Motor causing BX24 to reset - possibly solved

Started by nathanchronister in BasicX14 years ago

Thanks everyone for your help with my problem when the motor was causing the processor to reset. I tried the capacitor idea, and...

Thanks everyone for your help with my problem when the motor was causing the processor to reset. I tried the capacitor idea, and it seemed to help some - but not completely. I was using a 4700uF cap, so a lot less than that other guy has. Then I tried lowering the PWM freq


Slow posting

Started by Tom Becker in BasicX12 years ago 3 replies

Odd. It's now 17:00 USEDT. The note I wrote about PWM, at 07:00 this morning - on the Yahoo group web site, like this one is being written -...

Odd. It's now 17:00 USEDT. The note I wrote about PWM, at 07:00 this morning - on the Yahoo group web site, like this one is being written - just appeared on the group with a timestamp of 12:00; the message is 10 hours delayed with a timestamp five hours late. Has anyone else seen this? Tom Yahoo! Groups Links


Potential BasicX User & Floating Point Math

Started by "liam.basicx" in BasicX11 years ago 2 replies

Hello, I stumbled across microcontrollers at Fry's a couple of years back. I purchased a Parallax kit and found it intriguing and fun. Then...

Hello, I stumbled across microcontrollers at Fry's a couple of years back. I purchased a Parallax kit and found it intriguing and fun. Then I discovered picaxe and became addicted with the enhanced basic commands, the built-in analog-to-digital converter, the background PWM control, the simplicity, and the price! All excellent for learning. The problem I have with both chips is the in...


accurate digital to analog conversion

Started by ricinecwh in BasicX12 years ago 4 replies

Dear all, I need to drive a pump laser of an EDFA( an optic device) by using the output of the BasicX. At begining , i had used the PWM...

Dear all, I need to drive a pump laser of an EDFA( an optic device) by using the output of the BasicX. At begining , i had used the PWM signal passing throught the low pass filter to do the DAC. However, the voltage ripple was too large which is about 8% of the output voltage which gives a large flucation in the pumplaser output Althought i had tried the RC circuit at 100kohm a...


MOSFET keeps burning out

Started by nathanchronister in BasicX14 years ago 11 replies

Hi. I'm using the BX24 to control a DC motor. I have the PWM output of the BX24 hooked up to an N-channel MOSFET. (I'm not using an...

Hi. I'm using the BX24 to control a DC motor. I have the PWM output of the BX24 hooked up to an N-channel MOSFET. (I'm not using an H- bridge because I don't need reverse.) Even though the MOSFET is rated 25 amps and should easily handle the motor current it keeps burning out. Aft


Pin 26 & Green LED

Started by new in BasicX14 years ago

I think I might have blown either the pin 26 or the LED.Using my BX-24 I was doing some PWM stuff and seeing how many amps it would...

I think I might have blown either the pin 26 or the LED.Using my BX-24 I was doing some PWM stuff and seeing how many amps it would take to stall the DC motor I want to use. ( just under 3 Amps ) anyway. Everything worked fine, and the next time I was running my normal Robot software, The Green LED didn't w


Motor Controller

Started by Mike Perks in BasicX13 years ago 6 replies

Hi, I have finally finished the documentation for my dual motor controller. It has the following features: * Uses L6205 dual...

Hi, I have finally finished the documentation for my dual motor controller. It has the following features: * Uses L6205 dual H-bridge driver that supports up to 2.8A and is in a 20 pin DIP package * On-board regulators for 12V and 5V power supplies * Driver logic for enable, sign/magnitude PWM and separate brake signal * Current sensing


problem with controlling a servo

Started by Michael Bloom in BasicX10 years ago 4 replies

hi, I pulled out my old BX24 to play with controlling a servo, and I am having some problems with it. I have a both a regular analog servo and...

hi, I pulled out my old BX24 to play with controlling a servo, and I am having some problems with it. I have a both a regular analog servo and a new digital servo, both are micro 9 gram servos. When I send a single position PWM to the servo it moves to that position OK, but when I try to have it move through a range of positions it messes up and just jumps around between two positions....


Vex: R/C signal generator

Started by Tom Becker in BasicX11 years ago 3 replies

For some time, I've been intending to assemble a joystick and processor to generate a standard R/C ~1.5mS/50Hz PWM stream. I did not need the...

For some time, I've been intending to assemble a joystick and processor to generate a standard R/C ~1.5mS/50Hz PWM stream. I did not need the RF link of a transmitter-receiver pair; I just wanted the receiver modulation output, in effect, a signal that can be easily read with the InputCapture function. As it happens, the Vex 6-channel R/C transmitter makes its transmitter modulation avai...


Brushless motor control with RC controller

Started by jdba...@tristate.edu in BasicX11 years ago 6 replies

Hi, I am trying to control an Atlas brushless motor using an Atlas Black motor controller. My problem is I do not know how to signal the motor...

Hi, I am trying to control an Atlas brushless motor using an Atlas Black motor controller. My problem is I do not know how to signal the motor controller correctly using Basicx. I know the motor controller uses PWM, but when I try to send a pulse the motor just beeps. I have read that the controller can have safety locks in place that can only be unlocked with certain signals. My question is: d...


Slow BLDD motor drive

Started by Tom Becker in BasicX12 years ago 6 replies

I'm trying to slowly drive a small 14-pole, 12-coil brushless outrunner motor via three channels of H-bridge and all three BX-24 PWM signals...

I'm trying to slowly drive a small 14-pole, 12-coil brushless outrunner motor via three channels of H-bridge and all three BX-24 PWM signals that synthesize three-phase sinusoidal signals. The PWMs directly connect to the H-bridge but, when filtered with a small RC, the three sines appear to be in proper phase at ~1Hz. Still, the motor rocks, apparently between two coil sets and does n...