Hobby Projects - Insulation tester, LED Circuits, Meters.
Showing posts with label Computers-PC-DIY. Show all posts
Showing posts with label Computers-PC-DIY. Show all posts

Wednesday, January 04, 2017

Booting old PC with SD Card

A Need created a concept of no Commercial Value - I was unable to revive my Pentium from the Nineties, the FDD drives have gone bad, those i am able to get from some salvage computer shops are not working. 1.2 and 1.44 both, it may be FDD controller.

SD Card boot for Old Computers

I have all the various boot floppies and software from 1990 onward and have made images also on CDROM.

Data Interface - Virtual Instrumentation, Device Networking.

If there was a SD Card interface for the Plugin Slots and an update for the Award Bios to boot from the SD card, i could get this going.

The HardDisk sizes needed are not available even in the salvage.

The External Pipeline cache also keeps popping out. The heatsink fan gone bad. But the things starts up and you can tweak only the Bios.

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.

Wednesday, September 16, 2015

Raspberry Pi - ARM with Linux Nano Computer

Raspberry Pi is a Miniature Computer that can Interface with a Display Device like TV and a keyboard.

Raspberry Pi a teeny weeny Computer

Model A has been redesigned to have 256Mb RAM, one USB port and no Ethernet (network connection). Model B has 256Mb RAM, 2 USB port and an Ethernet port.

The Raspberry Pi measures 85.60mm x 53.98mm x 17mm, with a little overlap for the SD card and connectors which project over the edges. It weighs 45g.

Raspberry Pi a teeny weeny Computer

The SoC is a Broadcom BCM2835. This contains an ARM1176JZFS, with floating point, running at 700Mhz, and a Videocore 4 GPU. The GPU is capable of BluRay quality playback, using H.264 at 40MBits/s. It has a fast 3D core accessed using the supplied OpenGL ES2.0 and OpenVG libraries.
Overall real world performance is something like a 300MHz Pentium 2, only with much, much swankier graphics.

There is composite and HDMI out on the board, so you can hook it up to an old analogue TV, to a digital TV or to a DVI monitor. No VGA support.

Thursday, March 27, 2014

A Tiny Computer on Arduino Footprint

pcDuino is a high performance, cost effective mini PC platform that runs PC like OS such as Ubuntu Linux. It outputs its screen to HDMI enabled TV or monitor via the built in HDMI interface.

The platform could run full blown PC like OS with easy to use tool chain and compatible with the popular Arduino ecosystem such as Arduino Shields and open source projects etc.  It can also run Android 4.0 ICS.

A Tiny Computer on Arduino Footprint

Early this year, LinkSprite released a powerful mini PC platform that combines the benefit of an ARM based mini PC and Arduino ecosystem: pcDuino, which represents pc + Arduino. pcDuino is pin to pin compatible with Arduino so that existing Arduino shields can be installed on pcDuino with a simple translation board (T-board). By being compatible with Arduino ecosystem, pcDuino is a platform that bridges the power of open software linux and the power of open hardware.

Use Arduino Uno with pcDuino

Use Arduino Uno with pcDuino

pcDuino has all the hardware interface that Arduino Uno has to offer.  Still, there are chances that people run pcDuino just as a mini PC and use Arduino UNO together with it. All the Arduino UNO programming can be done by running Arduino IDE on pcDuino.

Friday, July 05, 2013

The Micro Stop - RS232 microcontroller schematics

"These pages are a useful collection of microcontroller RS-232 data acquisition circuits and code. Most of the code on these pages is written in C because it is the language that is definitely the fastest way to produce working applications."

The Micro Stop - RS232 microcontroller schematics

DVM-001 voltmeter kit

RS232 controlled and RS232 powered DVM-001 voltmeter kit with PC voltage display. This circuit uses a PIC12F675 8-pin microcontroller with built-in analog to digital converter. The circuit also has an op amp and resistor divider network to achieve the 54vdc max input voltage.

RS232 serial tools

This  rs232 data monitor is a thoroughly field tested and reliable software tool for serial monitoring, troubleshooting and logging rs232 communication. A laptop PC and this com port monitor give you a powerful, portable and sturdy tool to aid in designing and logging rs232 data between peripherals and hosts.

RS232 serial tools
 

Thursday, July 19, 2012

Reuse Wireless Keyboard and Mouse

Many people give up on Wireless Keyboard Mouse Combo after a few months of "Novelty". This is due to the chore of replacing batteries and also the cost and wastage (carbon foot).

Then i have long been suggesting, nineties, ferrite smps coupled charger docks. This is like RFID, but more like RF power transfer. One half of Ferrite E-Core is in the Gadget and the other half is in the Dock. When the Gadget is docked it is sensed and power transfer just like in SMPS. Rechargeable batteries in the gadget.

