Let's Make Robots!

can any circuit be completed without arduino

i have completed the circuit but it still not running ? find the images.

1) To spin the motor on breadboard circuit, does adruino uno really required, without adruino uno is it possible to complete circuit on breadboard using atmega?

2) is it necessary to use 2 battery for the circuit on breadboard to spin motor using atmega? in the rc mini helicopter the circuit contains only 1 rechargable battery, so why the circuit on breadboard require 2 battery and require adruino uno ?

i made the circuit as suggested and deployed the program into microcontroller, but the motor does spin ?

can anyone suggest the correction ?

do you mean except pin16, rest of the connection on breadboard and program is correct ?

and for pin16, the connection should be removed from the microcontroller and be connect to the another battery,right ?


please tell me any correction in the attached circuit image diagram on breadboard and here is the program in c

do i need any correction in my program and circuits to drive motor ?


#include <avr/io.h>

#include <util/delay.h>

int main(void)


DDRC = 0b01111111;

PORTC = 0b01111111;



PORTC = 0b00110101;


PORTC = 0b00111010;





i have completed the rest of the circuits as shown in the below link and also deployed the c program in to atmega32 using programmer.

i just want to know where to connect wires of pin1,pin9 and pin16 of l293d on the breadboard ?

only these 3 pins i have left to complete the circuit ?

I will again make my question clear

i am using this exactly below post circuit


but dont know how and where to connect wires from pin1,pin9 and pin16 of l293d in uc pins/somewhere breadboard ?

my main objective is to construct quadrotor controlled by android phone. but i want to complete the small basic circuits steps and then move on to next final circuit.

i have read on internet about the motor driven circuit that they put the pin1,pin9 and pin16 of l293d towards arduino boards. but i lack arduino board, so i want to know is it possible to complete circuit for 5v for uc and 9v-12v for battery from l293d ?

lets my question be more clear, that for driving a motor forward and reverse, i have atmega32,l293d,battery,breadboard, 2 motors,resistors,transistors, and a programmer to pass program in microcontroller. now what i lack is arduino board . many circuit i have seen on internet for driving motor are using arduino. so my question is do i need to buy arduino or is there any circuit to drive motor with above components without arduino board ?

my earlier question was not explanatory, everybody thought i was not using microcontroller.

A small circuit like blinking led or multiple leds can be completed without arduino, then is it possible to make the circuit to drive the motors without arduino ? I can see the final product like quadroptor does not include heavy arduino. so i am looking for the circuit to drive motors without arduino on breadboard ?

can anyone help me ?

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It sounds now as if a quadroter isn't what you're attempting to make, where inititially that sounded like your goal.  

What is it you are trying to construct, and what precisely do you want this object to do?  

Giving a useful answer to your question (believe it or not) is heavily dependent on these factors.  Remote control projects and robot projects can both use an L293d, but one is likely to need a μController while the other may not.  If you have an ATMega32 and a programmer, all that's (functionally) missing from what's called a "Breadboarduino" is a 5v regulator though.

Even a custom made Arduino sheild......With the appropriate logic/transistor circuitry. Sensors, servos, steppers etc can all be made to stand alone. I suspect in your case-ya better stick with something programmable.......

 My concern with your question is "Arduinos are heavy" This statement from anyone just scares the hell of me and I have never weighed one to know exactly how much it does in fact "weigh".

 Perhaps an airborne project in fact should not be your first.....Perhaps something with some wheels?

Just a suggestion......

You can make anything without a micro controlller, but in some cases you're talking about a few million transistors 

I don't think anything can be done without an Arduino.  That means that those who use PicAxe, Basic Stamp, Propellor, Launchpad, BeagleBoard and especially Raspberry Pi are Godless heathens and must fall before the inquisition!

I think you can buy quadrotor kits at most hobby stores that don't have a microprocessor of any kind in them, or at least not one that you need to program or futz with.  Not to chase anyone away, but I'd imagine that looking on RC enthusiast pages would be a better start than robot pages.

Long before micro controllers or micro processors existed people were making advanced things with just electronics. It's not that hard to make a robot without a micro processor. This is a nice example: http://letsmakerobots.com/node/34792

They make lightweight controllers for quadcopters. Frits has produced a really good video on YouTube that shows some basics of what you can do. If that is what you are interested in, you should check it out.

Microcontrollers like the Arduino allow you to make programmable robots and other electronics. If you have a dedicated function you want to implement, you can do so directly in a circuit in many cases. 

So if you want a non-programmable robot, you can build the circuit and let it go. If you want the robot's behavior to change, you have to change the ciruit hardware. The SpurtBot projects I have posted here and on Instructables are simple robots that require no software programming, for example.

ultimately an LED can be run with just a resistor and a battery. No arduino involved.

However controlling a quadcopter will need a microcontroller or FPGA of some sort. Not necessarilly the whole PCB though and there have been designs where people have made arduino compatible boards in the shape as part of their chassis