Right, this isn't an addendum because I modified the circuit to that where we're just using a very simple output circuit Driving a very simple driver circuit and then we've got that And then we've got the thermistor side there We've got the 1k, but the low side on the thermistor That's actually a 10, it needs to take it, but then we've got to really back to it We've got a 2, that's actually a 220 Let's call that on there correctly That's a 220 And a 5 or 7, 2, 1 And then that's all the way Okay, so that's pretty much it Exactly, I've said we've got like That's a 220, but it's using 4 resistive to make it Otherwise pretty much exactly the same, there we go And so we've got it working here There I've got the 220 and the 100 There's the 100 there And this is the 220 output This is coming in from the Arduino And then we're bridging this across with this way here to the input And that's going to the base of the PC547 Base And then the emitter and collector circuit is very straightforward And of course we've got our circuit here with the... That's what easy is a series parallel circuit So we've got two pairs in parallel connected in series to give it the same 220 But the half water still quarter And then it's working And we've got pretty much I think the similar switching on time Yeah, about 10 microseconds The off time is actually better now But I expect that because of the... Okay, there you go The off time is better because we're switching the transistor harder So we've got one microsecond per division You can see that's actually within two microseconds That's like about 1.6 microseconds now It's the off time And that's to be expected Because we're actually using a higher current into the base And we're switching the transistor off harder as well So it's coming on from being more off as if it were So we're feeding that transistor with more current Which means this should switch off quicker and of course it is And so that circuits a faster switching time than the original Which I think was about four microseconds originally So that was pretty good, only works And it's quite straightforward And I was showing you that Just so you can see And that result in better temperatures Not much better because the main problem with the temperature was the... In fact that was running it running the current through it I don't know what current it is, it's not going to be much less than the lamp I would to So it is working And the reason why it's important that that works is because That's the one that I simulated here Although I haven't got this current amplifier arrangement It's just these two here with that transistor there And then from here we're taking directly into the gate With a 220 here instead of a 10k we've got there So we can use this current amplifier arrangement To enhance the circuit So that we don't need to have high currents flowing down this path here through this transistor And you can see that gives very good switching times of course The time I expanded these and the times is obviously Sub microsecond easy These scales are not showing that And that circuit has been superseded so I'm going to replace that diagram