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  1. Dave Benemerito

    LM317 Help

    Hi, I have a SIM800L module with no voltage regulator on it. I have power it between 3.7V to 4.4V. I was using LM317 to regulate the power from the supply (4.6 to 5V) using two resistors 220Ω and 470Ω When building the circuit, the output voltage was 3.1V which lower than recommended and might...
  2. Dave Benemerito

    RFID PICC Write to blcok 0

    Hi, I've been exploring RFID and I'd like to do different stuffs. Knowing that in the PICC memory block 0 is a manufacturer's data, I would still like to know how to write in this block and change a PICC's UID Thanks!
  3. Dave Benemerito

    Solar Panel School Project

    Hi, electronics newbie here, we currently have a project in school about creating a miniature city with generating electricity. I chose Solar energy. I bought a small one with max output of 2-3V. I hooked it up with a MT3608 Step Up module and wired parallel with my 5mm LED lights hoping that it...
  4. Dave Benemerito

    18650 power supply

    I just wanted to ask if an 18650 3s2p is fine to power a quadcopter? thanks
  5. Dave Benemerito

    PID Corretion to PWM

    Hi! I just got the concept and implementation of PID control loop. Right now, I'm having a problem how to turn PID corrections into PWM for ESC in a quadcopter. Thanks in advance for the awesome replies! :)
  6. Dave Benemerito

    ESC and Motor using Variable Power supply

    Hello everyone, I am planning to create my prototype of my AVR based drone. I'm first going to use two motors and ESC's on a balance platform to test the PID. I would like to ask if I can power the Motors, ESC's and the electronics with a variable power supply? Thanks! :)
  7. Dave Benemerito

    Learning PIC Microcontrollers

    Hi, I want to learn PIC Microcontrollers. About how to program with pickIt2 or pickit3, basic configure settings, PWM, MPLAB, I2C and SPI in PIC, and interfacing sensors. The book I found interest is this "PIC Micorontroller and Embedded Systems Using Assembly and C for PIC18 By: Muhammad Ali...
  8. Dave Benemerito

    Arduino PID Controller Help

    Hi, I've seen interest in creating my own quadcopter flight controller using Atmega328p(arduino) and some sensors. One feature a flight controller must have is a PID control (Proportional Integral Derivative) which makes a quadcopter stable. I've searched how to create one, however I only...
  9. Dave Benemerito

    Circuit Issue Help

    I've been finding what's the reason of this issue of my XOR Gate circuit for days but I couldn't find one. The issue is when I pull down both inputs low, the output is blinking which should not be. I've been trying 3 different 74LS86 but still happens the same. Could you please help me out. Thanks
  10. Dave Benemerito

    Invert Inputs on XOR Gates?

    Hello everyone, I'm really new in Digital Logics and found many videos about it. I saw this video that adds binary numbers by Ben Eater on youtube: .I was confused because his inputs for the first XOR gates are attached to ground from the DIP swtiches. I tried to do the same and it really did...
  11. Dave Benemerito

    Arduino SIM800 Module help

    Hi again everyone! I'm from Philippines, 13 years old. I just wanted to ask help in programming this module with arduino. I've been searching in the Internet but I couldn't find one. I just wanted to have help in sending and receiving SMS.
  12. Dave Benemerito

    PiezoElectric Tiles

    Hello everyone! My name is Dave Benemerito from Davao City, Philippines. I'm 13 years old. I just want to ask help for my project.It is a PiezoElectric tiles generator. For my Circuit, I used a UA741CP OpAmp IC to amplify the signal. I'm not really sure for my pin configurations. Actually I put...
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