Dimwit -#0.5 whadayamean a couple ? we already have a diode. http://easy-electronics4u.blogspot.fr/2012/02/simplest-led-flasher-one-transistor.html http://easy

Dimwit -#0.5 whadayamean a couple ? we already have a diode. http://easy-electronics4u.blogspot.fr/2012/02/simplest-led-flasher-one-transistor.html http://easy-electronics4u.blogspot.fr/2012/02/simplest-led-f... Although I'd use a tiny micro or a blinking diode by now.