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Forum 2005-2010 (read only) / Français / Re: problème de relayage
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on: July 02, 2007, 03:27:31 pm
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Bizarre, Je ne vois que 2 possibilités, soit une erreur dans le cablage (autour du relais peut-etre) soit un problème au niveau du programme. Le meilleur moyen c'est de vérifier au voltmètre si les tensions voulues sont là (pin de l'arduino et collecteur du transistor) et ce en accord avec ce qui est positionné par le programme.
My 2 cts.
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Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: The 4794 LED Driver example
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on: September 02, 2006, 04:20:15 pm
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Conceptually none. Electricaly, problem can occur if you have an ouput which drive lot input (here EO, STR and CP), this is the fanout limit (one ouput can drive only a limited number of inputs, current (from output) is subdivided beetween inputs). Up to 10 ten circuits will be OK, for more it's better to regenerate signals.
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Forum 2005-2010 (read only) / Frequently-Asked Questions / Re: The 4794 LED Driver example
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on: August 10, 2006, 07:21:27 am
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Hi, In the figure 6 page 8 from 4794's datasheet, you will find an example of cascading driver (up to 16 LED with 2 drivers). Of course you can repeat the cascade (extend the daisy chain) by adding more 4794 circuits in the same manner.
You must modify the program to control new leds. You need more PulseClock(). You can extend the for loop (up 16 with 2 x 4794) and change : if (count == 7){ to if (count == 15){ .
auguste.
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