Speed Control PWM Voltage/Frequency

[Mitch]

I know, but always striving for the simple and elegant solution!

[Flying_Teapot]

Tom,

I think I'm experiencing the same problem described by Mitch. I put 4 x BLC Turnigy Plush 25A on my quad. Those connected on port #1 and #2 seems to be connected to nothing. I did check with a scope signal quality on all ports. Everything is ok and the duty cycle varies with stick position. Your opto-isolator card will be more than welcome as I'm a bit stuck for the time being.

Pierre

[Tom]

Hi Pierre,

I'm very sorry to see you're having the same problem...

I can offer you 2 solutions:
- You buy http://store.diydrones.com/product_p/br-0003-20.htm
- You give me 2 weeks time and I sell you a self made version

Best regards,

Tom

[Flying_Teapot]

Tom,

No worries. I can wait 2 weeks your version. In the meantime I'll give a try with i2c-pwm converters I got some time ago. I already started to modify control.c file for that.

Pierre

[Tom]

Maybe you better write an alternate "servo_i2c.c" that implements "servo.h" to replace servo.c ?

[Flying_Teapot]

You're absolutely right. The time I do that your opto card will be available

[Flying_Teapot]

Tom,

as my converters are based on an ATMega8 powered with 5v I was wondering if i2c lines on the dsPic33 are 5v tolerant. I prefer double check before connecting both world.

[Tom]

Yes they are

SJ1 allows you to select 3V3 or 5V (for both VCC and pullups of I2C) - see the schematic.

It would be really cool if you could make the I2C to PWM board work! Unlimited PWM outputs

Tom