na 3 AAA nepotrebujete menic, AT by mel jet od 2,7V na 3MHz. HCcko si snad se snizenym napetim taky poradi. jirka7a wrote: > Dobry den, vyvarim aplikaci s: > 1 x at89c2051 na cca 3MHz + 1x 74hcxx + 4x led diody nizkoprikonove. > Napajeni 5V ci 3V >