[common cathode or anode]

Hello,

please help me to distinguish is this common cathode or common anode connection 4 digits, 7 segment display?
Schematics in attachment..

Thanks  ;)

[PIC16F877A learning board]

Or should I ask what is R1 on my schematic? Resettable fuse?

schematic in attachment..

Thanks

[PIC16F877A learning board]

I see power supply connector & USB are in that circuit..

[PIC16F877A learning board]

I am soldering parts on my PIC16F877A learning board. But I have insufficient info about R1 component on upper left corner.. Can you help me figure out what kind of resistor is that?

Schematic and PCB on photos:

http://imageshack.us/photo/my-images/823/45106697.jpg/
http://imageshack.us/photo/my-images/825/46087841.jpg/
http://imageshack.us/photo/my-images/189/79845887.jpg/

Thanks ;)

[LCD 16x2 + PIC 16f628a (4bit mode)]

ooops my mistake.. my LCD is 2x20 characters..

maybe code needs to be modified? maybe this LCD has different initialization routine than 2x16 LCD code is written for?

Thanks

[LCD 16x2 + PIC 16f628a (4bit mode)]

Hello,

I connected everything like on shematics. I made hex file after succesfull build in mikroC and burned it on pic16f628a... but all I get is black boxes in first row of my lcd.
Can you tell me where am i going wrong. I have LCD with side connections like one in attachment..

*/
// LCD module connections
sbit LCD_RS at RB4_bit;
sbit LCD_EN at RB5_bit;
sbit LCD_D4 at RB0_bit;
sbit LCD_D5 at RB1_bit;
sbit LCD_D6 at RB2_bit;
sbit LCD_D7 at RB3_bit;
sbit LCD_RS_Direction at TRISB4_bit;
sbit LCD_EN_Direction at TRISB5_bit;
sbit LCD_D4_Direction at TRISB0_bit;
sbit LCD_D5_Direction at TRISB1_bit;
sbit LCD_D6_Direction at TRISB2_bit;
sbit LCD_D7_Direction at TRISB3_bit;
// End LCD module connections

// Define Messages
char text1[] = "Testing LCD";
char text2[] = "using PIC16F628A";
char text3[] = "Test successful";
char text4[] = "in 4-bit mode";

void main() {
  Lcd_Init();                        // Initialize LCD
  do {
      Lcd_Cmd(_LCD_CLEAR);          // Clear display
      Lcd_Cmd(_LCD_CURSOR_OFF);      // Cursor off
      Lcd_Out(1,3,text1);            // Write message1 in 1st row
      Lcd_Out(2,1,text2);            // Write message1 in 2nd row
      Delay_ms(3000);                // delay 3s
      Lcd_Cmd(_LCD_CLEAR);          // Clear display
      Delay_ms(1000);                // delay 1s
      Lcd_Out(1,2,text3);            // Write message3 in 1st row
      Lcd_Out(2,3,text4);
      Delay_ms(3000);                // delay 3s
      } while(1);
}

[Power supply]

Let's say I would like to make PSU like this one:
http://www.electronics-lab.com/projects/power/001/index.html

but with lower voltage considering my transformer.

Thanks!

[Power supply]

Hello,

I would like to build laboratory power supply, but I am not having much sucess in finding suitable transformer for one that is described in Electronics Lab projects.
Is this transformer suitable for such a use (lab power supply)?
60VA European type (input: 230V AC 50Hz):
Standard: EN61558, EN60065, EN60555
Case size: 101 x 63 x 74mm
Weight: 1090g
Model number: DE-60-12W: O/P: 12V AC, 5.00A, 60A

It looks like one in attached picture..

Thanks a lot ;)