Search found 55 matches
- Fri Jan 26, 2007 4:36 am
- Forum: General Discussion
- Topic: looking for IC adaptor board..
- Replies: 18
- Views: 7451
Soldering Tip - When you finally get a PCB, tack 2 diagonal corners of the chip down. Then from the opposite corners QUICKLY run a fine blob down the entire side of the chip both sides. Use 0.9mm solder or finer. Then using De-Solder Wick, quickly suck up the excess solder. The surface tension shoul...
- Thu Jan 25, 2007 4:51 pm
- Forum: General Discussion
- Topic: can a PICAXE-08 be used as a oscillator
- Replies: 1
- Views: 1774
- Fri Sep 08, 2006 5:44 pm
- Forum: General Discussion
- Topic: microcontroller - which to pick?
- Replies: 3
- Views: 2533
The simplest way would be something like a PICAXE. They are a PIC micro re-marketed as a picaxe, have their own bootstrap loader built in, software is a free D/L and they only need a simple D/L circuit using 2 resistors. There are trade-offs e.g. less program memory, but the Picaxe Basic was designe...
- Wed May 10, 2006 8:39 am
- Forum: General Discussion
- Topic: Laser Power
- Replies: 7
- Views: 3526
A LASER Diode does not work quite like an ordinary LED. They usually need a constant current to function correctly. If you didn't get a Specs Sheet on the unit I would be doing a search on it or similar units and see exactly what supply they require. As you said they are expensive, would hate to see...
- Sat Apr 15, 2006 6:15 am
- Forum: General Discussion
- Topic: -JPKNHTP
- Replies: 11
- Views: 5369
- Tue Feb 21, 2006 10:00 pm
- Forum: General Discussion
- Topic: Peak Hold or Peak Follower OpAmp Ckt
- Replies: 9
- Views: 4242
Re: Peak Hold or Peak Follower OpAmp Ckt
I had a relay circuit in N&V APR 2005 p:50. The op amp circuit in there charges up a capacitor which turns on a small MOSFET to latch on a relay for a second or so (microphone version). This may work for what you want, just change the cap value and or the bleeder resistor on the MOSFET or omit t...
- Sun Feb 19, 2006 9:54 pm
- Forum: General Discussion
- Topic: Electronics switch
- Replies: 2
- Views: 1776
Re: Electronics switch
You can buy off the shelf devices called (SSR) Solid State Relays, they have a Triac inside which is switched via an optocoupler. LED voltage, input = 4 to 40V DC using current limiting resistor.(input usually 20mA MAX) They come in 2 standard forms usually - PCB mount which handle up to 3A 240V or ...
- Fri Feb 17, 2006 3:28 am
- Forum: General Discussion
- Topic: hobbist where did we all go
- Replies: 10
- Views: 4477
Re: hobbist where did we all go
There is a re-marketed PIC chip product. They call them a PICAXE. They made these simple enough for 12 year old students to program. It's still a Pic Micro, but it has a different interpreter actually loaded into the chip itself. They have written a new programming language that children can underst...
- Tue Jan 03, 2006 1:52 pm
- Forum: General Discussion
- Topic: Disposible camera flash project
- Replies: 5
- Views: 3006
Re: Disposible camera flash project
I was thinking the same thing,
Torturing an AA Cell like that.
Torturing an AA Cell like that.
- Fri Dec 30, 2005 3:19 pm
- Forum: General Discussion
- Topic: I get no respect from the hinges on my laptop
- Replies: 4
- Views: 2468
Re: I get no respect from the hinges on my laptop
Sounds like a bad earth/gnd connection, the hinge being the connection point. Maybe strip the hinges down and use graphite or ground up pencil lead instead of oil. Laptop hinges can be a pain, too lose and your screen slams shut, loo tight and stuff snaps off like motherboards, mountings etc. Its a ...
- Wed Dec 28, 2005 4:11 am
- Forum: General Discussion
- Topic: omnidirectional drive
- Replies: 2
- Views: 2190
Re: omnidirectional drive
Sometimes its useful to have a servo able to
fuly rotate or just keep going.
They can be stepped slowly, accurately, if
needed, FWD & REV,who could ask for more.
And all this on only 3 wires, Pos, Neg, CTRL.
fuly rotate or just keep going.
They can be stepped slowly, accurately, if
needed, FWD & REV,who could ask for more.
And all this on only 3 wires, Pos, Neg, CTRL.
- Fri Dec 23, 2005 2:37 am
- Forum: General Discussion
- Topic: Off-topic assistance, please ?
- Replies: 6
- Views: 2826
Re: Off-topic assistance, please ?
If using Internet Explorer later versions go to the Tool bar ^^^ up top select "Tools" -- Dropdown menu, last option - "Internet Options" -- under the General Tab middle of the window "Temporary Internet files' section select Settings try moving the Temp-Int-File to your des...
- Wed Dec 14, 2005 11:17 pm
- Forum: General Discussion
- Topic: Big job is 99% finished. Need the right flexible tubing
- Replies: 6
- Views: 2862
Re: Big job is 99% finished. Need the right flexible tubing
Running hot water through most rigid plastic
tubing does wonders to soften it.
tubing does wonders to soften it.
- Sat Dec 10, 2005 4:41 pm
- Forum: General Discussion
- Topic: Phone Speaker
- Replies: 3
- Views: 1879
Re: Phone Speaker
Is it actually a Dynamic Speaker e.g. Cone, Magnet and Coil or a Piezo Element ? If you can find another speaker to fit inside the case you have, just rip out the old one and replace it, use the same case. Some headphones may be a similar in size. The enclosed case may help the sound to be projected...
- Mon Dec 05, 2005 11:38 pm
- Forum: General Discussion
- Topic: Rebuilding Power Tool Battery Packs
- Replies: 6
- Views: 3324
Re: Rebuilding Power Tool Battery Packs
I have done a few of these for friends. Both phone packs and power tools. They are usually fiddly as hell. If you manage to crack the case open without too much damage you are half way there. Replacement batteries can be obtained with s/steel solder tags, you need to get that type mostly. You may al...