Search found 17 matches

I have now connected the fan grounds directly to the power supply rather than running it through the breadboard. This has worked perfectly - the fan induces no noise on the power lines at all now.

...

Thanks very much for your reply.

I tried connecting the fans to a different output on the power supply. However, due to the mosfet configuration this meant the fans were always on. I assume this i ...

Hi,

I'm building something along the lines of four fan controllers on an i2c net, with smoke and temperature sensors on the ADC pins, and MOSFETs being driven by LP filtered PWM outputs from a 16F8 ...

Fixed now. I've been very silly... got my MAX233 wiring messed up. Thanks for everyone's input.

Michael

Thanks for the suggestions. I've tried them out, but still to no avail I'm afraid.
The min/ max data rate is 50 - 2000 Hz, I thought 1 baud may be higher than 1 Hz as it involves transitions so kept ...

Excellent - thanks for that. Didn't realize that standard was inverted. It all becomes clear now.

Thanks again,

Michael

Hi,

Some electronics questions. I'm using a Garmin eTrex to interface with a PIC16F877, using the hardware UART, and it's corresponding RX pin.

1) The GPS provides 4V high, and a -3V(ish) low. I ...

After resetting the CREN bit too, it finally works. Thanks to everyone for your help. I'm off to bed.

Thanks very much for you help. I'll let you know if I get anywhere - might try the aforementioned alternative method.

I've tried using that function now, but it hasn't fixed it I'm afraid. I'll tinker some more.

Thanks both. I've used the clear_usart_receiver() function and it receives the first sentence fine, but the interrupt does not seem to come back on. I've use d the clear function just before enabling ...

Just had a thought - is there a way of clearing the receiver FIFO? Clearing RCREG perhaps? Seems to be an easier solution.

Thanks very much for that detailed explanation - helped a lot. I'll have a look at doing this as you mentioned beforehand.

Thanks for that. I'll have a look through that example.
I was thinking it shouldn't matter though, as a new sentence is only ever created when a $ is detected, and the data following that should then ...

Hi,

I know this topic has been done a lot, but I couldn't find an answer to this specific problem. I'm trying to buffer NMEA sentences from a GPS to eventually extract the lat/long. At the moment I ...