Search found 44 matches

by 60amp_relay
Mon Jun 14, 2010 5:49 pm
Forum: Wireless/RF
Topic: ESD warning for RF receiver modules
Replies: 2
Views: 610

Re: ESD warning for RF receiver modules

Just wanted to post back confirming that the new RF Link receivers work great, whereas the old ones were only receiving garbage or had a very small range. I guess I must have zapped my receivers one time too many when plugging in the antenna.
by 60amp_relay
Sun Jun 13, 2010 3:26 pm
Forum: SparkFun Product Questions
Topic: ATMega168 RS232 Not Working
Replies: 4
Views: 658

Re: ATMega168 RS232 Not Working

Just a quick thought, have you turned off Hardware Flow Control on the serial port? I've tripped on that little detail several times.
by 60amp_relay
Sat Jun 12, 2010 10:40 am
Forum: SparkFun Product Questions
Topic: Transistor Question
Replies: 10
Views: 906

Re: Transistor Question

I'm guessing what you really want is a voltage comparator, like an LM311.
by 60amp_relay
Sat Jun 12, 2010 10:26 am
Forum: BatchPCB
Topic: How Long?
Replies: 9
Views: 2037

Re: How Long?

Tin/lead pads are fine. It's what I use on all my boards. The only reason to change that is if you need to use silver for RoHS compliance or something.
by 60amp_relay
Wed Jun 09, 2010 7:20 pm
Forum: Wireless/RF
Topic: ESD warning for RF receiver modules
Replies: 2
Views: 610

Re: ESD warning for RF receiver modules

Interesting - thanks for this info. I'm using these same modules and am noticing their performance degrading over time. I'll try getting a new set and soldering in diodes between the antenna and ground like you suggest.
by 60amp_relay
Wed Jun 09, 2010 2:46 pm
Forum: Wireless/RF
Topic: USB RF Transmitter Dongle
Replies: 10
Views: 7545

Re: USB RF Transmitter Dongle

That's a picture of my own breadboard - I've been using the ft232rl and rflink parts a lot lately, so I just snapped a photo and uploaded it. The mini-USB connector on the ft232rl breakout board is a surface-mount part. I'm not sure how easy it would be to unsolder it, and you couldn't really put a ...
by 60amp_relay
Tue Jun 08, 2010 5:24 pm
Forum: Wireless/RF
Topic: USB RF Transmitter Dongle
Replies: 10
Views: 7545

Re: USB RF Transmitter Dongle

So far, the best way I've found is to buy the pre-assembled breakout board: http://www.sparkfun.com/commerce/produc ... cts_id=718. You'll need to configure it for +5V by unsoldering the +3.3V jumper.

Here's an example on a breadboard (attached).
by 60amp_relay
Tue Jun 08, 2010 4:40 pm
Forum: Wireless/RF
Topic: USB RF Transmitter Dongle
Replies: 10
Views: 7545

Re: USB RF Transmitter Dongle

I like it. You'll need one more piece to complete the puzzle: http://www.sparkfun.com/commerce/product_info.php?products_id=650 The USB protocol is too high-level (and too fast) to send directly over that transmitter. What the FT232RL chip does is encapsulate all the USB stuff and simplify it down t...
by 60amp_relay
Tue Jun 08, 2010 4:31 pm
Forum: SparkFun Product Questions
Topic: Missing Parallel Port
Replies: 6
Views: 689

Re: Missing Parallel Port

Would a serial port suffice? I use this to do all my PIC programming:

http://www.newegg.com/Product/Product.a ... 6812149115

I've never used WinAVR before, but the tutorial mentions using a serial or a parallel port - I'm assuming that means either would work.
by 60amp_relay
Thu Jun 03, 2010 5:32 pm
Forum: Code Snippets
Topic: Software PWM resources
Replies: 7
Views: 5670

Re: Software PWM resources

Here's how I normally do it. Unfortunately, this method uses up a lot of CPU time, but if all you need is a quick & dirty solution, this is it. The following is written from memory because I don't have any examples handy, so there may be a bunch of little mistakes, but hopefully it shows you the gen...
by 60amp_relay
Tue Jun 01, 2010 2:51 pm
Forum: Arduino
Topic: RC Car Controlled by Arduino and Xbox360 Controller
Replies: 17
Views: 11886

Re: RC Car Controlled by Arduino and Xbox360 Controller

Awesome! I see the L298N :)
by 60amp_relay
Mon May 31, 2010 10:05 am
Forum: Wireless/RF
Topic: WRL-08949 - RF Link 2400bps Receiver - 434MHz problems
Replies: 2
Views: 801

Re: WRL-08949 - RF Link 2400bps Receiver - 434MHz problems

I DON'T have the 5v of the FTDI Basic Breakout wired to the 5v rail supplying the receiver. I bet this is the source of the trouble. You're mixing multiple (and slightly different) +5V power supplies across devices. To get this to work, you'll probably need to run the RFLink Receiver directly from ...
by 60amp_relay
Sun May 30, 2010 8:29 pm
Forum: PCB Design Questions
Topic: [Solved] Eagle autorouter and 0.65mm + 50mil devices
Replies: 3
Views: 912

[Solved] Re: Eagle autorouter and 0.65mm + 50mil devices

That worked perfectly! By setting the autorouter to 0.02mm, it gets the traces centered nicely on all the pads. Thanks for the suggestion.
by 60amp_relay
Sun May 30, 2010 3:15 pm
Forum: PCB Design Questions
Topic: [Solved] Eagle autorouter and 0.65mm + 50mil devices
Replies: 3
Views: 912

[Solved] Eagle autorouter and 0.65mm + 50mil devices

Hi guys, This has got to be a simple problem, but for the life of me I can't figure out how to solve it. I'm trying to layout a PCB in Eagle that has both 0.65mm (TSSOP) and 50mil (SOIC) surface-mount parts. The autorouter only lets me pick one or the other. If I use 0.65mm, then the TSSOP traces li...
by 60amp_relay
Sun May 30, 2010 9:20 am
Forum: SparkFun Product Questions
Topic: Tamiya Dual Gear Box
Replies: 3
Views: 595

Re: Tamiya Dual Gear Box

You could try using a L298N. Those are a lot more beefy than the one you're using now. Just be aware that the pin spacing on this IC is 0.05, so it takes some elbow-grease to finagle it into a breadboard.