One of the most common place where small MCUs are used is to drive big seven segment displays in public area. For example the bank token number, flight or train schedule, train coach number, production volume (in factories), current forex(in banks) or gold rates etc. Since these are public display they should be big (and bright) enough to be seen from a distance of few meters. And due to their bigger size(and high brightness) they require 12V supply for each segments. Current requirement is also high. All these call for a sophisticated circuit, since these type of circuit is very common we have developed a compact board with integrated high voltage driver circuit coupled with an AVR 8 bit CPU.
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High Voltage Seven Segment Display Driver Board |
Further information, datasheet and user manual will be available as soon as the product is offered for sale.
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Avinash
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Thank you for publishing one more inportant utility board. We are eager to see some useful tutorial with this board like displaying customer number waiting outside hall like this.
Regards,
Uttam
Oh perfect! I need this now! Hope it’s available soon.
when this product will be available?
waiting for it…
@Mr. Amit,
It will be available in 7-10 days.
i am waiting this tutorial ;
and thank you very much you are my mentor and teacher in the embedded system field 🙂
sir,
is this product available?
its not being listed in the store 🙁
The product is not in stores yet?
how long will it take?
Can you share the Schematic of this?
@amit : here its a ULN driver along with NPN drive transistors..why do ask for schematics..make on your own..its simple..
@surya:
thank you very much for the valuable suggestion. I very well know making is much easier thank asking and would really have appreciated if avinash sir had said the same thing instead of you
Regarding why I asked, For your knowledge, it makes use of PNP transistors for driving, NPN are only for switching the PNP transistors, i had already made my own (using 547+557) which worked fine, but was confused why avinash sir added power transistors thats why asked.
Thank you for suggestion and reply
Hello Avinash,
This is an awesome board and i am eagerly waiting to buy one. kindly let me know, when it will be available.
Thanks
Brijesh
Hi,
I was looking all over for a similar board for my scoreboard project. When are the boards going to be available?
Thanks,
Ryan
Sir,
I have used 547 in my project but did not get proper output.Can you please share the schematic of this board?
Thank you
Rozina
Dear Avinash
Is this board available?
Regards.
Karanbir
Hello there ,
Is this still exists?
Thanks
Vino
@Yes it exists.
Please see this http://store.extremeelectronics.co.in/Big-4-Inch-4-Digit-LED-Display-System-using-ATmega8.html