uC Development Board

This is my home made Microcontroller and General purpose Development board.

The Board supports with basic functionalities such as Direct LED out [16 LEDs], Mono

shots, Clocks etc.The switch boards used for mounting electrical switches form the

base of the development board.The board is driven by a Nokia mobile Charger [:P] with 6.13V open voltage. [Always use 3-pin adapters.]Under the hood the circuits contain Monostable multivibrator for monoshot both high pulse and low pulse out.

The Asatble multivibrator circuit uses a knob [hacked potentiomete

r] which switches between three different capacitances [47uF, 1uF, 0.1uF] to provide variable clock period [~2s, 0.5s, 0.05s]

Links:

http://www.doctronics.co.uk/555.htm#reset

http://www.doctronics.co.uk/555.htm#monostable

The 7 segment displays are Common Anode configuration. The 7-Seg can be directly accessed or can be triggered by BCD input given to IC 7447 [BCD to 7-Seg Driver].

Apart from this all other extra features can be added to suit your applications.

I used M-seal to stick all the circuits on to the board. Looks messybut better than to drill holes for each board and screw them and keeps the other side smooth!!

I completed this 18 months ago and took me 4 days to complete and cost me around

Rs.700.

Videos:

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