Relay based two step counter
As I am working at an amusement park, our roller coaster ride suddenly had a problem. It never stopped, it is continuously running over and over. It was supposed to run on the loop two…
Khairul Hasan
Reading data to PC from a cheap multimeter – 5
Now comes the trickiest part, to capture the pulse with a STM32 blue pill board and send it to computer via serial. I will use arduino for programming. The pinout I have found for the…
Reading data to PC from a cheap multimeter – 4
To determine the segment pins, i had to remember the theory of seven segment. Seven segments usually has 7 LED for showing a single digit and one led for a dot(i dont care for it…
Reading data to PC from a cheap multimeter – 3
The mighty DT830D multimeter. DT830D Multimeter battery removed After opened, the meter looks like this. DT830D Meter Opened, not showing the back cover. The LCD pads has 31 pins. Among those, 3 pins are shorted…
Reading data to PC from a cheap multimeter – 2
To read the data from a multimeter, at first i have to determine the individual pins of LCD, which is connected to which segment, the microcontroller voltage to drive the LCD and the nature of…
Reading data to PC from a cheap multimeter – 1
I was fascinated of getting data to PC to conditionally control other things, or making graphs to make the thing more understandable. There are RS232 capable, even bluetooth capable multimeter are available but those costs…
Bluetooth Robot-3
The final physical looking of the Blueooth robot. This thing looks like a toy, isn't it? Well, this(robot chassis/mechanism) is taken from two toy cars. Then the extra portion are cut off and glued together…
Batch script to prepare Windows 7 Bootable Pendrive.
Its easy to prepare Windows 7 Bootable Pendrive if you know some commands. However, you will forget the commands and their sequence easily when you need to setup windows next time later. To overcome this…
Android R/C Car Control Over Bluetooth
Its really fun to control a R/C car from a android phone. However in my previous post i have discussed how to control a vehicle by bluetooth from laptop or android phone. That has a…
Bluetooth Robot-2
I will discuss the circuit diagram and mechanical description of the bluetooth robot now. Here is the previous post that contains the program. Actually, It's not a robot. It's some kind of remote controlled car…