nº734

nº733

nº732

nº731

Barra crescente de 10 leds controlados por 1 transístor, alimentação 1xNiMH

Growing bar with 10 leds controlled by 1 transistor supplied by 1 NiMH battery.

"Ladrão de Joules" para barra crescente de 5 leds com 1 transístor, alimentação 1xNiMH

"Joules thief" for 5 leds growing bar with 1 transistor, supply 1xNiMH.

Sirene de alarme com 2 transistores e led azul, alimentação 1xNiMH

Simple negistor alarm siren with 2 transistors, supply 1xNiMH.