I just realised I watch these videos not just for the accent, but the amazing dexterity in holding the board and solder with one hand.

I was a bio-medical electronics tech for nearly fourty years, and Big Clive is teaching me more of my trade than I ever knew before. Well done Clive.

I have to admit, this was *far* easier than I expected when I read the title of the video. I saw the title and thought it was going to be too complicated to be worth the effort, but as it turns out, it is quite simple. Thanks!

I have been contemplating a project that needs this exact function, so your video is perfectly timed. Thanks!

I know nothing about electronics, but I still keep watching your videos..

@retro80s22

7 жыл бұрын

you too will become addicted. I'm learning everyday And big Clive was the catalyst ☺

@grandadpop7865

7 жыл бұрын

+retro80s I've learned so much from Clive's videos.

@retro80s22

7 жыл бұрын

+Grandad Pop big Clive is a great guy I've purchased several of his pcb projects and they learn you enough and are fun and quirky when completed. keep up the hobby and enjoy .The thing I've found out about electronics is the hobby can easily last you a dozen life's and you'd still have plenty left to learn .

@retro80s22

7 жыл бұрын

+therealnightwriter oh dear I'm illiterate. I struggle to spell words like suck my hairy ring piece.This ain't count down

Thank you Clive. I had no idea that some of these PIR sensors would accept an LDR.

Thanks a lot for that very useful tip. Wasted a lot of time, unsuccessfully, trying to link an LDR and a PIR circuit externally until i came across your tip and it then worked perfectly

To revert back to using the PIR module in daylight 6:18 just put some black electrical tape over the LDR.

@dashcamandy2242

7 жыл бұрын

You could leave the pins a little long on the back of the PCB and use a spare computer jumper block to enable/disable the LDR.

Ever since i saw the toilet led light I have wanted to make one that turns on using PIR but only when its dark. This would be just the ticket and will save hours of coding a micro controller. Thanks!!

@eleanorhathaway927

7 жыл бұрын

I was being sarcastic. I already have the code from a previous project, this just means i dont need to use it or a microcontroller cutting costs

Thanks for the clarification! I found in many datasheet that this motion sensor "gets better sensitivity in dark environment with adding an LDR"..., but I can not found the appropirate resistance values for this LDR what I should add... Now, thanks for you it became clear, that adding an LDR will not increase the motion sensation performace, it makes the whole module a "darkness & motion" -sensor what is absolute unwanted in my usecase (I have to sense motion in daytime and nighttime too.) Thanks!

🙂Thank you so much for posting this! I'm just getting into messing around with electronics. I love the idea of letting my imagination run wild with fun ideas like this! I'm actually very handy with home construction and building motorcycles, so for me adding my own twist with electronics into those applications will be great. Thanks again, cheers from NYC ✌🏻😎🍻

Thanks for this Clive. I've just ordered mine to add the LDR for a porch entrance light

I have found using a 100k resistor in parallel with the 1m resistor turns the lights on around the same time as my solar lights come on

sweet !!! have been using external LDR with transistor , now all in one !!! great thanks.

It seems to me all you would need is an LDR, a resistor and a small MOSFET to turn on and off the lights. Connect to light string anode to +12 through an appropriate resistor, to the drain of a TO92 enhancement mode MOSFET, a large resistor to GND from to the source and the source to GND, the gate of the FET to +12 V through a large resistor. when the LDR "sees" light it it is low R, and shunts the voltage on the gate to GND, shutting off the FET, and when ther is low light, the LDR is high R, and the gate turns on, with the LEDs turning on. A FET like this sells for 25 for $2

@SuperFredAZ

7 жыл бұрын

and cost, 2 resistors and a MOSFET would cost about $.25 or less.

Sweet idea to make it turn off during daylight hours!!!! You have some really great projects and interesting and entertaining videos!!!!

I was thinking you could disable the LDR less permanently by sticking a bit of black tape over it... in fact since LDRs are so cheap they could solder one on in the factory and stick a bit of black tape over it for the end user to remove if required. occurred to me that the likely fault in that plan would be the cost of having a person sticking tape on things outweighing the cost of components and pcb assembly.

