Search found 290 matches

by hlreed
Tue Jan 13, 2004 10:16 am
Forum: Computer Programming
Topic: Tell me what do you think
Replies: 1
Views: 1133

Re: Tell me what do you think

I think a picture page would be of more interest.
by hlreed
Mon Jan 12, 2004 10:37 am
Forum: Robotics
Topic: Java Stamps
Replies: 1
Views: 1391

Re: Java Stamps

I would not use either language on a microcontroller. Assembler is short and easy on all of them, making it easy to learn. You avoid another layer of trouble.
by hlreed
Thu Jan 08, 2004 9:49 am
Forum: Robotics
Topic: Pic Programmer kits
Replies: 6
Views: 2928

Re: Pic Programmer kits

Go to DigiKey and buy yourself a PICSTART which will get you a programmer, assembler and everything you need. Microchip has lots of stuff and you can download everything from their web site.<p>http://www.digikey.com<p>http://www.microchip.com
by hlreed
Thu Jan 08, 2004 9:40 am
Forum: Robotics
Topic: DC Motor speed control help
Replies: 8
Views: 4204

Re: DC Motor speed control help

The frequency is derived from the duty cycle. It is from the cycling of the program that feeds the H-Bridge. The on-off time produces the frequency. It will select itself from the cycle of on- off times. 100% is DC. You cannot do that since there is off time in your program, so 100% may be actually ...
by hlreed
Wed Jan 07, 2004 10:12 am
Forum: Robotics
Topic: DC Motor speed control help
Replies: 8
Views: 4204

Re: DC Motor speed control help

Don't worry about frequency. Think of motor on time percentage. At full speed, motor time on is 100%. At half speed, motor on time is 50% on and so on. At 0 speed motor time on is 0%. Any DC motor is mathematically the same here.<p>The actual time depends on the size of the number you are using for ...
by hlreed
Mon Jan 05, 2004 1:04 pm
Forum: Robotics
Topic: DC Motor speed control help
Replies: 8
Views: 4204

Re: DC Motor speed control help

Feed the motor with an integer. Then sign controls direction of run and magnitude is speed to run. Say you have an 8 bit integer. The pulse width is time on and time off. Call them TON and TOFF. TOFF is always off, so it can be replaced with DIR. Call the integer magnitude I. If I is 127 TON is on 1...
by hlreed
Sat Dec 13, 2003 12:31 pm
Forum: Robotics
Topic: The primative logic operators
Replies: 5
Views: 2306

Re: The primative logic operators

Hi Al, I have a set of nodes that emit either a number or 0 depending on condition. These have two inputs I and R. Out = I if I cond R else Out = 0 cond is one of the 16 operators above. Most of them are redundant or useless. So if cond = {=, >, <} this gets lines and ramps in both direction. >= can...
by hlreed
Sat Dec 13, 2003 9:55 am
Forum: Robotics
Topic: The primative logic operators
Replies: 5
Views: 2306

Re: The primative logic operators

Exclusive OR, XOR is not primative. It is made from two bit conditions. It has to look at two bits.<p>There are 16 multi bit logic operators. They can be numbered and treated like numbers.<p>A B | pair name 0 0 | Z 0 1 | L 1 0 | G 1 1 | E<p>Z L G E 0 0 0 0 Zero (0 bits) 0 0 0 1 AND (1 bit) 0 0 1 0 G...
by hlreed
Fri Dec 12, 2003 10:05 am
Forum: Robotics
Topic: The primative logic operators
Replies: 5
Views: 2306

The primative logic operators

There are lots of logic operators, but there are only 4 that are single bit. From A and B: A B | E G L Z 0 0 | 0 0 0 1 0 1 | 0 0 1 0 1 0 | 0 1 0 0 1 1 | 1 0 0 0<p>The primative operators are E,G,L and Z E = A = B ;this is an AND G = A > B ;not in current bit logic L = A < B ;not in current bit logic...
by hlreed
Fri Dec 12, 2003 9:51 am
Forum: Computer Programming
Topic: VB1 Help file
Replies: 3
Views: 1786

Re: VB1 Help file

VB1 is probably for windows 3.1
Help file format changed from then.
Just guessing.
by hlreed
Tue Dec 09, 2003 9:16 am
Forum: Robotics
Topic: IS, WAS and maybe
Replies: 4
Views: 2030

Re: IS, WAS and maybe

That is better. Note that all these equations are separate computers. Each equation is a computer. I and R are internal names of the inputs of all nodes. I've been on here so long I thought everyone knew that.<p>AISB = A IS B AWASB = A WAS B AWILLBE = AISB IS AWASB<p>The code for was is:<p>WasNode M...
by hlreed
Mon Dec 08, 2003 9:16 am
Forum: Robotics
Topic: IS, WAS and maybe
Replies: 4
Views: 2030

Re: IS, WAS and maybe

Is that a yes, no, maybe, don't know, don't care or other answer. I know from the face that it is supposed to be funny. That however is the only indicator.
by hlreed
Fri Dec 05, 2003 1:46 pm
Forum: Robotics
Topic: IS, WAS and maybe
Replies: 4
Views: 2030

IS, WAS and maybe

Let node have I,R as inputs and Out as output. M is an internal variable.<p>IS is Out = I if I = R else Out = 0 WAS is Out = If I = R, M = I, Out = M<p>Truth table M is 0 I R IS WAS 0 0 0 0 0 1 0 0 1 0 0 0 1 1 1 1 0 0 0 1 0 1 0 1 ...<p>Let A and B be events or objects AISB = A is B AWASB = A was B M...
by hlreed
Thu Dec 04, 2003 9:52 am
Forum: Computer Programming
Topic: thermister formula
Replies: 9
Views: 3465

Re: thermister formula

Eddie,
You do not need to know the formula since you have a table, converting ohms to temperature.
I would convert the ohms to volts, use a PIC that has ADC and output the temperature from an internal volts to temperature table.
by hlreed
Tue Nov 25, 2003 1:54 pm
Forum: General Discussion
Topic: How to Read Schematics?
Replies: 15
Views: 3304

Re: How to Read Schematics?

Zeek, understand that schematic and pcboard layout are different views of the same subject. In order to build from a schematic, you must lay out a board that you can them plug your components into and solder them. Nothing can be made from a schematic except a pc board. You can also use sockets and w...