Hobby Projects - Insulation tester, LED Circuits, Meters.

Wednesday, November 11, 2015

Up Down BCD counter Tutor

See a Tutor Digital up down BCD counter that will help you take the first step in digital electronics.

Counter Lab - The Counter can be tested by clicking the buttons given below, Watch the LEDs and seven segment display. Inc, Dec, and Set buttons are momentary acting and Clk Button is latching  type. The Dip Switch  in the Left also can be set by clicking on each of them, watch the switch and LEDs after a click.

Preset Digital BCD Counter

a. Set the DIP Switch as you like and then Press the Set button.  Now you will see the BCD value in the yellow LEDs named 4029 output. The Decimal value will be seen in the seven segment Display. Now try for different dip switch settings and see the BCD LEDs and Decimal output.

b. Now Press The Inc and Dec pushbuttons and See the corresponding green LEDs which indicate the state of the Nand gate 4093 Flip Flop. Set it to Increment up-count or Decrement which is down-count.

c. Now Click the Clk - clock or count button, the switch will latch, press it again to release.  If you toggle  it once the counter will get a single pulse and it will count it, see the BCD and decimal displays. Now  you turn it on and leave it,  the counter will keep counting one per second till you turn it off, the clock nand gate is wired to be an oscillator.

Friday, November 06, 2015

PIC Microcontroller Tutorials

These are Tiny Chips that integrate the Microprocessor and Peripheral chips in a compact size with low power consumption. PIC Microcontrollers from Microchip are the evolved computing digital devices that go into many gadgets and intelligent equipment. These are easy to program and reprogram and even protect your code or IP.

PIC Microcontroller Tutorials
The PIC has the math power. The memory, the I/O ports are integrated in the chip like 8051. Some may remember that Microprocessors like 8085 and Z80 had all these functions in chips outside and used to consume more power. Then came CMOS and better IC technology. The 8051(now avr, atmega)and PIC Micro are entire boards in one chip.

PIC microcontrollers for beginners too - Author: Nebojsa Matic

The above tutorial gives the History of computers, microprocessors and the details of PIC Micro's Internals.

"..what microcontrollers are and how they operate. Numerous illustrations and practical examples along with a detailed description of the PIC16F887 microcontroller will make you enjoy your work with PIC MCUs."

PIC Microcontrollers - Author: Milan Verle

PIC Tutorials and Gooligum baseline and mid-range PIC training and development board.

PIC Training Course
Gooligum PIC training board

Introduction to PIC Microcontrollers,Baseline PIC Architecture and Assembly Language, Baseline PIC C Programming, Mid-range PIC Architecture and Assembly Language - Quite a few are free and can be read online.

Starting with PICmicro controllers by Wouter van Ooijen. PICmicro is the brand name for a family of microcontrollers manufactured by Microchip. The PIC acronym stood for Peripheral Interface Controller, but recently Microchip has renamed their chips to PICmicro. Within this family the flash-microcontrollers (16×84, 16f62x, 16f87x) are ideal devices for hobbyists and low-volume professionals.

Learn to program in C with FED - This manual will take you through the process of learning C from variables through constants to pointers and then structures and unions. Most of the examples are standalone and are as small as possible to enable the purpose and effect to be easily understood.

Programming and Customizing PICmicro - Myke Predko

Monday, November 02, 2015

The DIY USB Sound Module

I got this and it solved my audio problem in Linux computer. I had the classic "Dummy Output" Problem with the Onboard Audio section not being detected.

I ran all the alsa and pulseaudio rituals. I got some luck, after updates audio was gone again. This device solves the problem. I suggest all linux users who have the "Dummy Audio Syndrome" to just use this device called USB Sound Card or USB Sound Adapter.

In the 386 days, it was a "SoundBlaster Card" for Music and Mic. Monitors had the "Trident SVGA card" both  PC-Cards not integrated on Motherboard to get Audio and Video going. Now all things are onboard. In the future all things on one Silicon Chip or maybe One Graphene Slice. It will be called "The Tortilla"

Make your own DIY USB Sound Card

Make your own DIY USB Sound Card

Miroslav BatÄ›k from Prague in Czech Republic has made many neat diy projects and posted them with full details in his blog Diy4Fun

Make a Sound Card with PCM2704 an IC from Texas Instruments.

This device is fully functional sound card for PC. The main advantage of using PCM2704 against PCM2702 is much easier construction. As you can see on the block diagram it has built-in 5V and 3.3 voltage regulator, HID interface (MUTE, VOL+, VOL-), S/PDIF output.