Try adding a light sensor to a Fanny Flambeaux doll. LOL.

@ThatGuy-nv2wo

7 жыл бұрын

But it's manually triggered ;-;

@xerejuneseve6333

7 жыл бұрын

Chucky blinking eyes ?.

I wish that things here in Brazil was this cheap. Sorry for the bad english. Nice project.

Technically clueless eco-hippies...couldn’t have said it better. Subscribed!

Hello, Did someone tried with GL5537 ?

I wonder if a 5 megohm potentiometer could be added to adjust the desired sensitivity?

I wired mine so the LDR is separate from the PIR so that the PIR still notifies me when someones walking around my porch, but does not turn on the lights at day. At night it also functions a automatic light. But I noticed that the PIR causes interference with the LDR when the the PIR triggers. Will have to update the wiring it seems...

Fantastic Video Clive. Very Cool. Keep up the great work. Nick.

Neat little mod, could be useful in a home-made a bathroom light for those night time visits to the throne... :P

It is what I need. It is super simple. Thanks for video. Good work

LDR 5549 working well !

Couldn't you just put a bit of tape over the photo resistor to turn it back to normal?

You could even cut the PCB trace leading up to that LDR and put a tiny switch inline, so you can turn on and off the darkness mode :P This could be handy for a small battery powered door keyhole illuminator :D

I have a couple of those modules. I just need to hunt down what I did with the bag of LDRs that I have. I need to organise all my stuff.

Hi Clive, I'm a electronic noob. The project I have in mind is to build a 2x18650 PIR light that turns ON only during the night. Problem is there are external light pollution, so I gotta have a light-sensitivity adjustment function. [1st qns] You had talked abt adding a variable resistor in parallel to the 1M-ohm resistor to enable adjustment of the light sensitivity. I needed this function to adjust the light-ON triggering point. Searched ebay but seems like 10M-ohm variable resistors are rare and expensive. Are there any cheaper alternatives to add in this "light sensitivity adjustment" function? [2nd qns] for the LDR, is there any particular model to look for? I think not all LDR are the same rite? Thanks in advance!

You saved my life, thank you so much! ❤

Thank you very much for that info. i was always looking for that feature! really helpfull. superb.

Clive, could you make a video about inductors?

Is there is a specific LDR needed for these PIR modules? There are so many to choose from!

the same can be done to the smaller ones, but they may need a trace cut.

Amazing and so simple. And it works. Thanks. I found taht mosfets in 30s + mode give smaller output ad light is darker from 5v source

@bigclivedotcom

4 жыл бұрын

For low switching voltage you need to use logic level MOSFETs. They have a much lower gate voltage.

@Petardozord

4 жыл бұрын

@@bigclivedotcom I'm using Irfz44z mosfet. It works pretty well, but wnen i'm turning knob of PIR to work more than 10 seconds - then it's light is much weaker. So it's pir's fault. Seem like it has different resistance. i'll try add different resistor.

Halloween is coming. So an in darkness, motion sensing light string should be accompanied by some sort of medium-high pitched recording of the Wilhelm Scream...and perhaps actuated skeleton arms..

Hi, I have a doubt. By placing the LDR, the two things work simultaneously? . I mean that if first the light sensor prevails and then the movement sensor. Can you make the light sensor prevail and if there is not enough lighting come into operation the movement?

Great. I was looking this function for my project. thank you

Awesome video. Thanks. There is so many half thought out items coming out of china that could be so much more useful or actually work by adding a few components.

@jonathansmith907

7 жыл бұрын

How is this a half thought out item? It works very well and is quite cheap. Plus it has provisions in the way of solder pads to expand the functionality. Too many people are too quick to bash things made in China as being inferior. We make some crappy stuff here in the US too.

perfect. just the thing I was searching for! thanks :)

Awesome, just what I was after! Thanks a lot, will try this out

@davidficko6100

3 жыл бұрын

@LostlnLeiden did you make it?

