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Disco strobe with amazing police flasher effect! Compared with xenon, LED is more durable and unpretentious. It can also be used for cars.

To build our strobe, we need a chip k561la7


Well, the rest of the details.

Everything is clear from the diagram:

(click to enlarge)


R1 - R3 - 1 MOm

R4, R5, R6 - 2 kOm

R7 - R10 - 100 Om

C1, C4 - 10 uF

C2, C3 - 0.25 uF

VD - any

T1 - ct 315

T2 - ct817

Any zener diode for stabilization voltage 6 .... 9 volts

switch - any

LEDs - any super bright.

If desired, the tuning resistors can be replaced with constant resistors after selecting them.

Resistors R1 R2 adjust the pulse frequency.

Resistor R3 adjust the frequency of the pulses of "dragee".
Capacitor C3 select the time of the pulse of the glow of the LEDs.

The switch is used to switch: ordinary strobe. or a police flasher.

Well, choose the number of circuits with LEDs yourself! For example, in my 10 circuits, and therefore 30 LEDs.

Design can be anything:



And it’s better to make two strobes: one with blue LEDs, friend with red !


Source: zdelaisam.ucoz.com
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Comments (10)
  1. Bobyk13
    #1 Bobyk13 Guests September 17, 2011 00:50
    0
    And there is no printed circuit board on this circuit? And what analogues can replace CT transistors ??????
  2. NOTFRONT
    #2 NOTFRONT Guests September 17, 2011 09:14
    0
    Draw a board yourself. T2 - you can use kt815, and t1 - any n-p-n structure
  3. Bobyk13
    #3 Bobyk13 Guests September 17, 2011 15:41
    0
    Cool shemka !!! Dealt with transistors !!!
    And you can tell the principle of its action, otherwise I’m only learning this, in short, I’m a teapot in principle of its action. And then I don’t understand, I don’t understand, you turn the potentiometers on, they just light up, you twist still, they blink differently and C1 plays a role here ??? And what happens if you switch the SA switch ????
  4. nukolau
    #4 nukolau Guests June 9, 2012 15:58
    0
    soldered the circuit! but very bright LEDs shine very dimly! tell me what’s the matter?
  5. feelloff
    #5 feelloff Guests June 9, 2012 16:36
    0
    [b] nukolau [/ b], resistors R7 - R10 reduced to 10 ohms. or the number of LEDs in the garland.
  6. kazak-09
    #6 kazak-09 Guests March 6, 2013 12:22
    0
    I have 1 small question ... I am a beginner radio amateur and you can say a kettle in these matters ... so don’t really judge ... I can’t understand in the diagram what these details are? Please tell me...
    [center] [img] http://washerhouse.com/3/en/pictures_users/1/19.jpg [/ img] [/ center]
  7. feelloff
    #7 feelloff Guests March 7, 2013 20:26
    0
    [b] kazak-09 [/ b], if you don’t know what it is, then it’s better to drop it all.
  8. Sergey
    #8 Sergey Guests June 16, 2013 20:00
    0
    This is a microchip.
  9. Egor
    #9 Egor Guests September 2, 2013 10:26
    0
    This is the microcircuit that is at the top of the K561LA7 page. It is shown schematically that it consists of 4 elements, only they are in one case. The numbers 1,2,3 ... 13,14 - correspond to the conclusions of the microcircuit.
  10. den556655
    #10 den556655 Guests October 19, 2015 10:17 PM
    0
    which diodes are better to use ????????

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