Nighthawk355
Hello all,
May i introduce myself, i am Garrett and am constructing a robot for a class project. I have run into an issue in charging my robot and have not yet been able to locate an answer in this forum and online.
My issue is:
I am going to run two motors with TB6612FNG dual motor controller. To my understanding, i cannot run the power source for these two motors directly off of the EZ-Board... I must supply a seperate power source to the motor connecting it directly to the HBridge and a seperate power source connected to the EZ-Board.
I want to create a docking station that the robot can connect to and charge both the battery for the motors and the EZ-Board without turning the robot off. I cannot seem to find a splitter or the right information to complete this task.
Any ideas?
Thanks,
-Garrett
battery and charger goes to point C and point B be goes to point A for point D you need a small back battery like from a cell phone or wireless telephone battery about 6 volts to 7.4 volts ,current of battery can be very small current like 100 ma so the EZB board will also be on,when you charge main 7.4 volt 3000ma main battery ,also should have a switch to turn it off ,so dont drains both batteries also i see you have power going straight to motor controller witch is ok,but should have a fuse for rating of the board
@ ROBOTMAKER Okay, sweet thanks for the input. I updated the diagram.
Question(s)
location of the switch... should it be located where the switch is current? or at either point A or B?
How does the common ground wiring look from the battery/charger to the EZ-Board?
-Garrett
everything look good,what program did you use to make the drawing also also you may need a second switch at point B if not using it for a while or dpdt switch with get 10 ma drain with only switch for EZB and maybe small drain on motor controller and still need switch going to EZB because of both batteries will drain too
also on instructables website so a very cool wireless battery charger ,what the circuit is using 2 coils one on bottom of robot and one on the floor and a circuit like dc to dc isolation converter ,but instead of using a transformer ,using 2 seperate coils
@Robotmaker
The program i used was MS Word lol... i just layed down the lines haha... took me like 3 hrs. I agree that point B needs a switch, that way no drawn from the motors can occur. I'll keep the current switch position as well.
Thanks for your help. The next phase is to now buy the components and some how hook everything up. I think i will use a small bread board to make the diod and resistor circuit.
-Garrett
@robotmaker
The resistor in this circuit... is it a 1/2 W 680 ohm fuse? or 1 W?
-Garrett
not a fuse 1/2 watt resistor to set the charging current needed for the battery 1/4 watt still ok
Opps, sorry i mean't 1/2 watt 680 ohm resistor.
So which is better i guess? 1 watt, 1/2 watt or 1/4 watt?
-Garrett
doesnt matter,very low current