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« on: April 19, 2012, 10:22:47 PM »
roopeshkrishna
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        Good evening all Respected Modelling Friends.. even from the earliset stages we were discussing ,looking and sharing lots of ideas for ESCs for brushed motors.. especially with reverse function, is a must in Boat,Ship and land based models like Cars,trucks, Race vehicles, Hover crafts etc.. some recent postings reminds us, the unavailability of a simple ESC set up.. here i am adding all of my proven circuits one by one, as we starts from ever simplest methods to a highly complicated methods using H bridges and micro controllers.. all these are for brushed motors..
         All we know, this is a new ERA of modelmaking, all with ample of goodies all around us, that the goodies once considered only for rich in money.. still we lack something.. especially while doing our own models and projects..and still the goodies are some expensive when compared to a average modeller..secondly, if we can make all needed stuffs our own, the satisfaction and sheer pleasure will be so great and much inspiring..one of the other reason of self making is the flexibility of our own stuffs.. we can make our needed stuffs up to our specifications.. Thumbs Up
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« Reply #1 on: April 19, 2012, 10:34:18 PM »
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       Many of us consideres the Brushless motors are the final word in model making.. is that true..?  never.. Brushless motors are far superior to a Brushed motor, is sure, but still Brushed motors have an important role to play , not only in modelling segments, but also in day today life.. in my expiriments Brushed motors shows a good flexibility and applicability in Robotics, and all segments of model making.. it also starts wthout any jerks, and delivers a great torque in low RPMs.. to achieve this in a Brushless motor we have to use a good programmed ESC.. so, still brushed motors are so important even now.. and yes, in aero models, Brushless motors are the best bet, while in land based mnodels, like Boats,Ships and Cars Brushed motors plays a nice role,.. even after 4 years of constant running in daily basis, many of my crafts are still working perfectly, without any head aches.. the only maintenance work was replacing the brushes once.. so, we know all motors are just like Cows, that it gives us ample of utility.. but we must take care of them.. if so, the Brushed motors will gives us years of trouble free services..another one excellence of a brushed motor is the easy of reworking.. we can rework on any brushed motors according to our needs.. easily..
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« Reply #2 on: April 19, 2012, 10:44:01 PM »
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      If we convert a Brushed motor in to a 4 brushed one.. the performance will be far beyond explanations.. so, please hold all brushed motors in hand.. do not throw it all away..  all you will understand the values of a Brushed motor.. so, the below circuits and set ups are mainly intended for Boats, Ships, Cars, Race vehicles, Hover crafts etc.. but we can use it in any place, any applications from a robot to a rail road model, as inside the craft, or in outside, to power the rail tracks, of a rail road model, and will works from 6 volts to 24 volts nicely.. and can flex to any extent according to our needs..here i am sharing the proven circuits, but all you can add any additions for the purpose..
     So, at beginning we must start with ever simplest possible method, yes, while keeping an eye on beginners and Excellent modellers who are not advanced in electronics.. in first methods, we are using only some few components, means not electronic components but as whole.. anyone can make this one, and can Rcyit.. no complications.. can make and add with Printed Circuit Boards, or without PCB, without solderings.. and so easy.. but effective.. Thumbs Up
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« Reply #3 on: April 19, 2012, 10:46:57 PM »
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    Now we must go for a thinking, about needed materials, and how can we reverse a Brushed motor without a complicated Electronic circuits..
     