If i add a light sensor to a PIR module to control a lamp , but i want to know when dark, and have a motion, the lamp is on, Is the light of the lamp affect the LDR and turn off it??? Thanks

I have a circuit in which I have motion sensor with 5V and 220V bulb, can I use this all with that circuit?

Nice video Clive! Question: I'm assuming that u used a GL55 series LDR, can you figure out which one (e.g. GL5516, GL5528 etc.).

@Friendroid

7 жыл бұрын

i have modded these PIR before with GL55

@javierpallalorden

7 жыл бұрын

Friendroid Nice to hear, but can you tell me if it was a GL5516.....GL55xx?

@Friendroid

7 жыл бұрын

i will reply to you later or tomorrow, as the datasheet is in my home computer. I remember checking the resistance of the LDR when dark, them confirming the serial number in the generic datasheet so i could buy another bag, however i cant remember the serial number now.

@bigclivedotcom

7 жыл бұрын

Not sure the exact type, but its dark resistance is off the range of a meter that can read 20M.

@JohnBailey39

7 жыл бұрын

Just tried it with a GL5537. Worked fine.

hey.. rather cover the ldr with electric black tape... if you have a project that requier it to run at day light?

can you provide a description of this added module with resistors and transistor?

If we use 9V battery in this to power RED Led, how long should the battery last ( in the situation where we want to use LDR)

Great tutorial Clive, Very interesting... :)

I'v never heard a one of those light sensors called a LDR before. That's odd. They'v always been called a Cadmium Disulfide Photocells/Photoresistors when I'v seen them.

@EvenTheDogAgrees

7 жыл бұрын

Light dependent resistors, apparently. But yeah, we call 'em photocells as well. Or simply "light sensors", as in the title.

Are you ever going to use your nice snips? Every time you solder a component I wonder if this will be the time you use the nice snips.

@bigclivedotcom

7 жыл бұрын

I reserve them for the tasks where the very flush cut will be appreciated.

@grandadpop7865

7 жыл бұрын

Surely that would be the nocturnal poop illuminator?

Love the RoFS acro! :P

Nice tip I did not know one could do it - Your video explained it well. On a different note: Can you reduce the minimum "delay time" from the default 5 secs to even lower ? Appreciate a reply.

@bigclivedotcom

4 жыл бұрын

If you look up the datasheet for the BISS0001 chip you will see that there are timing components that can be changed.

Thanks for sharing...

Hi Clive, How can I use 2 PIR modules with one LDR, where either PIR will turn on the LED string? I want to put an LED strip under the stair railing, with a PIR on each end. So the light will turn on when I am at either end of the stairs. Thanks!!

@bigclivedotcom

7 жыл бұрын

Just use one PIR per unit, and for the combined switching you could have one transistor per unit, but common them so either will bring on the light.

What is the specs of LDR ? I am trying to use a 5539, but it isn't working. It only disables motion sensing when the light is very clear, like when I am pointing a flashlight to it.

@bigclivedotcom

3 жыл бұрын

Try some common small LDRs from eBay. You can also nudge the intensity threshold by changing a resistor that forms a divider with the LDR.

@w35l3y

3 жыл бұрын

@@bigclivedotcom I changed the LDR. The old one was varying from 1K to 2M. The new one varies from 4K to 53M. It started detecting motions at about 5 PM local time, nature light. Thanks.

Had a look at my PIR, same looking model, but mine has two set of pads, marked : "RT" and "RL"

@grandadpop7865

7 жыл бұрын

Mine too, if anyone knows what the RT pads are for, please share with us unenlightened :)

@lucput6982

7 жыл бұрын

RT is for a thermal resistor. You can trigger the sensor at a certain temperature. The RL pad is for the LDR, a nice tip put a potmeter over "R2" on Clive's shematic. This makes it easier to trigger

@grandadpop7865

7 жыл бұрын

+Luc Put Thank you :-)

@seasidescott

4 жыл бұрын

@@lucput6982 Would the thermal resistor be a PTC or NTC type for freezing or too hot temperatures? (Just now learning about this) Like if you wanted a heat lamp to come on only if temperature were below a certain temp? Any recommendation on this would be great.

