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I am making a solar panel cleaning robot and want to select appropriate motor for the selected roller brushes for the cleaning.
The brushes are as shown: https://3.imimg.com/data3/MN/MJ/MY-8076819/roller-brushes-250x250.jpg
The dimensions of brushes are: InnerDia:0.7",Outer dia(along with...
I have previously programmed on 8051 and have recently started programing on arduino.
I wanted to start with IOT (internet of things). As a firsthand project i wanted to interface a potentiometer to arduino and send its voltage values to my smartphone. How do i start doing this.
thanks,paul
as u rightly mentioned in practise it can measure upto 400cm(4000mm).
i did put the max limit,the object need to be detected within 100cm if the distance calculated is above that then the leds display nothing as programmed i will put up my code:
this is my first code only with one...
thanks for reply
i have already got it tested working fine and measuring distance properly as expected.
Now i am interfacing two ultrasound sensors it is actually for a robot following human project where in the two sensors will detect to move right or left depending on position of the human...
i am using hcsr04 ultrasonic sensor as here : **broken link removed**
interfaced to 8051.
i have connected TRIG PIN TO " P1.7"
ECHO PIN TO " P0.1 "
the timing diagram of the sensor is as here :
https://www.ezdenki.com/graphics/hc-sr04-timing-chart.png
with no pulse given to the sensor...
i have built a tesla coil using slayer exciter like this one : **broken link removed**
not exactly the same way i used different transistor but everything worked fine.
In order to have good frequency control i used microntroller 8051 to give pulses to the transitor which is connected to...
well the micrcontroller what i have used costed me around 450 INR(indian rupee ,1dollar=50 rupee assume).
so 10dollar =500ruppes hence micrcontroller cost itself is 450ruppes(a year back this was 8051 uC the cost has increased now).
& cardboard, nuts & bolts ,pcb,leds together 50 rupees (1...
power transistors are always used in switching circuits.
Their switching capacity must be faster.
So let's say base voltage is removed the charges in conduction mode take time to go to their original positions(when no base voltage) this time taken is reverse recovery time. This reverse recovery...
i have a SMPS :
the ratings are:
250VA capacity.
230vac i/p .
battery i/p 12V.
now how do i decide battery AH?
say i want to use 20W 4 CFL tubes for backup time of 1 hour.
no that is not true battery voltage remains =9.43V i.e the supply voltage.
OK all the readings with motor connected i will put it once more..
- - - Updated - - -
i do not agree with this as i told in my prev post i will repeat it:
apart from having a 9v motor i have a 12v motor as well. For...
no
the battery voltage is not exact 9v but, 9.25v And ic supply voltage =4.35V-4.38V(fluctuating) from 7805 regulator.
+of 9v to pin 8=0V
'' '' '' pin 16= 9.75V
'' '' '' pin 1= 9.24V-9.28V(fluctuating)
'' '' pin 2= 9.24V-9.28V(fluctuating)
0v to pin 4,5,12 &...
But i already gave you the potential difference created @ pin 3& 6 (for motor 1) & pins 14 & 11 (for motor 2). Without giving voltages @ i/p pin there would have been 0v.
yes i did that too... but no effect.
yes i did not connect ground of power supply to the ground of supply to my motors i...
ya i did that & result is the same one:
i post the connection dig for l293dne once again : https://developeraspirations.files.wordpress.com/2010/04/l293dne.png?w=300&h=182
(can you see that image?)
there is a voltage difference enough to drive motor but not running.
So these are my final...
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