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« Reply #4 on: April 19, 2012, 11:43:05 PM »
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         sorry.. lost powersupply..
         It is not much need to expain to rverse a Dc Brushed motor..all we know this can be done by changing the two wires on motor, the wires coming from battery.. so, yes it is very easy to alter the direction of a DC Brushed motor..
and, in a Brushless DC motor, we can reverse it easily, by changing the two end wires in to opposite polarity..
         Now, when we consideres an ESC to a particular craft, we have two option to adopt or to fix an ESC on same craft.. first one is yes, that can make the entire ESC module on a common PCB, or on a plastc card, or on a piece of Sun mica,or even on a piece of card board.. in this case, the total size of the ESC will affect the installation and space within the craft.. means, the ESC will be a particular size, because of the size of the board that we use to make the ESC unit..
         Second method is, very clever, that we can fix all needed components in convenient places, especially, more clearly, we can fix the Power transistor, just under the nose of a boat, and can add a aluminum heat sink on it, to cool it, and can add even a submerged aluminum fin, just under the nose (BOW), or belly, so the main component will be in a safe place, and concealed within the hull.. so, just adding all components in convenient places, we can avoid any messup with wires and over crowding of components.. but in this case, we must use some extra thick wires to avoid any current losses..
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« Reply #5 on: April 19, 2012, 11:59:24 PM »
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    As a beginning, we can start from a simple  and light motor controller set up, ideas all from around us.. light DC motors employs in various places.. just like Robots, toys , and tiny gearboxes..and many.. so, an easiest method , to control a tiny Dc motor is surely a standard servo itself..  by doing some adjustments inside a standard servo, we can simply use a standard servo to propel a Boat, Car, robot that uses a tiny DC brushed motor.. but still a good standard servo is expensive..
    That is why, we can make a simple low wattage ESC for tiny motors like EP 60, to EP 90 and many toy motors, many taperecorder motors.. now many expert modellers laugh at me.. because of expalining about tiny motors and tape motors.. but it is a true, that a tiny 3 volt toy motor can propel a moderately sized boat, at 3 volts..without heating up.. with an appropriate gear box, and with an appropriate hand made prop will do the job nicely.. we will make a boat with a toy motor and a gear box from a toy later..  and tape recorder motors are too good to make slow running War ships, Cargo ships, and Fishing trawler like models.. many good quality tape recorder and VCR motors are brushed with Gold graphites.. lasts for years.. and we can find many RS series motors on commercially available robotic gear boxes..all are good.. so, by keeping beginners in mind, we can start with a simple motor controller set up at first.. we can reverse the direction of the motor , with a simple switch operated by a micro servo, at this easy stage.. as we advances we can go for more compact and complicated Elecronic circuits..

        so modellers.. we starts with simple ESC at first.. this circuit works from 4.8 volts, nicely, and can add to 12 volts.. but retain this for 7.2 volts maximum as this one is for tiny and less current consuming motors.. rated Amperage will be within 4 to 5 amps max..
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« Reply #6 on: April 20, 2012, 09:41:08 AM »
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           Good morning  Modellers.. sorry i lost server at night.. follows..
Can anyone make these set ups own..? yes, that, if you are a person, who can connect a receiver and ESC along with a battery pack on your exscisting craft, or if you are one that who can light up a simple torch bulb with two pieces of wire and with a dry cell.. then anyone can.. so, do not worry.. i am adding the steps from lowest point so even a simpler beginner can go through..

materials needed.. as a first step, we must need some inexpensive components for us.. are follows..

MJE 3055 power transistor..X 1
SL 100 general purpose transistor.. X 1
2200 MF 25 Volts electrolytic capacitor X 1
47 K or 100 Kilo Ohms sliding potentio meter  X 1 ( MUST BE WITHIN 1 INCH or 1.5 INCH MAXIMUM SLIDE LENGTH).
red L E D X 1
green L E D X 1
heat sink for MJE 3055 X 1
some good quality wires ( FLAT RIBBON CABLE CAPABLE OF 10 Amps AS BEST),X 1/2 meter..
in line fuse holder and in line fuse ( MUST BE DC FUSE AND IN TO 12 VOLTS 5 AMPS HERE)  X 1.. can buy from car acssesory shops..
common P C B, X 1 ( OR CAN ASSEMBLED ON A CARD BOARD)..

all these costs you about less than 50 Rs/-

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« Reply #7 on: April 20, 2012, 09:52:46 AM »
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as a basic need of RCying, we must need a perfectly working radio set.. so, keep the radio set near, and make sure you have three micro servos with you.. at first, we can make an arrangement, that we can increase the throttle, with the throttle stic, while, the craft goes in reverse when the throttle stic pulled in extreme lower end.. its easy to do..

so before going in to practical, we can go for a good component reference at first.. this helps beginners a lots.. here we discus only about the pins and its uses of used devices, and not in to technical complications, formulas, fundas, and theories.. as here we do not need anything like that.. if follow simple steps, and if the connections are true, it will work..
so, keep your radio with you along with three micro servos..

now can check the main power transistor used here, the transistor used here is , to control the motor.. we using the transistor with a second one, to make a darlington pair.. for more versatility.. leave all theories behind.. here we have to control our motor once.. thats all..so, it is a must to know about the component well in once.. experts may laugh at me, but please consider beginners and modellers who are not in to deep electronics once..
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« Reply #8 on: April 20, 2012, 01:37:48 PM »
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     Before going for a variable spped control for Dc Brushed motors, we must examine some possibilities to control the motor or motors without any electronic circuits, and as on and off in both directions.. this kind of set ups helps us to energize a motor in either directions with the control stick of the TX.. so can operate a robotic arm, as up and down, or as grab and release, or as FWD and REV in a pre adjusted speed.. this will be useful in many applications..  this kind of ON/ OFF in both directions also helps to make light Boats, Ships, hover crafts and a lots.. so, with a 4 channel radio we can simply control 4 motors in both directions.. and all motors will be OFF when the stick reaches at centre.. speed can vary by adjusting the battery voltage.. so, as an easy method we can think about the simple set up..

    for achieving this control we need only two simple switches.. as you see in the photograph.. the switch have three terminals, as C, NO and NC..  C means COMMON, is main point of contact, while NO means Normally Open, and NC means Normally closed.. so, when we examine, the Common point will be in contact with NC point.. when switch in off.. means when not as depressed.. you can see the simple steel lever at the top of the switch, to make it On or Off.. this switch can handle up to 6 Amps in 24 Volts DC.. costs about 10 Rs/- for one.. for heavier applications we can adopt the same assembly proses, but with a heavy duty switch and with a standard servo..

    We must collect two identical switches for this idea..

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« Reply #9 on: April 20, 2012, 01:43:01 PM »
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now you can see the arrangement of switches in a particular way.. when the stick of TX goes to one extreme, the servo arm will depress the lever of one switch, turning it ON.. then when the stick of TX reaches at centre, the servo arm stands between both switches.. keeps both are in OFF position.. then when the stic goes to the other end, the servo arm, depress the next switch.. turning it on.. so, we can simply attain motor On /Off with these switches.. how can we wire the terminals..?  here you can see only two wires.. leave it.. will add how to wire.. by step by step.. cond:

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« Reply #10 on: April 20, 2012, 04:56:11 PM »
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       Now please, carefully listen the mounting lay out of switches between the servo arm once.. you can use any type of switch, with Single Pole Double Throw.. but make sure, that the switch is in a shape, that can be fixed in such a way, that a servo arm van depress and release it.. here we can see 3 terminals on each swithces..
      As i mentioned earlier, we can see the C, NO, NC points once again.. see once again, that the way i fixed the switches.. the C contacts are facing each other.. and all yes..

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« Reply #11 on: April 20, 2012, 05:04:26 PM »
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      Its time for a simple check out.. this step is not essntial, but showing you that the confguration of switches.. set Multimeter in Continueity Range.. in this point, a buzzer will sounds from meter, when two probs shorted.. now take two probes of  meter, and place one on common point (C), and one on Normally Closed point.. (NC), make sure the servo arm is at centre, in this time meter will emit the buzzer noise, while panel show a ----.. means the switch is connected.. from C to NC..points..

      Change the prob, from NC point to NO point, and repeat the test.. in this time meter shows nothing and no sounds.. then keeping both probs in same terminals, depress the switch once.. and can see the meter satrts to sounds and reading will apper as 0.. so, can make sure the polarity of switches..
Once again: this step is not essential.. but can go if you want to check the C, NO, NC contacts are working..

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« Reply #12 on: April 20, 2012, 05:11:59 PM »
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    Just start wiring.. take two pieces of good wires that holds about 8 to 10 Amps cont: flexible but good quality wires a must... these wires can purchased from Car shops as in Meters in length..
you can use any colour, but strictly follow a colour code, for motor wire and battery wire.. on every craft and on every work.. this avoids future confusions, while in a service procedure.. here i am following Yello+ Black for motor wires.. and you must follow RED wire for Battery + and Black wire for Battery -  .. if not, a confusion will occur while later works, and can a reverse application of battery that can damage or destroy your carft or set up..
    Here, i added Yellow and Black wire on each C points of each switches..
    After that wiring attach a second black wire, for battery as shown, on NC point..