Thank you

Is there any chance to get this working 24v dc power supply

@bigclivedotcom

2 жыл бұрын

Depending on the regulator it uses it may work at 24V.

Hi I am not an expert in electronics/electricals, I need help on my solar lamp post. During daytime, it automatically switches off. But comes night, it doesn't turn on automatically. It comes with a remote control that I can switch on manually. What could be the problem? Can I rig the remote control and add a photoresistor LDR and put something to press and hold the ON button? Where can I connect the LDR in the circuit of the remote control? What is the specs of the LDR? The remote is powered by just 3v 2x1.5AAA battery.

Thanks alot, very easy and very good hack!

Do the light sensors trigger on IR light? I have plans to use the PIR module with a Raspberry Pi and an IR camera with built-in IR LED lights to detect motion, take a photo and then email the photo.

@bigclivedotcom

7 жыл бұрын

No. They detect longwave IR from body heat.

Thank you .Useful information.

My PIR sensor with the LDR doesn't sense motion anymore and only light the LED when it is dark. I want the PIR sensor to detect motion to light LED when there's daylight and just light the LED when its dark. Does soldering in the LDR disable the motion sensing?

@bigclivedotcom

7 жыл бұрын

+Andy Chiu Removing the LDR will make it look dark all the time.

I have this working but mine comes on too early, when it's still quite light outside, can I add a potentiometer and where would I add it?

@bigclivedotcom

7 жыл бұрын

Is it possible to aim the sensor so it gets exposed to more light? Failing that you could bridge the resistor I mentioned in the video with a suitable resistor to make the unit less sensitive.

@jonathansmith907

7 жыл бұрын

No, I can't get more light into it. Also, I need it to be more sensitive, not less don't I? Right now it's coming on too soon, I need for it to wait until it's darker before it comes on. Thanks!

That's brilliant to know . I bought x 10 of the pir sensors for 3 quid.

It's really an amazing feature

Thank you, good to know it is ready for LDR. I am working on a DSLR camera trap and I wonder, how to reverse its operation - only trigger when there is enough light. Any thoughts? :)

@bigclivedotcom

2 жыл бұрын

Yes. The light sensing circuitry is formed from a bridge of the sensor and a resistor. Swapping their roles and adjusting the resistor value to get the desired threshold should work.

Hello sir, I’m very interested in doing this, but I’m actually a beginner. Is there anyway to help me with the cable wiring you are using, or anybody else, who made it. I need help with components you are using.

Could one make it only turn on in the presence of ghosts?

Playback stuttering far more than normal. Requires manual button push. Space for adverts perhaps?

@cardboardboxification

7 жыл бұрын

Cashpot its not the internet, it's your internet provider, maybe it's that time of day where a million kids are playing games online

Sir what do you call to that connector in pir module? Thanks

is it possible to make these re-trigger? Edit: apparently it's quite easy: there will be three pins (not the power and signal pins) with a jumper on two of them. Just move the jumper to the other pair.

@bigclivedotcom

7 жыл бұрын

There seem to be two versions, one with the link and one with the pads and a track acting as a link. If it's a link then try it in the other position to allow the unit to retrigger continually. If it's the pads then it should already be linked to retrigger I think.

I didn't know those things where made for Arduino, I just use them for what they where made for sensing people or cats in my case.

@mankee2211

7 жыл бұрын

the're just easier to find when you add arduino to your eBay search.

But do i understand it correctly that the lights will only turn on when it's night and somebody is near (movement)?

@bigclivedotcom

7 жыл бұрын

Yes. It still needs to detect movement.

