这个pic16f84 signboard是不是有问题？

wertvision

http://www.interq.or.jp/japan/se-inoue/e_pic6_2.htm

timoti

I use this as reference for my circuit during my project, it work, but i use pic 16f877a. (may i know r u doing ur school project for this? which school r u from?)

wertvision

i am just interested in PIC designing. i think coding PIC16f877A should be the same, it has more function than PIC16F84. May i know how the circuit work? do u use the same code in ur projects? I say it has problem because i think the 74HC154 is a 4-to-16 line Decoder, it can only show an LOW output at the same time. so how can it light up more than one column of LEDs at the same time? another problem is how the circuit displays a heart shape? from the circuit explanation, we can only display a square! is it use any coding manipulation to make that effects? or any trick behind it? thanks.

[ Last edited by wertvision on 7-12-2004 at 09:04 PM ]

wertvision

请问timoti你可以告诉我你的电路是怎样操作的吗？

wertvision

我仔细读过SOURCE CODE。它利用快速刷新LED的方法。在一秒内刷新很多次。所以看起来就像在动一样。

kee020041

http://www4.tpg.com.au/users/talking/5x7%20Display%20Index.html