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Basic Analog Flip Flop Schematics

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This schematics is a basic analog flip flop. As we know, there are analog flip flop which built using analog components like ordinary transistor and digital flip flop build using digital logic IC (integrated circuit) like TTL IC.

Basic Analog Flip Flop Schematics diagram

and here the result:

To control the speed of light's "on" and "off" in another word "control the flash rate", you can replace the Resistor 10K with variable resistor 20K or replace the electrolytic capacitor 100uF with other value.

Flip flop PCB layout:

Make Your Own Printed Circuit Boards
Make a PCB in very easy steps..! Create your PCB design using PCB designer software like Eagle, print out your design on photo paper or glossy paper with laserjet printer. Stick the printed design on the PCB (copper side) and then heat it using hot iron plate. The ink will stick on the PCB and it will be ready for etching process.
Watch this video detailed steps:

Note: If you don't have laserjet printer, then you can print the design on standard paper. Copy the printed design at Copy Service around your location (with glossy paper).