Fareed Mohmed · About
About
Engineer · Photographer · Grower · Traveller
This site gathers four sides of the same person into one place — the workshop, the field, the garden and the road. It's a personal record more than a portfolio: notes, tools and images built and kept because the making of them was worth doing.
Fareed Mohmed works across engineering, photography, gardening and travel, and this site is where those four pursuits live side by side rather than in separate corners of the internet. Some sections are further along than others. Engineering holds the largest body of work: a growing set of interactive calculators and reference tools for machine design, and a free Arduino learning lab for students, described below.
Why Arduino matters to a future machine maker
Every machine, from a bottle filler to a lift module to a full production line, does the same three things. It senses what is happening, it decides what to do about it, and it acts. An Arduino is the smallest honest version of that loop. A sensor reports, a few lines of logic choose, and a motor, valve, light or buzzer responds. A student who understands this loop on a desk can walk onto a shop floor and read a PLC panel, a servo drive or a safety circuit with the same eyes.
The mechanical side of machine design is learned from drawings and calculations. The other half, the electrics and the logic, is where many students never get a first step, because it seems to need a lab, a kit and a teacher. That first step is what this site tries to remove.
Read the world
Light, distance, temperature, gas, motion, water level, current, weight, position, cards and fingerprints. Students learn what each sensor tells you, what it cannot, and how to wire it safely.Think in sequences
Steps, waits, conditions, counters, timers and memory. This is the same thinking behind ladder logic and machine sequences: what happens first, what must be true before the next step, what to do when something goes wrong.Move and switch things
LEDs, buzzers, relays, servos, steppers, DC motors and pumps. Students see why a motor needs its own supply, why a relay isolates a load, and why mains wiring deserves respect.Free, with no wire to buy
The Arduino Simulator runs in the browser on a phone, tablet or computer. There is nothing to buy, nothing to install and no account to make. A student picks an Uno, Nano or Mega, drops in sensors and actuators from a list, and the simulator draws the real circuit: every wire in its own colour, a pin table they can change, and a list of every connection from one leg to the next. They build the step sequence, press Run, and watch LEDs glow, servos turn and motors spin. The program turns into real Arduino code they can copy into the Arduino IDE, and a parts list with store links is ready for the day they want to build it on a desk.
The Arduino Project Library removes the blank page. It holds 364 projects in twelve groups, from a blinking light to traffic junctions, parking sensors, smart doors, fire and gas alarms, water tanks, solar trackers, robot arms, line-following cars, data loggers and cloud and radio links. Each project opens with the circuit already built and running, with a clear explanation of how it works, what to learn from it, what to try changing, the program, the code and the parts needed. The projects are written fresh for this site, with the idea credited and no copying of anyone else’s code or drawings.
Each project also has an In the real world panel. Pull it up and the same circuit appears as a real street, gate, room, tank, workshop or road. The traffic lights run on a road junction, the barrier lifts for a car, the plant droops when the soil is dry, the robot drives through a warehouse, and what the student builds is mirrored in the scene. It shows a child, in seconds, that a small circuit on a screen is the same idea that runs a city.
Along the way, every part carries its do’s, don’ts and cautions. The mains relay is drawn with live, neutral and earth and a plain warning, so that safe habits are learned before they are needed. In full screen, tabs for pins, wires, sequence, code and parts list open over the drawing, so students can study the circuit and its explanation together.
What a student takes away
- How to read a circuit and trace power, ground and signal wires.
- How sensors and actuators differ, and how to pick the right one.
- How to break a machine task into a safe sequence of steps.
- How timing, counting and memory make machines reliable.
- How to find a fault by checking the wiring, the pins and the logic in turn.
- The confidence to move on to PLCs, drives and real machines, with a good picture of what is happening inside them.
The simulator is a place to learn and to make mistakes without cost. It does not replace a real bench, a real meter or real safety training, and it says so. It makes the first step cheap, so that more students take it.