Using a 555 timer and a mosfet to control the speed of a DC motor with a potentiometer.
Video here https://www.youtube.com/watch?v=5nwNKPs2gco
Usando un circuito integrado 555 y un mosfet para controlar la velocidad de un motor DC con la ayuda de un potenciometro.
Video aquí https://www.youtube.com/watch?v=Q2N2OEicXJE
This is a **fully functional 555 timer** project using publicly available bipolar transistors.
The project uses 24 transistors. The resistance values are taken from the datasheet and are slightly shifted towards the more accessible series of values.
There are three test points.
The PCB design process can be...
![Screenshot from 20200912 155356.png](//image.easyeda.com/pullimage/Yx4CgTSQeqoXSwLwNrNMmMg9L1xzKZA92s47sWKJ.png)
Это простой в изготовлении драйвер rgb светодиодной ленты. Благодарямощным транзисторам охлаждение почти не требуется
This is an easy to manufacture rgb led strip driver. Thanks to the powerful transistors, cooling is almost not required.
There is nothing worse than running your drops only to realize that you have a fault in one of the cable runs. The best approach is to get it right in the first place by using a "LAN Cable Tester". Sometimes, cables can also tear because of poor material quality or bad installation or sometimes they get gnawed by animals.
In this project, I am going to make a LAN cable tester with just a few basi...
My first PCB Design. It will be used in my learn to solder classes at my local public library. Many thanks to Ralph Bacon for the great YouTube tutorials to get me started.
- Part 1 https://www.youtube.com/watch?v=wu2YcZDzzCY
- Part 2 https://www.youtube.com/watch?v=JdqQD-QMHfE
The circuit uses a 555 timer IC in astable mode creating a high / low pulse on the pin 3 output. Using this calculator...
**This project is to demonstrate the need for and the basic effect of Power Supply Decoupling.**
In real circuits the power supply is not an ideal zero impedance source. The supply itself has some source resistance even though it may be in the order of tens of milliOhms. The wiring and PCB traces present a resistance but more importantly in terms of impedance, they present an inductance in series...
This project uses a 555 timer IC and a 595 shift register IC to create an LED follower circuit.
The 555 is setup as an astable circuit with the trim pot varying the frequency between 1.4 Hz to well over 100 Hz. The output from this circuit creates the clock pulses for the shift register.
On the 595 shift register we feed the variable clock signal to both the shift clock input SCK and the regist...