Bistable circuit is a circuit in which the circuit is stable in either state. It can be flipped from one state to the other by an external trigger pulse. This circuit is also known as a flip flop. It can be used to store one bit of information.
Now let's try to build a bistable on our DIY pcb board.
You need to get the right components of the right pakage.
If you want to connect the 2n3904 like the above, you need to mirror the left 2n3904.
You need to move the components to the right position and finish the connection and then hide the useless layer. After that our eagle paper has finished.
You need to print this circuit by the laser toner printer.
You need to paste the paper on last step with the copper clad caminate and then put it in the heat transfer machine.After that, put the copper clad caminate into the etching solution.
You need to drill the holes.
add the components and solder.
We also can make a pcb by make a photosensitive pcb board.I will show you next time.
Thanks for reading.