adjustable 2 digit 7-segment counter - Page 2 - Electronic Circuits Projects Diagrams Free

duffy · 3rd April 2009, 06:20 PM

Wait - I'm Duffy himself, how can you be Duffy yourself?

MrDEB · 3rd April 2009, 10:29 PM

11 is the load pin so when the dip switches connected to pins 9,10,1,15 are preset then the value gets loaded into the 74192 when pin 11 is grounded. if building this I and don't need the programable inputs then connect a 1k resistor to pullup pin 11.
pin 4 is the down pin.
pin 5 is the up pin.
I see your post refering to a variable voltage.
did you even look at the 15 step variable voltage circuit?
Electronics for You-Circuit Lab- Free and tested circuit diagrams-15-Step Digital Power Supply
this circuit has BCD outputs!!
must be young high school kids or ?? that want somethig easy.
how much easier than the link I gave you??
its exactly what you want as per your description
just add the 7447 and the 7 segment display or better yet the 4511
it has 2 latch/decoder/drivers per chip

DuffyHimself · 13th April 2009, 12:33 PM

Thanks for the answer, but i went ahead with my original design and solved the problem by making the circuit in a program called Tina 8.0.
But now i'm a bit lost on how to connect the DA converters. I've connected them like this so far:

And now i don't know how to connect the 4 remaining pins on each of them. The analogue output (i assume this is the one called A) from each of the DAC's, has to be connected to the OP AMP to compare them. When the bottom DAC gives a higher output than the upper, the lamp after the DAC has to light up.

edit. oops, posted wrong picture

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3rd April 2009, 06:20 PM	#16
duffy	Wait - I'm Duffy himself, how can you be Duffy yourself? Last edited by duffy; 3rd April 2009 at 06:20 PM.

3rd April 2009, 10:29 PM	#17
MrDEB	your circuit is wrong 11 is the load pin so when the dip switches connected to pins 9,10,1,15 are preset then the value gets loaded into the 74192 when pin 11 is grounded. if building this I and don't need the programable inputs then connect a 1k resistor to pullup pin 11. pin 4 is the down pin. pin 5 is the up pin. I see your post refering to a variable voltage. did you even look at the 15 step variable voltage circuit? Electronics for You-Circuit Lab- Free and tested circuit diagrams-15-Step Digital Power Supply this circuit has BCD outputs!! must be young high school kids or ?? that want somethig easy. how much easier than the link I gave you?? its exactly what you want as per your description just add the 7447 and the 7 segment display or better yet the 4511 it has 2 latch/decoder/drivers per chip

13th April 2009, 12:33 PM	#18
DuffyHimself	Thanks for the answer, but i went ahead with my original design and solved the problem by making the circuit in a program called Tina 8.0. But now i'm a bit lost on how to connect the DA converters. I've connected them like this so far: And now i don't know how to connect the 4 remaining pins on each of them. The analogue output (i assume this is the one called A) from each of the DAC's, has to be connected to the OP AMP to compare them. When the bottom DAC gives a higher output than the upper, the lamp after the DAC has to light up. edit. oops, posted wrong picture Last edited by DuffyHimself; 13th April 2009 at 03:57 PM.