Technical (टेक्निकल)

IC L293D, is the Motor Driver IC, which is usually linked to Robotics Applications. Even if you tend to use this guy, few basic questions still arouse in the minds of budding Hobbyists; Like Why 2 supply pins on the IC, How much voltage can be given to the IC, Should I short all the Ground pins of the IC ??????  Here, I'll be explaining the Pin description of L293D and not the specifications or other technical details. You can refer datasheet for that. L293D datasheet click here. To start with, any Microcontroller development Board works with a Max. of 5V, with a few hundreds of mA current. In case of ARDUINO Duemilanov: DC Current per I/O: 40mA DC Current for VCC & GND: 200mA  Is this current sufficient enough to drive a everyday 12V, 200RPM DC motor ? No.  So what ? Use a Motor Driver.  Does it help ? Yes. It converts low current to high, sufficient to drive a motor. Pin Conections (Important: Even pro's tend to m...

Difficulty Rating : 3/10 Ever wanted to make a Line follower Robot, 'without' using  Microcontroller ??? Then you have visited a right place. Inspiration: I stumbled upon this Robot in my First year of Engineering during one of the Intercollegiate Robotics Championship (Regional) and ever since, it was my dream to make this Robot on my own. I googled for it & got many designs, but all Microcontroller based. I even shortlisted a few but my senior Pratik Kamat asked me take small steps first and suggested me to make one without the use of Microcontroller and with self designed logic. Now, as a part of Electronics workshop in Sem-IV (II Year), we were supposed to make a project based on 'Electronics'. Since I was introduced to Microcontrollers at that stage, I made a proposal to make a Microcontroller based LFR( Line follower Robot). But it was rejected by my Batch in-charge as no microcontroller based projects were allowed for current semester. So i decided...

Difficulty Rating : 1/10 First Self designed Robot Based on LDR based light sensing module Description: This circuit is specially designed to make a Robot that can be controlled using light. Works best with a laser light . LDR or light dependent resistor is a resistor which has high resistance in dark (a few megaohms) and low resistance in light. Using this principle two kind of circuits can be implemented viz. photovore(Light activated) & photophobe(dark activated). The module shown below acts as a photovore.The variable resistor adjusts the intensity of light at which the transistor switches ON. So when light falls on the left ldr, left motor will get activated and when light falls on right ldr right motor will get activated, depending on how you attach the motors. Components: light dependent resistors (LDR)-2 2.7 Vz Zeners (Recommended, but not required) -2 Diodes 1N4004_1N4007 (any)- 2 General purpose transistor(SL 100 or 2N3903)-2 10K pots-2 low rpm DC...