Mr Bigc, totally unrelated, but i have a question, since you seem to have a great knowledge of electronics.. i ordered a " Rotating LED Kit POV Soldering Training Kit" from banggood, and soldered it together, it works. its basically a strip of leds that are rotating and pulsing and making and image, based on the persistence of human vision. however, i noticed that the design have one resistor inline of each LED which is then connected to ground by the IC, why are they simply not sharing one resistor, but instead have one 560ohm resistor for each LED?

@bigclivedotcom

7 жыл бұрын

If more than one LED was on at a time the current through the resistor would be shared and the LEDs would be dim.

@johneh87

7 жыл бұрын

Thanks, that makes more sense in the morning. :)

Does it really works with ldr?? Wow

Hi Clive, wouldnt the LDR be a big current drain when using batteries?

@denimjeans2007

5 жыл бұрын

Hi, I asked me the same question. But looking at 1M with 3.3V and Ohms Law: 3.3V/1.000.000 Ohms=3µA=38 Years with 1000mA LiPo. with 100k approx 3-4years. The sensor (50µA) would suck the battery within 2 years empty without and operation. with 100k (33µA) + sensor's 50µA we are at 1,4 Years. or am I doing wrong calculation?

Hello, I'm not sure if my comment is going to be useful for someone but hope so. So I bought LED Ceiling Light RADAR/PIR Motion Sensor Lamp that has both PIR sensor and light sensor but my hallway has 3 of those lamps, so the problem is when one lights up, the other does not or they light up if they have been triggered at the same time. My solution to that was to cover the light sensor with electrical tape nicely and that way only the PIR sensor works and for the light sensor it is always dark, so they don't bother each other and I can have them all 3 on together. Hope this is useful for somebody.

Will be try

What value LDR did you use ?

@oilybrakes

5 жыл бұрын

The LDR was R_3 in the schematic. 5V/0. 2V = (R_2 + R_3) / R_3 R_3 = R_2/[(5V/0.2V) - 1] = 41.6kΩ In daylight, we want to pull pin9 below 0.2V. When light shines upon the LDR, its resistance diminishes. Less voltage drops across it and we fall below the 0.2V treashold. Thus, if you want to have your PIR trigger in more than complete darkness, you might want to choose a bigger value than calculated, so that more voltage drops across it even though there is still some light there. That is what I think about the value of the resistor.

nice find

haha i have never seen the posibility to add a LDR on it. thanks!

You said you think the power rail is 3.3v and not 5v, but the schematic shows a 78L05 regulator. What regulator is actually used?

@bigclivedotcom

7 жыл бұрын

In the module the rail measured at 3.3V.

@evilutionltd

7 жыл бұрын

rjk ‪ the schematic isn't of the board he is using, it's just a generic layout for that chip.

hi good project it try to do the same soldering a LDR on my PIR Board. It is not working as expected. What kind of LDR do you use? do i have to do extra thing to do it working ? thx

@bigclivedotcom

3 жыл бұрын

Check it has the divider resistor fitted.

@benoitd94

3 жыл бұрын

@@bigclivedotcom you mean that i have to solder LDR and another resistor to get a voltage divider ?

@benoitd94

3 жыл бұрын

if i could i would send you a picture of my PIR Board setup ? do you have an email ?

What is best resistance for Ldr ?

Mine has LDR (RL) and also thermistor (RT) holes.

@bigclivedotcom

7 жыл бұрын

The RT pads appear to be in parallel with a 10K resistor that couples the first gain stage from the sensor to the second. I guess it just varies sensitivity so that it compensates for ambient temperature.

Can you please share link of video you mentioned in which you put together 1 transister and 2 resisters with pir sensor to light the led strip ?

@bigclivedotcom

4 жыл бұрын

kzread.info/dash/bejne/l6qOr5SYgrfchLg.html

@default_youtube_profile

4 жыл бұрын

bigclivedotcom thanks I might have npn transisters i will try

Does the PIR sensor turn off when its day time, or is it still using the same amount of power?

@bigclivedotcom

7 жыл бұрын

It's quiescent current is very low. About 50uA in either day or night standby mode.

hi Clive :) i see on the net that there are 2 pads for a thermal resistor, too, on that module... what is that used for??? Thanks

@bigclivedotcom

6 жыл бұрын

I'm not aware of a temperature sensing function.

