Search found 85 matches

by rstofer
Sun Aug 07, 2005 7:43 am
Forum: Computer Programming
Topic: IR Remote decode blues
Replies: 10
Views: 4459

Re: IR Remote decode blues

I guess having all of the prebuilt code is quite useful. I just want to use IR decode, I don't want to invent it and for simple IR controlled toys the little 14 pin Perseus is very handy. I have a hexpod using this and a couple of track type toys using the DIOS chip although Perseus would work.<p>Th...
by rstofer
Fri Aug 05, 2005 8:19 am
Forum: Computer Programming
Topic: IR Remote decode blues
Replies: 10
Views: 4459

Re: IR Remote decode blues

There are MANY different encoding schemes so select the remote you want to use first.<p>There is one scheme where the data stream is quite long and contains the complement of the data as part of the string.<p>Most codes start with a device code followed by a command sequence.<p>The fastest way to ge...
by rstofer
Thu Aug 04, 2005 5:25 pm
Forum: General Discussion
Topic: car jumper cable question
Replies: 9
Views: 2152

Re: car jumper cable question

Passing over the safety issues, for a 3000W inverter at, say 80% efficiency to run off a 12V battery takes 3000 / (12 * 0.8) amps -> 312.5 amps.<p>Unless you have a GIGANTIC battery system, the battery won't last even a minute! And, automotive batteries are designed to provide high current for an ex...
by rstofer
Fri Jul 29, 2005 6:12 pm
Forum: General Discussion
Topic: Ramp Start Devices
Replies: 9
Views: 1956

Re: Ramp Start Devices

Most small tools like routers use universal motors - those with brushes. These are just DC motors and respond quite well to speed control via voltage. So, they use a PWM (pulse width modulation) to vary the voltage to the armature.<p>AC induction motors don't change speed by changing voltage - you h...
by rstofer
Sun Jul 24, 2005 9:29 pm
Forum: General Discussion
Topic: X-Channel Analog-to-Digital Converter
Replies: 2
Views: 1136

Re: X-Channel Analog-to-Digital Converter

I have found the device datasheets to be very specific. But you have to read carefully...<p>Yes, for some PICs various inputs to the A/D converter can remain digital. There are three things you need to read: The specific A/D section of the datasheet for the device you are using. The Mid-Range MCU Fa...
by rstofer
Sun Jul 24, 2005 9:05 am
Forum: General Discussion
Topic: MERC - V. REG. OUTPUT
Replies: 12
Views: 4738

Re: MERC - V. REG. OUTPUT

No, the voltage doesn't jump. I would look at the measurements again. How do you know the batteries are charging? Just because they have voltage? Or are you measuring the current and direction?
by rstofer
Sun Jul 24, 2005 9:01 am
Forum: General Discussion
Topic: foreign volts
Replies: 7
Views: 2247

Re: foreign volts

You can buy 'travel adapters' that will convert the plug and voltage. They won't, of course, change the frequency.<p>Try Google or Radio Shack
by rstofer
Thu Jul 21, 2005 7:03 pm
Forum: General Discussion
Topic: Drawing Schematic's Circuitary Diagram
Replies: 13
Views: 4278

Re: Drawing Schematic's Circuitary Diagram

I use the free software from ExpressPCB. One component is for drawing schematics and the other for laying out PCBs
by rstofer
Thu Jul 21, 2005 1:37 pm
Forum: General Discussion
Topic: MERC - V. REG. OUTPUT
Replies: 12
Views: 4738

Re: MERC - V. REG. OUTPUT

I would put it back in the factory configuration and then measure the voltage with the motor running.<p>If I had to guess, I would guess the alternator has run without a battery and the alternator diodes are toast. But that is just a guess.
by rstofer
Wed Jul 20, 2005 6:54 pm
Forum: General Discussion
Topic: Google Mapping and the Moon
Replies: 9
Views: 3115

Re: Google Mapping and the Moon

Did you zoom way in? Very interesting!
by rstofer
Tue Jul 19, 2005 5:59 pm
Forum: General Discussion
Topic: Automobile Inverters
Replies: 11
Views: 4206

Re: Automobile Inverters

Large inverters such as you propose are used on sailboats all the time. But, then, they use very large storage batteries and maybe run for an hour. Oh, and huge, but very short, wire.<p>The average auto alternator might put out 30 amps or about 360 watts. Maybe there are a few on luxury cars that ar...
by rstofer
Sat Jul 16, 2005 9:12 pm
Forum: General Discussion
Topic: laser wire stripper?
Replies: 9
Views: 3593

Re: laser wire stripper?

There are certainly thermal strippers. They just use a hot wire to melt the insulation.<p>I haven't seen anything that uses a laser.
by rstofer
Sat Jul 16, 2005 11:34 am
Forum: General Discussion
Topic: keyboard
Replies: 12
Views: 2877

Re: keyboard

See the first post - the button image can be changed.
by rstofer
Thu Jul 14, 2005 3:20 pm
Forum: General Discussion
Topic: keyboard
Replies: 12
Views: 2877

Re: keyboard

It is certainly possible. I have seen those graphic buttons advertised for industrial controls.<p>However, I'll bet this is one expensive piece of equipment! Maybe in the several thousand dollar bracket.<p>No results searching for Optimus PC Keyboard on google.
by rstofer
Thu Jul 14, 2005 1:03 pm
Forum: General Discussion
Topic: Single-Three phase current
Replies: 1
Views: 717

Re: Single-Three phase current

Of course! If the neutral conductor is present the panel can support single phase loads. For example, a 208/120V 3ph wye connected panel will support 3 ph 208, single phase 208 and single phase 120V loads and the breakers can be installed in any position.<p>A 240/120V 3 phase open delta panel can su...