From 2b41af78a35fc78cbbf258dff2064674a64d3eef Mon Sep 17 00:00:00 2001 From: catalyst Date: Fri, 17 Oct 2025 08:21:40 +0000 Subject: [PATCH] Update README.md --- README.md | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 38b4c66..6812027 100644 --- a/README.md +++ b/README.md @@ -1,14 +1,15 @@ # Flip-Flop -Astable Flip-Flop Circuit PCB. +## Astable Flip-Flop Circuit PCB. ![Astable_Flip-Flop](Astable_Flip-Flop_Circuit_2025-10-16_c3e_pcb.png) -Blinks, but also makes square waves. +### Blinks, but also makes square waves. A great candiate for a soldering workshop becuase it is gratifying with the blinking LEDs. There is more. It creates a square wave that can be observed with an oscilloscope. Also, even if sinus waves are preferred for producing radio frequency (RF), the project is a very good entry point into exploring oscillators, a corner stone in generating RF. +### Parts Parts required to make the flip-flop circuit are: 2x LEDs; @@ -17,6 +18,7 @@ Parts required to make the flip-flop circuit are: 2x 100 kOhm resistors; 2x BC547 transistors; +### PCB Fritzing files can be print by yourself or you can have the circuit board printed for you for a fee, for example by uploading the .fzz file to https://aisler.net/ @@ -24,6 +26,7 @@ Included are also Gerber Files (.zip) for printing by other board manufacturers, Attached are images and a file that can be opened in the Fritzing software (from https://fritzing.org/) to view the schematics, inspect or modify the circuit if desired. Fritzing also generates a breadoard view, a picture of which is also attached: the project can be made without a PCB. +### Components Q1 and Q2 are the BC547 transitor. Alternatilvy the equivalent 2N2222A can be used, it has slightly more gain than the BC547. However, the 2N2222A will have to be mounted rotated 180 degrees as it's pin out is the other way round than that of the BC547. @@ -38,6 +41,7 @@ you can choose LEDs of any color. J1, J2, J3 are optional. Use them to pick up the square waves and display them on a oscilloscope. J3 is ground. +### PD This work is dedicated to the public domain.