www.bigclive.com/coffee.htm
This also keeps the channel independent of YouTube's advertising algorithms allowing it to be a bit more dangerous and naughty.
🤔👌👋👍
Thank you for the video. One question. What’s the purpose of the 1M Ohms resistor? Could have the circuit the same functionality without this resistor? Thank you very much 😃.
I've lurked long enough. "I SHALL" subscribe.👍
My absolute favorite ham-fisted big bear on all of YouTube. Keep up the good work!
If I wanted to add a 6v solar panel and batteries instead of usb where would be best to connect please ?
very nice project
I studied electronics at college. I'd love to do something like this.
This is the kinda thing I want to make for illuminating the cupboard under the sink, Electronics isn't my thing really but I'm always making stuff, I have an arduino electronics kit which I haven't got around to using, guess what my next project is gonna be? Cheers Clive
I did try exactly that, attach some bright LED's to the radar sensor and i failed. After seeing this video i tried again and success! Thanks to Bicclive's motivational power!
I did also attach the LDR (needs additional ldr resistor on backside) so it doesent work during sunlight and now plan on putting it on my TP4056 module solar 18650 cell charger.
Hi Clive can u tell me were to get the USB Pir/Radar modules from please.
Thanks.
Ernie.
Will multiple doppler units fight with each other, given they are active transceivers rather than passive sensors?
.o0(I wonder how many notebooks with engineering art he has laying around!)
I used a sound activated switch (APH-SK370) to turn on outside lights at night the unit is near my car but too far from my front door. I pondered running a speaker to the unit from the front door or even a cord with a bell so I could turn on the lights from my front door. Then today it hit me. I'll just lock my car doors from my remote which will toot the horn & light the lights. Rated for 220 VAC the APH-SK370 also works at 120VAC which I have here.
Hi Clive, is there a JLC dealer in the uk or are you buying from the states? Postage/Customs fees must be expensive
Do you sell those boards or have the Gerber file for them
Hi Clive
I've tried to order some of your pcbs via jlbpcb but on three of them the size box are blank would you be so kind and give us the size please 🙏. Thanks
Instead of a string of lights, would it be possible to use this as a proximity alert device?