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« Reply #13 on: April 20, 2012, 05:15:24 PM »
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   Solder a second piece of wire on the same terminal that we soldered the Black battery wire..
Solder the second tip of the same wire on the NC point of the next switch.. as shown..

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« Reply #14 on: April 20, 2012, 06:15:30 PM »
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solder a Red wire on the NO contact of the switch as shown..
add a second little wire to the same terminal as shown..

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« Reply #15 on: April 20, 2012, 06:18:15 PM »
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now solder the second wire to the second NO terminal..now the arrangement is ready.. test time..

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« Reply #16 on: April 20, 2012, 06:22:58 PM »
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      Now connecct the Yellow and Black wire to the desired motor..
And connect the RED and Black wire to the Battery.. if we want to change the direction of the motor in a desired stick position, please change the terminals of Yellow and Black wire on motor,

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« Reply #17 on: April 20, 2012, 06:26:20 PM »
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  Entire arrangemets are ready.. now test time.. before going for a video, we can examine once what is happening here..

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« Reply #18 on: April 20, 2012, 06:35:06 PM »
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  If we examine the set up once, we find that, when the servo arm is in centre, both switches will be connected between the Common point and Normally Closed point.. in this condition, the both motor terminal will get same - ( Negative ) voltage through the switches.. because, both NC points are connected to the - supply of battery.. but, when any of the switch depressed by the servo arm, the NO contact will connected to the Common point of the pressed switch.. so, we are already soldered the + supply of battery to each NO terminals of the both switches.. instantly, one pole of the motor get the + supply from battery.. so, motor will start to run in one direction.. when the servo arm goes at centre again, the switch closes again with NC contact, leaving both motor terminals in to - supply.. this same thing happens when the second switch depresses.. as the second pole of the motor gets the + supply it runs opposite of the first direction.. so, with stick of TX can control motor for both directions..

   From above notes we feel some thing big thing.. but you can follow procedures carefully and will take about 20 minutes to complete this set up.. when you completed you will realize how simple it all..

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« Reply #19 on: April 20, 2012, 06:45:20 PM »
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     Now we got a simple but effective arrangement to drive a DC brushed motor in to both direction with our radio set.. we can use heavy duty switches while using heavy duty motors.. these similar switches can buy from any Electrical shops who deals the needed materials of washing machines and refrigerators..

 the test video follows.. after that we will make a simple ESC to drive small Dc Brushed motors.. with reverse.. Thumbs Up
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« Reply #20 on: April 21, 2012, 11:03:16 AM »
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sir your all related ideas still helping us alot.we are still using all circuits. Hats Off
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« Reply #21 on: April 21, 2012, 11:58:40 AM »
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State: Kerala
RC Skills: Beginner
Posts: 3602
Join Date: Oct, 2010

HYDRO PLANER.....



Gokul, this year we will make more useful stuffs for the Academy..  Salute
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« Reply #22 on: April 21, 2012, 02:32:28 PM »
roopeshkrishna
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City: calicut
State: Kerala
RC Skills: Beginner
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HYDRO PLANER.....



here i am adding the test video of the first set up.. all we can see its too simple and efective.. with this simple se up of motor control, we can simply operate a motor in any Amps rated, in a pre set speed.. for an example, we can switch and control a robotic arm, one is designed to run at 20 RPM at 3 volts.. so can up or down the arm of a robot with ease.. this also can be used to control a motor of a boat, ship, car or anything and even a real fan, that if we used a big switch and insulations.. can also switch on the lights and winches in either direction.. here is how it works..  Thumbs Up

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« Reply #23 on: April 21, 2012, 02:58:02 PM »
punty
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City: jaipur
State: Rajasthan
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Great piece of work Sirji. Smiley
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« Reply #24 on: April 21, 2012, 04:10:42 PM »
roopeshkrishna
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City: calicut
State: Kerala
RC Skills: Beginner
Posts: 3602
Join Date: Oct, 2010

HYDRO PLANER.....



thank you Punty.. its too useful but simple..

Modellers, now we saw that, how to control a DC Brushed motor in either directions with our radio, and with switches.. now we can go for to make a motor controller with variable speed.. in an easy way that anyone can do.. means to make and adopt this useful thing to your craft, you do not become as an Electronics Engineer, or an Electronic technician..no theories.. no formulas.. just fix it and RCyit.. all with a reverse function..  Thumbs Up
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