Introduction: Simple LED Flip-Flop for Beginners
A very simple Flip-Flop circut for beginners
Step 1: Parts List
Parts list:
- LED X2
- Resistor: 10K (brown-black-orange) X2
- Resistor: 1K (brown-black-red) X2
- Electrolytic capacitor: 100uF X2
- Transistor: NPN like BC108 X2
- 9V Battery with connector
- Striped wire
- Breadboard
- Spongebob assistant (optional)
Step 2: Resistors
1K : Brown - Black - Red
10K: Brown - Black - Orange
Put resistors on the breadboard like pictures.
Step 3: LED
Put LEDs on the breadboard like pictures.
Notice to polarity of LEDs
Step 4: Capacitors
Put capacotrs on the breadboard like pictures.
Polarity is not very important
Step 5: Transistors
Put transistors on the breadboard like pictures
Step 6: Wiring
Connect point 5 to 11
Connect point 6 to 8
Connect point 2 to 9
Connect point 4 to 12
Connect point 7 to 10
Step 7: Battery
connect + to point 13
connect - to point 10
You can use 3V to 9V battery
Step 8: Run
You can use larger capacitors (like 470uf) for slower flashing and smaller (like 47uf or 10uf) for faster flashing.
Use a larger capacitor (like 470uf) for slower,or a smaller one (like 47uf or 10uf)for a faster blinking.
9 Comments
6 years ago
very well posted .i have made in five miniutes .you have posted step by step .No difficulty faced in making circuit. THANKS .
Reply 3 years ago
your welcome
5 years ago
actually, the polarity of electrolytic capacitors is kind of important
Reply 5 years ago
but good tutorial!
Reply 3 years ago
Thank you so much...
Question 3 years ago on Step 1
Im trying to make a simple led flip flop forbeginners. 4 questions
1 The first photo shows 4 resistors but the list only mentions 2 or is it one of each type?
2 There is no photo showing the resistors in place before any other component. Are ther any available?
3 Is it 1 of each type of resistor to each capacitor/tansistor/led group?
4 Can further such groups be added with similar connecting wires?
I would be obliged if you could answer these questions
Thanks
Peter
Answer 3 years ago
1- Sorry, I had a mistake and forgot it (I will correct it). You need 4 resistors, two 1K for LED and two 10K to connect to capacitor.You can use higher or lower value for resistors. Resistor that connect to LED, control LED brightnes. Ressistor that connect to capasitor control speed of blinking.
2- Images four and five in step 2, and also image on step 7.
3- I dont completly underestand.Each pin of ressitor connect like image or text. I think this schematic help you:
http://www.talkingelectronics.com/projects/5-Proje...
4- for more LED blinking, must use other schematic like this:
https://www.circuitspedia.com/simple-5-led-blinker...
for more LED blinking, I offer use IC.
I apologize, my English not good.
7 years ago on Introduction
Thanks for sharing such simple and consise information on Flip-Flops. I love that Sponge Bob was so willing to help you with this!
Reply 7 years ago
Thanks alot