Tag Archives: fun

74HC4040 Counter


74HC4040 Counter

12-Bit binary counter

This circuit is the basic setup of a 74HC4040 binary counter it is driving 12 LED’s. to build this first connect Vcc (pin 16) to the +5v rail and Grd (pin 8) to the 0v rail of your project board. You will also need a square clock pulse that is supplied by a 555 circuit you can find this on my other page here. this is a 12-bit counter and will count up to 4095 before returning to 0 if connected to the 1Hz clock pulse that will take just over 1 hour to overclock. To reset this to 0 you can press the switch on pin 11(Master Reset) and this will force all the outputs to 0 instantly.

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Science Museum Electric Dragster

We visited the Science museum on the run up to Christmas and I bought an Electric dragster for my son however he was a little more interested in playing with his other toys while I build it. However my daughter certainly enjoyed helping out with the build, you can watch the video below…

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Laser Cutting

Spent the weekend setting up and cutting out the start of a Mowi 3D printer out of 6mm Plywood.
This 3D printer is for a friend of mine and a member of a fellow member of my local makerspace.
I cut it on a Trotec speedy 300 laser cutter the cut took 12 minutes and needed very little adjustments to get it to come out of the plywood cutouts. The construction was a little difficult as there are no plans on line to the assembly.

you can follow the links below to see the source for the construction and a video of me cutting it out at Southlondon Makerspace


http://reprap.org/wiki/Mowi_printer

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