@squalazzo

6 жыл бұрын

thanks for the answer :) look here: ozcott.com/NomadTronics/wp-content/uploads/2015/03/PIR-SensorModule.jpg or here: i0.wp.com/dronebotworkshop.com/wp-content/uploads/2018/01/HC-SR501.jpg

Can you tweek the the dwell time? Many ready-mades are almost exactly what I want except they turn off after 30 sec, where I'd like 2 mins. Is there a simple way of modding them? Ta!

@bigclivedotcom

7 жыл бұрын

There are two pots on this type. One for delay and one for sensitivity.

@raykent3211

7 жыл бұрын

bigclivedotcom thanks a lot!

Kool information to know!

Hey Clive what is that 3 pin connector called that you used? I was trying to find those for use in a computer fan project I was working on and I couldn't find the right phases to search on eBay.

@bigclivedotcom

7 жыл бұрын

It's a standard connector based on a Molex style. You have to buy the housing and contacts separately. www.rapidonline.com/jyk-h2500-03-3-pole-crimp-housing-22-0910

@terminashunator

7 жыл бұрын

Thank you!

@ethanpoole3443

7 жыл бұрын

Electro_Leet Specifically lookup the Molex KK series with 0.100"/2.54mm spacing. The contacts are available in 3 different finishes depending upon your application, zinc, phosphor bronze, and gold (with zinc being cheapest). They are wonderful general purpose connectors for projects for everything from signal lines to several amps as power connectors.

Thank you for the video but we still did not have the PIR connected with a 12v led strip !!

@bigclivedotcom

5 жыл бұрын

You can get inline PIR sensors for 12V LED strips.

@fraaggl

5 жыл бұрын

Thank you for the tip, so it mean that you can't use the Pir you show in the vidéo ? Because the inline PIR are very expensive compare to those small modules.

Hi clive. I have a riddle for you. I have ordered a wt588d-u sound module to connect a to my 2p machine and was wanting to use pir modules to instead of switches. The schematic or the wt588d-u shows the trigger pins put out 5v to the ground rail inorder to activate them. How would I connect a pir with that has +5v Sig and gnd pins in a 2pin application

@bigclivedotcom

5 жыл бұрын

You could use an NPN transistor to shunt the inputs to ground. You'd need a 10K resistor from the sensor to the base of the transistor.

@ReverseDeadshot

5 жыл бұрын

@@bigclivedotcom thanks Clive your a legend.

Is there a way to modify the PIR so an Arduino could adjust sensitivity/time ?

@bigclivedotcom

4 жыл бұрын

Sensitivity not easy unless you pulse counted. Time easy if it just triggers a delay in the arduino.

@matskarlsson7354

3 жыл бұрын

@@bigclivedotcom I have found out that pin 8 (RESET) can be controlled by an Arduino digital pin and now Im investigating if I can use a MOS 4066 and just a few resistors in the Op Amp feedback resistors. Inspired by Julian Iletts "Making a PIR Sensor Less Sensitive".

How do you solder anything with that novelty size iron?

@bigclivedotcom

7 жыл бұрын

Effortlessly.

can i change the block time of it?? accually it is written that it can be changed in its datasheet..but i do not know how to

@bigclivedotcom

6 жыл бұрын

The easiest timing component to change is the capacitor.

@minamagdy7675

6 жыл бұрын

+bigclivedotcom thanks but i already know ... it is about which one to change

@zenniz1992

6 жыл бұрын

Block time, Ti = 24 * R * C. You need to check your PIR sensor's schematic to change the R and C value. If your sensor's IC chip is BISS0001, the R and C that affects the Ti is connected to pin 3 of IC chip.

I have spent most of today watching your videos. There epic, especially this one. Never knew you could tweak the cheap PIR sensor form china. Thank you so much for this video. Would love to see a few more tweaking videos of cheap modules from china. :)