-
Very simple, versatile modular design
No limits to the number of modules used
in the ring
Circuit diagram using
LEDs:
Circuit
diagram using Lamps:
Parts:
R1 1K5
1/4W Resistor
R2 680R 1/4W Resistor
(Optional, see text)
C1 47??F 25V
Electrolytic Capacitor
D1
LED any type
Q1 BC337 45V 800mA NPN
Transistor
P1 SPST Pushbutton
LP1 Filament Lamp 12 or 24V (See text)
Comments:
The purpose of this circuit was to
create a ring in which LEDs or Lamps illuminate
sequentially. Its main feature is a
high versatility: you can build a loop containing
any number of LEDs or Lamps, as each
illuminating device has its own small circuit.
The diagrams show three-stage
circuits for simplicity: you can add
an unlimited number
of
stages (shown in dashed boxes), provided the last
stage output was returned to the
first
stage input, as shown.
P1 pushbutton
purpose is to allow a sure start of the sequence
at power
-on but, when
a high
number of stages is used, it also allows
illumination of more than one LED or