Search found 44 matches

by 60amp_relay
Mon Jun 01, 2015 4:35 pm
Forum: SparkFun Product Questions
Topic: Using Tiny AVR programmer with C/C++ and HVSP
Replies: 2
Views: 317

Re: Using Tiny AVR programmer with C/C++ and HVSP

If you want to use C programs, you'll probably want to go with something more general-purpose. I use the Adafruit USBTinyISP, and SparkFun has a similar product: https://www.sparkfun.com/products/9825 HVSP is a difficult way to start off - if you are comfortable building your own emitter-follower ci...
by 60amp_relay
Mon Jun 01, 2015 4:19 pm
Forum: SparkFun Product Questions
Topic: Silent motors for robot
Replies: 5
Views: 431

Re: Silent motors for robot

The Actobotics/RobotZone precision gearmotors are amazingly quiet. https://www.sparkfun.com/categories/247
by 60amp_relay
Sat Sep 04, 2010 5:56 am
Forum: SparkFun Product Questions
Topic: Switching Voltage Regulator question
Replies: 3
Views: 476

Switching Voltage Regulator question

I'm trying to figure out which parts I need to make a switching +5V voltage regulator. Up to this point, I've always used an LM7805 linear regulator, which works great at low currents. But the current draw on my latest project is around 0.8A. The LM7805 generates too much heat in this situation, and...
by 60amp_relay
Mon Aug 16, 2010 7:34 pm
Forum: SparkFun Product Questions
Topic: Power Supply - Can It Be Done ?
Replies: 14
Views: 1087

Re: Power Supply - Can It Be Done ?

Just set the adjustable output to +10V, and use the fixed +5V as your ground.
by 60amp_relay
Mon Aug 16, 2010 7:25 pm
Forum: SparkFun Product Questions
Topic: New Project-Automotive. Need a little help
Replies: 13
Views: 1806

Re: New Project-Automotive. Need a little help

The Parallax Basic Stamp is an easy way to get started with microcontrollers (which is eventually what you want here) The trouble is I don't know of a direct way to read an analog voltage using the Stamp. I suppose you could use a discrete ADC, like an ADC0831CCN or something similar, but in that ca...
by 60amp_relay
Sun Aug 08, 2010 7:23 pm
Forum: SparkFun Product Questions
Topic: SSR relay question
Replies: 4
Views: 465

Re: SSR relay question

I use the Sharp brand of the same thing. You'll need to have an actual AC load on the relay with a zero-crossing in order to measure the output. A multimeter alone won't do it - you need a 60W wall lamp or something similar that's actually drawing some power. Make sure to have a resistor on the cont...
by 60amp_relay
Mon Jul 19, 2010 5:40 pm
Forum: Wireless/RF
Topic: USB Bluetooth on Ubuntu - Issues with Roving Networks BT
Replies: 3
Views: 1914

Re: USB Bluetooth on Ubuntu - Issues with Roving Networks BT

Worked like a charm! I was having the same problem under Ubuntu 9.04, and your mini-howto solved the problem for me. Thanks for posting these instructions.
by 60amp_relay
Fri Jul 16, 2010 6:16 pm
Forum: SparkFun Product Questions
Topic: Basic 16x2 Character LCD Project - Compatability Question
Replies: 4
Views: 910

Re: Basic 16x2 Character LCD Project - Compatability Question

At a glance, it looks like it would work. The only problem I see is that the molex connector doesn't seem to have a connection for the LCD backlight. (where are pins #15 and #16?) Other than that, my semi-educated guess is that it would be compatible.
by 60amp_relay
Thu Jul 01, 2010 2:57 pm
Forum: BatchPCB
Topic: 2nd time in a row...
Replies: 1
Views: 873

Re: 2nd time in a row...

My condolences. I feel your pain...literally. I had a similar experience, and apparently others have, too. http://forum.sparkfun.com/viewtopic.php?f=16&t=21870 http://forum.sparkfun.com/viewtopic.php?f=16&t=21261 http://forum.sparkfun.com/viewtopic.php?f=16&t=21654 I'd be curious to know if you're s...
by 60amp_relay
Mon Jun 28, 2010 6:47 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: Compile fails when memory only 3/4th full
Replies: 2
Views: 533

Re: Compile fails when memory only 3/4th full

Interesting, I hadn't considered that. Thanks for making that suggestion, I'll check it out.
by 60amp_relay
Mon Jun 28, 2010 4:00 pm
Forum: PIC Microcontrollers - Software and Hardware
Topic: Compile fails when memory only 3/4th full
Replies: 2
Views: 533

Compile fails when memory only 3/4th full

Hi guys, I've had this problem bugging me for a while, and I'm hoping it's something you'll know how to solve. I'm using the MPLAB IDE with the free Hi-Tech C 9.70 compiler. I'm using the 16F630 with 1Kw of flash. Everything works fine until my program gets up to about 768 words, or 3/4th the size o...
by 60amp_relay
Tue Jun 22, 2010 6:52 pm
Forum: SparkFun Product Questions
Topic: Burning Man project...
Replies: 5
Views: 650

Re: Burning Man project...

If you are ok with simply alternating between two colors, or alternating between adjacent groups of LEDs, it's pretty straightforward. A simple astable multivibrator circuit and a few power transistors would do it. The next big jump in complexity would be to use some kind of programmable microcontro...
by 60amp_relay
Mon Jun 21, 2010 7:02 pm
Forum: Wireless/RF
Topic: RF Tx/Rx units - any fault finding advice?
Replies: 17
Views: 3036

Re: RF Tx/Rx units - any fault finding advice?

How come you're using +4V to power the receiver? The (admittedly shoddy) datasheet says +4.5V is the bare minimum on Vcc, with +5V recommended. You can use the unit with only one Vcc, Gnd, and Data pin connected. It's OK to leave the others disconnected, it still works fine. But the range is only a ...
by 60amp_relay
Sun Jun 20, 2010 5:56 pm
Forum: Wireless/RF
Topic: RF Tx/Rx units - any fault finding advice?
Replies: 17
Views: 3036

Re: RF Tx/Rx units - any fault finding advice?

This is something that trips up a lot of people. You need to have a low->high or high->low transition on the transmitter's data line at least once every 30ms or so. If you simply output a constant "1" on the transmitter, you'll get 30ms of "1" on the receiver and then a stream of garbage. In your pr...
by 60amp_relay
Wed Jun 16, 2010 5:45 pm
Forum: SparkFun Site Questions/Comments
Topic: Getting started
Replies: 5
Views: 1266

Re: Getting started

It all depends on what you want to do, but I frequently find the following useful: - Largest breadboard you can find - +5v voltage regulator and a +12v wall-wart* - Assortment of breadboard jumper wires - Assortment of resistors 10, 100, 220, 500, 1K, 2.2K, etc. up to 100K - Assortment of capacitors...