If you’re like me, you may or may not have secret files plotting world domination and other devious deeds. These files obviously need to be hidden from the prying eyes of sisters, FBI agents, grandparents, etc. We are going to convert a phone jack in the wall into a secret USB memory device.
Source: stonehenge360
This simple device allows you to check the correct working of the USB ports of any computer, using a green led and message from your operative system.It will allow you to test the proper assembly of any port without risking any expensive device.If you normally work fixing computers this is a must in your tool [...]
eMail Light project is to indicate the presence of emails that are currently on my email server with a flashing LED. I am often not right at my desk and I would like to know if I have email. Or I am near my desk, but my screen saver has kicked in while I’m working [...]
The software is based on the HID demo from Microchip and has been adapted to interface the sensor instead of using a fixed mouse movement. The sensor itself is interfaced using the SPI protocol (see the sensor’s datasheet – ADNS 2610 Optical Mouse Sensor).
Source: steffenschuette
This project is a full color LED-controller that can be configured via a USB connection. The color of the connected LEDs (common anode only) depends on the selected operating mode:Slow color change (ca. 40 minutes),Fast color change (ca. 2 minutes),Temperature base color (temperature range adjustable),Constant color 1,Constant color 2.Constant color 3 and Constant color 4.
In [...]
USB – RS232 converter, uses only Tx and Rx lines, with selectable 2400, 9600, or 38400bps. PCB projected to fit in old mobilephone cable, most of parts is surface-mounted.
Source: diy.elektroda.eu Download Project: Converter USB – RS232
This device is fully functional sound card for PC. The main advantage of using PCM2704 against PCM2702 is much easier construction. The circuit can be powered directly from USB port.
Source: diy4fun
This is a simple project, but one I hope you will find useful. Recent upgrades of 2 of my PC’s with bang-up-to-date motherboards, have demonstrated a need for USB ‘A’ socket headers, either to fit on a standard PC Component plate, or a spare blanking panel on the front of the PC. I’ve tried sourcing [...]
Miniature usb capslocker, this is exactly the same as original project, i have made even smaller board. Dimensions are: 2.5mm x 11mm x 12mm, used pcb can not be thicker than 0.75mm, else it wont fit into USB.
Source:diy.elektroda.eu/
This submini USB scope is based on a Atmel Tiny45 cpu and cost less than 5€ with a homemade pcb.
It has 2 analog inputs and can supply 5V ont the 4 pins header on the right. One of the inputs can be scaled down with the trim pot.
The firmware in the Tiny45 is written [...]
Introduction
I need for my high quality DAC convertor from USB to S/PDIF. I choose PCM2704 circuit, which sent me TI company like sample. Circuit has analog output for headphones and digital S/PDIF output with electrical and optical(TOSLINK) interface. We can use too 3 HID buttons for setting volume and mute.
Circuit description
Schematics is almost identical to [...]
This project allows instant start sequentially but a dozen low-voltage lamps 12 V / 60 W, and makes them fade and always sequentially (but slower). This system has been designed to meet the demand of a visitor who wanted ten recessed low voltage spot in a driveway to his house, with the following function: – [...]
This circuit allows switching on a LED when the battery voltage (12V) drops below a certain threshold. The operating system is based on a comparison of tension, which comes in a zener diode. If the supply voltage is 12V and the zener diode is a 10V model (this is the case in the diagram), we [...]
This is a good looking and practical device that can be useful in many areas where countdown timer is needed. This project is based on the PIC16F84A microcontroller. The time range can be adjusted between 1 and 999 seconds. This project has 3 buttons and one of them is named Set Button. In order to [...]
A VU meter is often included in audio equipment to display a signal level in Volume Units; the device is sometimes also called volume indicator (VI). In this project we are building a basic and low cost LED VU Metre circuit . The extent (range) display is -18 dBu to +3 dBu, spread over [...]
Today we have a new category “Projects” and a new electronic project 12 Channel LED Chaser with PIC16F84A.
This project is based on the popular PIC16f84A micro-controller.The heart of this project LED chaser is the PIC16F84A PIC microcontroller.A 4MHz crystal and capacitors C1 and C2 22pf is used for providing clock pulses to the micro-controller. The [...]
