# Search:

Type: Posts; User: Aaron2

1. ## Thread: Help Identify a plastic flanged/wall mount enclosure.

by Aaron2
Replies
2
Views
4,195

### [SOLVED]Closed: Re: Help Identify a plastic flanged/wall mount enclosure.

I found it!

Its is a Bud CU-1941-MB....
2. ## Thread: Help Identify a plastic flanged/wall mount enclosure.

by Aaron2
Replies
2
Views
4,195

### [SOLVED]Closed: Help Identify a small plastic flanged/wall mount enclosure.

I'm struggling to identify the manufacturer of small plastic flanged(wall mount) enclosure.

The dimensions: ~82mm x 54mm x 30mm (3.2" x 2.1" x 1.2").
Features: Hidden screws on flanged lid,...
3. ## Thread: [Moved]: cleaning pcb boards with petrol

by Aaron2
Replies
4
Views
12,021

### Closed: Re: [Moved]: cleaning pcb boards with petrol

My company uses 90% Isopropyl alcohol and acrylic lacquer thinner.
4. ## Thread: Understanding a Delay, for(j=0;j<1275;j++);, Crystal freq & 1275, 8051

by Aaron2
Replies
9
Views
9,917

### Closed: Re: Understanding a Delay, for(j=0;j

But my line of questions seems like a logical progression of my original question discussion as it affects the cycle divisor ratio referenced in the first reply. I will create a...
5. ## Thread: Understanding a Delay, for(j=0;j<1275;j++);, Crystal freq & 1275, 8051

by Aaron2
Replies
9
Views
9,917

### Closed: Re: Understanding a Delay, for(j=0;j

So the cycle divisor ratio I have been using above formula is 12 (with STC11F16XE).

The spec sheet of the STC11F16XE states:

The STC89C54RD+ spec states:
6. ## Thread: Understanding a Delay, for(j=0;j<1275;j++);, Crystal freq & 1275, 8051

by Aaron2
Replies
9
Views
9,917

### Closed: Re: Understanding a Delay, for(j=0;j

So with these facts in mind, I must ask why two different 8051 compatible MCUs (STC11F16XE, STC89C54RD+) would have a wildly different reaction to these basic Delay functions.

ie. Using a...
7. ## Thread: Understanding a Delay, for(j=0;j<1275;j++);, Crystal freq & 1275, 8051

by Aaron2
Replies
9
Views
9,917

### Closed: Re: Understanding a Delay, for(j=0;j

Yes, I transposed the crystal frequency, it is the common 11.0592 mhz.

So the Engineer's Garage link I referenced failed to display the 1.079us (one machine cycle time) in his formula.

So why...
8. ## Thread: Understanding a Delay, for(j=0;j<1275;j++);, Crystal freq & 1275, 8051

by Aaron2
Replies
9
Views
9,917

### Closed: Understanding a Delay, for(j=0;j&lt;1275;j++);, Crystal freq &amp; 1275, 8051

I see countless uses of this basic Delay, usually for milliseconds.

void delay(int ms) //Produces a delay in msec.
{
int i,j;
for(i=0;i<ms;i++)
for(j=0;j<1275;j++);
}
9. ## Thread: I2C program file problem with 8051

by Aaron2
Replies
6
Views
1,573

### Closed: Re: I2C program file problem with 8051

In this code I'm trying to determine what the:

sbit en1=P2^7;
is referring to. An LED state, indicator? Used in place of an int value maybe?

#include<intrins.h>
#include<reg51.h>
sbit...
10. ## Thread: countdown_timer.c(119): error C100: unprintable character 0x97 skipped

by Aaron2
Replies
6
Views
3,702

### Closed: Re: countdown_timer.c(119): error C100: unprintable character 0x97 skipped

The code I'm working on was in a project located here: https://electronicswork.wordpress.com/2012/10/11/digitalclock/

I'm using Keil uVision4, I thought it should be reliable.
11. ## Thread: countdown_timer.c(119): error C100: unprintable character 0x97 skipped

by Aaron2
Replies
6
Views
3,702

### Closed: Re: countdown_timer.c(119): error C100: unprintable character 0x97 skipped

I have this same problem with unprintable character 0x96 on build, in the below code.
So I updated the code from h-; to h--;

Clock_Cal1.c(183): error C100: unprintable character 0x96 skipped...

by Aaron2
Replies
7
Views
1,642

Thanks Milan
13. ## Thread: 1602 LCD Row & Col Question, 8051 LCD Demo test in C.

by Aaron2
Replies
7
Views
1,642

### [SOLVED]Closed: Re: 1602 LCD Row & Col Question, 8051 LCD Demo test in C.

I'm creating a fresh one from scratch.
14. ## Thread: 1602 LCD Row & Col Question, 8051 LCD Demo test in C.

by Aaron2
Replies
7
Views
1,642

### [SOLVED]Closed: Re: 1602 LCD Row & Col Question, 8051 LCD Demo test in C.

My initial post displays the Demo Code I referred to (that you commented on previously). My question is also given. I'm Sure the example is not working properly.

