Electronic projects

RC motor on a electric car, go kart.

2012-09-19T11:48:00.000-07:00

In the following you can see me finding a good position for the motor.

After i found a good position for the motor i passed to making the DC Brushless controller.

Now the first tests with the new brushless controller: 80Amp 24V

Quadrocopter

2012-09-18T08:18:00.002-07:00

Acest coadrocopter este facut din cadru de carbon. Zona unde zburam este langa Obi berceni. Aici este a 2-a versiune unde i-am pus emitator video si camera video.

DC Motor Speed Controller PWM 0-100% 400Hz – 3khz Freq

2012-09-18T07:43:00.003-07:00

This is the best cheapest DC motor speed controller circuit that you can find on internet.
In the past i tried wit NE555 and other circuits but the results were every time in shorted mosfet`s and not stoppable GO KART (not very good thing when you do not have a big red kill switch).
In in the following i will present my DC Motor speed controller capable of adjusting speed (PWM) form 0 – 100% and the frequency form ~ 400Hz to 3kHz, based on LM339 comparator.
The power supply is from 14-30volts, expandable to practical any value with little modification.
From R15 VR 10k you can adjust the speed from 0 -100%
From R14 VR 100k you can adjust the frequency.
If the jumper JP1 is shorted you can adjust the PWM frequency from 400Hz to 3kHz. If jumper is open Freq is fixed at 100Hz.
The circuit is designed in Eagle cad 6.2

You can use almost any Channel N mosfet`s you want. The fets will be mounted on a radiator if the current is higher than 2-5 amp.
It is possible to increase the voltage supply to any value if you separate the power to the logic circuit from power to the load and mosfet`s
This is my second prototype of dc motor controller

Depending on Rds ON value of the mosfet`s you will need a smaller or bigger radiator.
The wires will be at least 12 AWG for a 30 -35 amp load.
For any questions you can ask me any time via my e-mail found on about menu.
Success with the circuit.

New Brushless controller for the electric scooter and go kart

2012-09-18T06:44:00.000-07:00

Hi,
I just finished a new controller for my electric scooter project.
The current is limited to 50Amp but it can sustain at least 80Amp.
It is also based on Mc33035 IC and it is capable to decode signal from the hall sensors.

Now i`m also building a new Go kart controller.I will use the same logic board as the scooter.
The board was designed in Eagle Cad:

I used photo resist PCB to make the circuit :

After that i used Ferric Chloride etchant to remove all the unnecessary cooper.

And the result was :

Here is a picture of my Homemade Electric Go Kart: