Search found 1754 matches

by riden
Wed Mar 17, 2010 3:02 pm
Forum: SparkFun Product Questions
Topic: Older Weller soldering iron won't heat!
Replies: 5
Views: 1364

Re: Older Weller soldering iron won't heat!

Some Weller irons as part of the temperature control have a small spring loaded magnetic plate that the tip attracts. I have seen binding in the movement of the plate over time. If your iron is one of these, unscrew the end of the rod and carefully clean the tip and make sure that the mechanism work...
by riden
Mon Mar 15, 2010 6:46 am
Forum: SparkFun Product Questions
Topic: Need help about Olimex Pic-Web
Replies: 4
Views: 558

Re: Need help about Olimex Pic-Web

#1 is the expansion connector (the one with the I/O pins) and #2 is the ICSP programming connector. Here is a link to the pin outs of the expansion connector for the Rev A board:
by riden
Mon Mar 15, 2010 6:44 am
Forum: SparkFun Product Questions
Topic: Need help about Olimex Pic-Web
Replies: 4
Views: 558

Re: Need help about Olimex Pic-Web

#1 is the expansion connector (the one with the I/O pins) and #2 is the ICSP programming connector. Here is a link to the pin outs of the expansion connector for the Rev A board:

http://creativewidgetworks.com/cww/inde ... EB&art=200
by riden
Sat Mar 13, 2010 9:31 am
Forum: PIC Microcontrollers - Software and Hardware
Topic: New Cana Kit PIC Programmer - MPLAB
Replies: 4
Views: 1085

Re: New Cana Kit PIC Programmer - MPLAB

It looks like they designed the programmer to look like a PICKit2 to the Microchip software, so I would categorize it as a PICKit2 clone with ZIF sockets. If the ZIF sockets are the draw, you can buy a PICKit for $35 and add 28 pin and 40 pin ZIF sockets for $7 total from SparkFun and you'll be ahea...
by riden
Thu Mar 11, 2010 8:00 am
Forum: SparkFun Product Questions
Topic: Odd FT232RL question
Replies: 2
Views: 459

Re: Odd FT232RL question

No, I'm afraid not. The cables are designed to plug into a USB host. In order to get the functionality you desire, you would need to have a host that takes two USB inputs and then bridges them via the firmware in the host device.
by riden
Wed Mar 10, 2010 11:01 pm
Forum: Wireless/RF
Topic: An Interesting Problem for a Self-Proclaimed Newbie
Replies: 3
Views: 460

Re: An Interesting Problem for a Self-Proclaimed Newbie

You are correct that you can use those encoder/decoder pairs without a micro processor. I have used them and they work great. They should do the job for you. The nice thing is that they handle the random noise that the receiver picks up so you get a reliable decode. It really can't get much easier. ...
by riden
Wed Mar 10, 2010 9:27 pm
Forum: Wireless/RF
Topic: An Interesting Problem for a Self-Proclaimed Newbie
Replies: 3
Views: 460

Re: An Interesting Problem for a Self-Proclaimed Newbie

Congratulations on going to state competition with your team's design. I'm afraid that you won't be able to just connect the sensor to the transmitter and the LED to the receiver. As you may have surmised from reading the many posts on the forum, these tx/rx pairs need encoders/decoders in one form ...
by riden
Wed Mar 10, 2010 4:11 pm
Forum: SparkFun Product Questions
Topic: Physical Sudoku Puzzle (Ideas on managing 324 inputs?)
Replies: 1
Views: 396

Re: Physical Sudoku Puzzle (Ideas on managing 324 inputs?)

Very cool idea. I wouldn't mind receiving a box like that for a gift. It seems to me that a simple matrix would work. That way you only need to switch 81 rows. That can be done with 11 8-bit registers or 6 16-bit registers and lots of diodes (81 x 4). Each block would connect to a row output of the ...
by riden
Wed Mar 10, 2010 1:27 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: VU METER
Replies: 50
Views: 11819

Re: VU METER

waltr wrote:The LM3915 LED outputs are either on or off so are therefore digital. Look in the LM3915 data sheet, the outputs are current regulated open collector.
Since this is the case, couldn't one use the built-in weak pull-ups on PORTB of most PICs eliminating the need for the buffers?
by riden
Tue Mar 09, 2010 10:49 pm
Forum: SparkFun Site Questions/Comments
Topic: How to identify LTE-302 from LTR-301 ?
Replies: 4
Views: 3074

Re: How to identify LTE-302 from LTR-301 ?

Tnx Ralph from this I understand the RX (LTR-301 ) is the one with the Pink/Red small strip marking Am I correct ? because this is not "tinted Pink" as Sparkfun list. the part is clear with only small color marking on top surface. if this is true, they should be more specific like "Pink marking on ...
by riden
Tue Mar 09, 2010 12:03 am
Forum: SparkFun Site Questions/Comments
Topic: How to identify LTE-302 from LTR-301 ?
Replies: 4
Views: 3074

Re: How to identify LTE-302 from LTR-301 ?

Try having a look at this post on the Arduino forum:

http://www.arduino.cc/cgi-bin/yabb2/YaB ... 233960430/

Here is an image from that post that should help:

Image
by riden
Mon Mar 08, 2010 4:00 pm
Forum: SparkFun Product Questions
Topic: Need help about Olimex Pic-Web
Replies: 4
Views: 558

Re: Need help about Olimex Pic-Web

I use a PIC-WEB Rev A board and PD6 (RD6) is brought out to pin 14 of the expansion socket. It is a PIC i/o pin so you can set it as an output and driver or sink up to 25ma (logic 1 = 5v approx). The TCP/IP stack loaded on the board can make outgoing connections to a remote server (i.e., post data t...
by riden
Sun Mar 07, 2010 7:41 pm
Forum: SparkFun Product Questions
Topic: 555t + Not Gate + Hbridge = WTF?
Replies: 8
Views: 924

Re: 555t + Not Gate + Hbridge = WTF?

Check your design. It has at least three mistakes just on the 555 side... 1) The capacitor on the negative lead of the battery powering the 555 is not needed and will prevent the circuit from functioning properly. 2) You need a current limiting resistor (1k or so) from pin 3 of the 555 to the base o...
by riden
Sun Mar 07, 2010 9:14 am
Forum: SparkFun Product Questions
Topic: Repairing old elctronics
Replies: 7
Views: 722

Re: Repairing old elctronics

It turns on, the light works. The power indicator blinks for a second, then stays on. HOWEVER, when I plug in the usb, the lamp turns on, and the led turns off. The scanner isn't recognized by the computer. Any Ideas? Have you installed the drivers for this scanner on your computer? Go to the Epson...
by riden
Mon Mar 01, 2010 10:21 pm
Forum: SparkFun Product Questions
Topic: 3.5mm Audio Jack -- shorts the inputs when plug is inserted
Replies: 29
Views: 4588

Re: 3.5mm Audio Jack -- shorts the inputs when plug is inserted

Could I add a small surface-mount isolation transformer to each channel to isolate the headphones from the chip? What parameters of the transformers do I need to look for? As the chip is designed to directly drive a 32 ohm load, I have no idea if adding transformers will help or hurt you. I would t...