 hey there guys I just thought I'd just share these got into building some of these little little circuits that do you know just really really basic operations this particular one I've got a bit of power in at the moment this one is a light sensor and it uses a light dependent resistor a variable resistor a transistor tucked away in there oops tucked away down there a resistor here to live that goes in to the LED and basically the way this is set with this resistor is when it detects light it switches on simple not quite sure what I'm going to use that for this could come in handy in the summertime when it gets really warm first thing in the morning and I could have this little circuit and connect it to maybe a fan just to start having some air you know circulating that's the best they've got so far with that I'm not sure I can do this one has a lot more benefit to it this one is the opposite quick demonstration hold this like this turn the lights off the light sensing circuit of course now goes off because there's no more light for that and this dark sensing circuit comes on that's pretty much the same thing with a couple of differences one there's a couple of extra one extra resistor an extra transistor this has two transistors one just things emitting to the base of the other what should I say the collector from the one goes base the other and then from the collector off through the LED through the resistor to the positive rail and then the emitter comes down to the negative rail and that's controlled with a 10k pop there 10 km and this one is just looking for little circuits I've actually got another one here it's got a lot more LEDs on it this is running from a 555 timer chip and I put a little transistor on there as well so I could have more of a load I've not really played around with this to you know get like maybe a hundred milliamp or something running off it I've used BC 548s the transistors on these and I'd say the 555 timer chip but I thought this could come in quite handy for me because where I live I've got a staircase going down to my front door and it's pretty dark down there there's the light is right down the bottom of the stairs and so when I go to go downstairs all the lights are off upstairs and it's dark because I can't see down there so I thought a little circuit like this and I had it running while with a battery I just set it up in the variable resistor there so it came on and went off with sensitivity by using this battery so what I'm going to do is I've actually got like a little tiny little tiny board and I'm going to put this into practice I'm gonna build the little circuit on there I'm gonna put an elastic band around this and connect it on oh you can't see it elastic band around here and connect it on and I'm gonna actually put it down down the bottom of stairs I'm gonna charge the battery up using my power supply and I've actually got some special charger circuits coming for these so I can just plug them in USB and it'll charge this and we'll let it discharge any further than what it's supposed to keep it healthy and then I'm gonna put it down the bottom of stairs I'm gonna set it up so it actually comes on at night but I'm gonna add a little tiny bit extra to it I'm gonna add a PIR so it'll only come on when it detects you know somebody there rather than have it just come on at night but if it's not like it won't illuminate the PIR sensor and if it is nighttime of course it will and yeah so that's gonna be a little thing that I build and I'll show you when I've done that you won't be sure I got these little PIR sensors so turn it up again brilliant you know I'm doing this because like I say I'm sort of a brand new to this hobby and I want to build the simplest of circuits and you know we're at my way up even though you know I started off with the Slayer Exciter and Jacob's Ladder and bits and pieces I think these can be more fun in a way because you can do a lot more you can tear it down and build and I'll tell you something else as well what you might want to look out for if you're planning on doing any sort of breakboard socket board type little projects is there are some differences with the socket boards I'm going to point out because I think it's in really really good you see this socket board here it's got the little space between all of them and then in the middle it's got a slightly wider space and what that indicates is that these positive negative rails are split which is brilliant because if you've got different voltage little little circuits you can have you know two independent power supplies so you've got four going around the board where on other ones like this one behind it like this one behind it this one isn't split so when I put in a positive negative right the way down the route there's nothing I can do about it no problem physically in there cutting out or something but these ones are split and I tell you what I've got loads of these things one two three four five six seven eight just looking at me and they've all got little circuits on that I've built and I'll probably go through more I've got a brilliant one that I built the other day which is a three-phase sinusoidal signal generator and I get to see the three different phases on my on my oscilloscope first little kit project not to it first little circuit I actually built just to play around with the scope but never mind so yeah that's really handy to know that the ones when you go looking for them when they got a wider split there they mean you can separate you can have you know positive negative there independently positive negative here and that you will I find that really really useful I find it really really useful because it I can only put the one circuit on there really as soon as I put power in it's gonna power whatever's on there on here I can have two individual circuits these two use the same amount of power which is great and I can split that from this and give it a different power I've actually set it that it works with the same power but but you have got the option of splitting it really here it is watching guys out you find this these little circuits honestly are really worth making because when you get this great sense of achievement when they work you get to faff around and play around and I think you'll learn a lot more doing stuff like this than you know maybe some of the other stuff yeah I'll show you what I mean about the splitting of the rail side of it so I've got the power on now and I'll put it on I'll just move these two wires and put it on to this side I've just tweaked this because it was separate voltage there's another one same and as you can see look my little moving the wrong stuff so my my four LEDs are nice and bright there it's only it's limited to 30 milliamp and it's actually pulling the voltage down to less than five volts now but they are a lot brighter and I've got to run that six volts and give it 80 100 million so now as you can see the other side isn't is it is a non we should have the dark sensor on and it's not because I've taken these wires from here from here and across here so all they do now it's I'm gonna put those back just to show you that will go out I'm just gonna pop that in pretty much anywhere and the other dark sensor comes on now and the light sensor of course sorry about your eyes I see why just leave that on sorry about the flickering it doesn't flicker inside here it's my LED light and now if I get a jumpers color coordination so I know what's positive negative and I'm just gonna jump the positive side across to this side we have now both sides on very very slightly then hardly hardly noticeable these things take just a few milliamps 30 milliamps at the minute but four or five LEDs on the knocking of course watch your eyes and then those two are two outer ones would go off brilliant so splitting the splitting here is brilliant even though the connections may not be so good but splitting up isn't just being able to have that facility is much better than not you can always bridge it to have just the full power going down the both sides of the rails but not having that option it can be a little bit limiting to having this the size socket board like this and they'd be there to put really one project on there so anyway here's watching that