Hi Welcome to the Eev blog an Electronics Engineering Video Blog of interest to anyone involved in electronics design. I'm your host Dave Jones Well there it is. April 1st 2011 Hi If you saw my last blog, you'll know that I Couldn't resist myself I did a triple 5 timer scam and yes, it was complete. Of course there is no secret hidden Easter egg in the triple five timer sorry H I couldn't resist including you to help sell the story and uh, if you're wondering how I did it.

it's pretty simple. Let me show you what uh, what you see here is real. but what you didn't see off camera is there's a second oscillator infin Vision scope. Let's take a closer look.

Okay, here it is: I've got I'm using the waveform generator output I'm generating the sine wave at. you guessed it, 55.5 Hertz At about half a volts, it's AC coupled. It goes into a little secret hidden switch here, which I was using to, uh, turn the signal off and on off camera that you didn't see Now of course there's nothing connected to Pin Five here of course, which is the modulation you can use for modulation input on the triple 5 timer. frequency modulation now.

Uh, but what you didn't see are these wires running under the ESD map. There they go and pop up through a hole in the ESD mat at the bottom and on the bottom here. I just drilled a hole through the breadboard. There it is and I solded that uh, that oscillator? um signal directly onto pin Five.

the little strip inside on the bottom of the bread for board for pin five. So that's how I was able to do it off camera I just flick that switch whenever I uh wanted to cue the modu ulation and that's it. Pretty darn simple I Hope you enjoyed it and catch you next time. sorry Hans and if you've never actually seen under a breadboard before, I Highly recommend you just unscrew the uh screws on the bottom and lift it out.

and lo and behold, there are the individual strips and you can see how there's the uh breakup here in these power strips up there. and there's the individual uh strips and you can actually just uh, pop these out if you want. um and you can just sold her directly on there. which is what I did.

and the B the baseboard just holds those in. In fact, you can buy these that don't have the baseboard and they'll just have like a paper backing on them. One of the first breadboards I ever got when I was a kid actually just had it was a Radio Shack Tandy one and it just had paper on the back like that so that's all that holds them in and you can see exactly what the strips are like have a play around with it. See you Yeah!.