Doorless Tiled Shower

Double LED flasher does it 555

here is a dual LED Flasher it was not 555
This circuit is used to flash alternately 4 LED high brightness
When the cursor turns trimmer R1, can be programmed from 22 to 48 flashes per minute about (these numbers depend on the tolerance of the electrolytic C2, tolerance up to 40%
with electrolytic!). If we want to reduce the number of flashes per minute, increase the capacity of C2 by passing 10 to 22 uF. The formula to calculate the number of flashes per minute is as follows: Number

Lightning / min = (86 400: C2): (R1 + R2)

R is in k and C in uF, 86 400 is the number obtained by multiplying the constant 1440 provided by the manufacturer of integrated circuit 60 seconds to one minute. For
C2 10 uF we planned, but if we climb a 22 uF how lightning will we?
Suppose that R1 is set to its maximum value of 220 k, we have:


N = (86 400: 22): (200 + 100) = 13 flashes / min.

For more flashes per minute, turn the trimmer R1 to 3 / 4 of its travel (approximately 50 k) and we have:

N = (86 400: 22): (50 + 100) = 26 flashes / min.

can also vary the number of flashes / min by changing the value of R2.
the device can be powered by a 9 V battery or a car battery or 12 V by a power supply 12 V.
scheme has led flasher:

schema led:



Iist
R1 ...... 200 k
trimmer R2 ...... R3 100 kΩ
...... 330 Ω R4
...... 330 Ω C1
...... 47 uF electrolytic
C2 ...... 10 uF electrolytic
C3 ...... 10 nF polyester
DL1 ..... High Brightness LED DL2
..... High Brightness LED DL3
..... High Brightness LED
DL4 ..... High-brightness LED
IC1 ..... NE555
S1 ...... toggle switch
PP ...... jack 9 V battery