I'm trying to learn C, and basic...
15. ## Thread: 1602 LCD Row & Col Question, 8051 LCD Demo test in C.

by Aaron2
Replies
7
Views
1,642

### [SOLVED]Closed: Re: 1602 LCD Row & Col Question, 8051 LCD Demo test in C.

I thought I understood the DisplayListChar function.

I found this format (Col-X, Row-Y) in the original demo code, matching function, not working.

DisplayListChar(4, 0, "Line 1"); // original...
16. ## Thread: 1602 LCD Row & Col Question, 8051 LCD Demo test in C.

by Aaron2
Replies
7
Views
1,642

### [SOLVED]Closed: 1602 LCD Row & Col Question, 8051 LCD Demo test in C.

I'm trying to learn what I'm doing wrong with simple demo C code to display two lines of text on a 1602 LCD display.

Whatever (Col, Row) I select everything stays on row 1. See section 'Display...
17. ## Thread: Anyone using MCU 8051 IDE??

by Aaron2
Replies
1
Views
885

### Closed: Anyone using MCU 8051 IDE??

Could anyone using MCE 8051 IDE please help me with a really easy question??

Why would compiling a C code project result in a "Unable to find "LEDMatrix1.cdb" message?
And no hex or other files...
18. ## Thread: how to define single bit in MCU 8051 ide?

by Aaron2
Replies
5
Views
2,257

### Closed: Re: how to define single bit in MCU 8051 ide?

Have you ever resolved this issue?

Are you still using MCU8051IDE?
19. ## Thread: STC MCUs, Cross-Compiler, STC-ISP programmer suggestions

by Aaron2
Replies
0
Views
1,584

### Closed: STC MCUs, Cross-Compiler, STC-ISP programmer suggestions

My first post mysteriously disappeared, so I will try again...

I'm trying to setup to program STC89C54 MPUs, and have a few rookie questions.

I'm trying to select the best cross-compiler, free...
20. ## Thread: How best to hardware reset or restart a SIM300 (or SIM900)

by Aaron2
Replies
1
Views
1,393

### Closed: How best to hardware reset or restart a SIM300 (or SIM900)

I'm using a manufactured MCU board with a SIM300 module, and need to do a Reset or power cycle of the SIM300.

I need to reset the SIM300 every 10 days. For some reason the SIM300 controller board...
21. ## Thread: WeBee GSM/GPRS Development Board Challange. Ref SIM300 module.

by Aaron2
Replies
3
Views
1,100

### Closed: Re: WeBee GSM/GPRS Development Board Challange. Ref SIM300 module.

Sounds like after buying it, the buyer gets a download code, etc.? The IDE software is included on CD. I suppose a different IDE could be used for the STC 89LE52RC. (instruction and development...
22. ## Thread: WeBee GSM/GPRS Development Board Challange. Ref SIM300 module.

by Aaron2
Replies
3
Views
1,100

### Closed: Re: WeBee GSM/GPRS Development Board Challange. Ref SIM300 module.

Found it!!

But sad news, its all in Chinese, including the software apparently.

Here it is:
http://item.taobao.com/item.htm?spm=a1z10.3.w1017-3470594920.11.49ahIQ&id=35026490940&

I'm trying...
23. ## Thread: gsm sms based security system

by Aaron2
Replies
3
Views
1,458

### Closed: Re: gsm sms based security system

Can you please post the corrected code?
24. ## Thread: WeBee GSM/GPRS Development Board Challange. Ref SIM300 module.

by Aaron2
Replies
3
Views
1,100

### Closed: WeBee GSM/GPRS Development Board Challange. Ref SIM300 module.

I'm trying to identify and locate what appears to be a WeBee GSM/GPRS development board. It has an onboard microcontroller, 16-button pad, LCD port, I/O ports, relay, and misc. other push switches. ...
25. ## Thread: SIM300 module starts searching after 7-10 days, loosing registration?

by Aaron2
Replies
0
Views
668

### Closed: SIM300 module starts searching after 8-10 days, loosing registration?

I'm working with small GSM SMS alarm controller using the SIM300 module.
I have added a small microcontroller with RTC to one panel input, used to trigger a daily test message.

The problem I'm...
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