Here is the Schoodle for building this. The Mumbo Jumbo to make a Wired-Wireless Combo

Reuse Wireless Keyboard and Mouse

How-To Convert Wireless to Pseudo-Wired 

Now you got a Wireless Combo, it can be converted into wired yet wireless, it is simple the wires will now carry 3V power to the Keyboard and Mouse, so no batteries. A little gentle and smart drilling is needed for the Mouse.

Get a 5V Adapter, the ones used for charging phones and music players. If you cannot get 5V use a 7805 to derive a 5V from 6 or 9. Use two 1N4007 in series on the positive line to drop 1.5V - test out with a dummy load of 10K and 100uF cap. Now use this to power both the mouse and keyboard with thin dual-core wires leading to the battery terminals. Soldering this may be a delicate job. Now you got a Perpetual Wired Keyboard Mouse Combo. The Interface still remains Wireless.

Another way is use Rechargeable Batteries for both. The wires will carry exactly a regulated 3.3V from a LM317 circuit which can be tweaked. The Mains adapter can be any 6V or 9V raw DC. You can have a Connector for the power wires when you want it to be wire free. This may require greater Gadget Opening and Drilling Expertise.

Reuse - Be Earth Friendly - Keep your Carbon Footprint smaller than that of a Yeti.

Thursday, June 21, 2012

ARTiGO A1100 Barebone Pico-ITX Kit - VIA

A compact sub-liter DIY PC kit for enthusiasts who want to taste the next generation of ultra-compact desktop computing. Full 64-bit computing in an Ultra Compact Desktop form factor. Features like HD video support, HDMI and VGA display connectivity, full Gigabit networking, Wi-Fi Support and five USB ports, all into a PC chassis that fits into the palm of your hand.

ARTiGO A1100 Barebone Pico-ITX Kit- Via

From Hyper Embedded - Microcontroller ASIC and EDA

Features include:

  • VIA Nano 64-bit Processor
  • HD MPEG-2 & H.264 video decoding hardware acceleration
  • Space saving, palm size PC with 14.6 x 9.9 x 5.2cm (5.7″ x 3.9″ x 2″) dimensions
  • Multiple I/Os: HDMI, USB device port, 4 USB2.0 ports, VGA, Gigabit LAN
  • Optional WiFi networking and SD card reader
  • Supports Microsoft Windows 7 & Linux

From - VIA Technologies

Thursday, August 18, 2011

Why Wi-Fi gaining over RJ45

This would be nice on Instructables, The speed of data transfer on a wired connection depends on Cable, Connector and the Crimping.

Ethernet over Coax (EoC) co-axial cable. Optical and Gigabit Ethernet over Optic Fibers. Copper twisted pair and others are other means of Digital Data Transfer over Ethernet.

Wi-Fi and WiMax helps freeing the user from wires.

Building a RJ-45 Ethernet cable of a specific length

RJ-45 connectors and coloured caps; the latter helps to protect the ethernet connector as well as they differentiate the cables in the muddle of cables a network can produce!

Down flat... and in the right ordre to be manipulated; from left to right:

white/orange, orange, white/green, blue, white/blue, green, white/brown, brown

Tuesday, July 13, 2010

Bug Labs - Modular Stackable Embedded Computer

Bug Labs - Modular Stackable Embedded Computer

BUGbase is a fully programmable computer, with a CPU, RAM, rechargeable lithium-ion battery, USB, Ethernet, micro-SD and serial interfaces, and a small LCD with button controls.

Bug Labs - Modular Stackable Embedded Computer

BUGbee is a low-power radio module based on the 802.15.4 protocol, perfect for creating a personal area network (PAN) for machine-to-machine (M2M), home automation and intelligent grid applications.

BUGvonHippel is a breakout module to which you can connect sensors, wires, and USB devices. This module is named after Dr. Eric von Hippel of MIT who wrote the book Democratizing Innovation.

Tuesday, June 15, 2010

Controlling The Real World With Computers

This site uses hands-on experiments to show the basics of how real things in the real world are controlled with computers.

Controlling The Real World With Computers

This site is also for anyone who is the least bit curious about monitoring and controlling such things as motors, lights and switches, or recording and playing everything from sound to the arm position on a robot.

Controlling The Real World With Computers

Experiment 7 - Bi-directional Control Of Motors And The H-Bridge

It would be useful to be able to run a motor in either direction. That's simple with a motor of the type that's been used in the experiments thus far. Reverse the DC power connections on such a motor and its shaft will rotate in the opposite direction. One way to control direction is to use switches arranged in the following manner:

Joe Reeder