Basic#1 - Wheatstone bridge
Some basic info and formulas about the Wheatstone bridge. See how it works and why we use it.
Homemade electric screwdriver
This is a very simple project. I've designed a 3D printed case for the electric screwdriver, it uses a DC motor with gear system, H bridge to control rotation and a Li-ion battery.
PIR switch circuit with delay time for 220V AC
In this tutorial we make a simple circuit with some capacitors, resistors and some transistors. Also, a PIR module that detects movement. Uisng a potentiometer we can set the time the light stays turned on. Check tutorial for more...
Make a 6s Li-Ion battery pack with BMS
This is a very basic tutorial and there are already a lot of guides on how make this. But, since this is part of a future project (electric longbaord), well I'm doing this first step and show you how to connect the batteries, add charging protection and more...
UART in FPGA Verilog
In this 4th aprt of the FPGA series, we will make the code for reception and transmission of UART communication. You will learn how UART works, hot wo make the RX, the TX and the Top.v.
Etch a PCB using DLP printer
In this tutorial, we will use a DLP printer to expose the circuit on a photosensible film over a copper board. Then, we will use acid to etch the PCB and see the results. DLP printer should give use very good results.
Basic components - Schmitt trigger
We will see why we need a Schmitt trigger and when to use it instead of the comaprator OPAMP configuration. Also, how to create the Schmitt trigger configuration using OPAMPs. Finally, some examples of trigger made with BJTs and resistors.
Logic gates - basic tutorial
We will finally learn a bit about the FPGAs, how they work and how to program them. But first, since FPGA stands for field programable gate arrays, we should start from the beginning and first learn what are logic gates.
BASIC OPAMP CONFIGURATIONS
Operational amplifiers tutorial. We will talk about 6 different configurations. Comparator, follower, inverted, non-inverted and finally the integrator and differentiator.
BLUETOOTH ARDUINO TRIAC CONTROL
Detect the zero cross of 220V RMS voltage. Use photocoupler and separate high voltage from low voltage of the Arduino. Create the firing pulse for the TRIAC gate and control power with bluetooth connection and a smartphone App.
SENSORED ELECTRONIC SPEED CONTROLLER
I'll take a brushless motor with hall sensors out of an old CD writer. Next we amplify the signals from the sensors, build the controller using the ATmega328 chip and make some tests.
DSP5015 LAB POWER SUPPLY
Read an ID tag with an RFID module and Arduino. Detect if the ID is correct and open a servo motor. Using a master card, add new IDs. Error message if ID is incorrect.
DIY BOOST CONVERTER WITH FEEDBACK
Let's build a boost converter. We already seen the buck converter. This circuit will elevate the voltage. We will see the Arduino circuit + feedback and the specially designed IC.
DIY FLASH ADC OF 3BITS
Very, very basic tutorial. A little bit on how an flash analog to digital converter works. How the voltage divider works and get different values of voltage. Encode the outputs of the ApAmps with Arduino.
DIY INVERTER CIRCUIT - ARDUINO OR 555
We will build our own inverter that will pass 12V DC voltage to 220V AC voltage of 60Hz. The circuit is low power (around 24W) but it is enough to charge your phone, laptop or power a light bulb.
HOMEMADE BLUETOOTH SPEAKER, 3D PRINTED CASE
Build your own portable speaker. Find here the full schematic and all the steps. The idea of this kind of project is to reuse any component that you can.
DIY AC/DC CURRENT CLAMP FOT THE OSCILLOSCOPE
Build your own non invasive current clamp for the oscilloscope with a basic circuit and a hall sensor that will measure the magnetic flux created by the current passing through a wire.
DIY BENCH POWER SUPPLY FROM AN OLD PC POWER SUPPLY
Build your own bench power supply out of an old PC power supply. Using a DC to DC step up step down converter we could obtain a variable output from 1 to 26 volts and also control the current limit. Enjoy!
BUCK-BOOST DC TO DC CONVERTER
Learn the theory and how to build a boost DC to DC converter combining buck converter with the elevator one.
BOOST DC TO DC CONVERTER
Learn the theory and how to build a boost DC to DC converter
BUCK DC TO DC CONVERTER
Learn the theory of a buck DC to DC converte
TDA7492P 100W BLUETOOTH PORTABLE SPEAKER
We all like music and we all use smartphones. So this tutorial will show you how to build a low cost 100W wireless bluetooth portable speaker with high quality output. Step by step on how to build and use it.