Hardware Hacking

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Technically this is not a Hack as I haven't done anything to it but it is a bit of reverse engineering and although it is not bus sniffing, I did do a bit of sniffing with my nose. I was inspired by Ralph Yamamoto's Blog on his old Pong game (Pong is Alive ) to dig out an old pulse generator I made, probably over forty years ago.

 

My Old Home Made Pulse Generator

 

The construction is much better than I ever remember doing, I must have been training to be an engineer or something, before I gave it all up to become a lecturer. The top and bottom are laminated chip board and the sides are repurposed aluminium sheet. I recognise the plastic coating of the sides from my days at GEC Telecommunications in Coventry when I was on placement, they had skips of old stuff they no longer wanted and you were free to take whatever you wanted. The front is brushed aluminium with Lettraset lettering covered with a plastic film I think.

 

In the video below is a look inside and quick overview of the integrated circuits used.

 

 

I'm not particularly attached to this pulse generator so rather than testing it step by step to see if it working I decided to just powered it up and see what is what. If it blows up it blows up.

 

 

Surprisingly it still seemed to work so the next step was to see what outputs were still being generated.

 

 

All the outputs still seem to work as desired, albeit with some strange voltages at times. Amazing! After 40 years sitting in cupboards and being moved from house to house, it is still in one piece and still works as it did when I first constructed it. 

 

Still, life moves on. I do not have any sentimental attachments to this pulse generator as I just do not remember making it and I'm not going to use it as it isn't safe and it is very heavy. Plus I am currently in a phase on de-cluttering so this is likely to end up on the rubbish heap somewhere in the not too distant future. I do not want any of these old ICs so I will not keep them. I might keep the 4 mm sockets and maybe the mains plug but that is probably all. If I ever need a pulse generator in the future which does seem unlikely, I will either make one from an Arduino or buy one ready made.

 

Dubbie