Amplifier la4440

Scheme :

this is old and original from sanyo datasheet.. so if you want to try it, buy it and build it :-)

protoboard :
not yet uploaded, next time i will upload my protoboard . i don't promise :)
result:
good,.. this is caled "compo amplifier", cause has compact figure box, small enough and able use batterai 12V
the IC produce heat, please use a good heatsink.

Digital Clock - Bill Bowden

here the scheme :
i want change IC 74390 to 4518 4 bit BinaryCodeDecimal counter. the last D not connected cause running until 6 step only before reset it.
D C B A Decimal
0 0 0 0 0
0 0 0 1 1
0 0 1 0 2
0 0 1 1 3
0 1 0 0 4
0 1 0 1 5
0 1 1 0 6

see ?... the D never used, keep it zero (ground).

Here the new scheme using 4518.. ups sory my file lost :(
protoboard :

to be continued.........

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