I
IanW
Guest
"IanW" <spammenot@blah.com> wrote in message news:gef70q$ool$1@aioe.org...
battery, would I be right in assuming that a 9V 0.5W Zener would be the
correct type for those two diodes?
Incidenatlly, on all these circuits would you generally use ceramic, poly
layer or other types of capacitor or does it not matter in this kind of
circuit?
Regards
Ian
With regard to D21 & D22 on your schematic - given I intend using a 9V"Jasen Betts" <jasen@xnet.co.nz> wrote in message
news:ge6kpt$895$1@reversiblemaps.ath.cx...
On 2008-10-27, IanW <spammenot@blah.com> wrote:
Hello
Does anyone have a circuit diagram for a 20 LED chaser please? All the
ones
I can find via Google seem to be about 10.
use a 4047 wired as an astable multivibrator for the oscilator.
and a 4017 decade counter, clock the 4017 from pin 10 of the 4047
use pins 10 and 11 to select between two banks of 10 LEDs.
if you use high efficiency LEDs the whole thing will run off 3v with
just those two chips a resistor and a capacitor for the clock and two
resistors to control brightness.
Hi Jasen. Thanks for the schematic on abse, that looks good too and makes
3 circuits to try out![]()
battery, would I be right in assuming that a 9V 0.5W Zener would be the
correct type for those two diodes?
Incidenatlly, on all these circuits would you generally use ceramic, poly
layer or other types of capacitor or does it not matter in this kind of
circuit?
Regards
Ian