Vacuum Tubes Valves
Musical & effects
Yagi Uda Antennas
Metal Detector Circuits
Liquid Sensing Circuits
Light Sensing Circuits
Voltage Detector Circuits
Air-Gas Detection Circuits
Human Sensing Circuits
RF & Radiation
Optical Sensing Circuits
Free Energy Circuits
AC to DC & DC to DC
Solar Cell Circuits
Micro Power Circuits
Switching Power Supplies
Light Laser LED
Digital to Analog
Analog to Digital
Data Bus Circuits
Voltage to Pulse
Current to Voltage
Frequency to Voltage
RF Converter Circuits
Sine to Square Wave
Voltage to Current
voltage to frequency
Period to Voltage
Video Wall circuits
TV Video Circuits
Motor Control Circuits
8051 / 8052
PCB CAD Software
Car bike Circuits
555 Timer Circuits
Remote Control Toy
H Bridge Circuit
DIY HV Variable Cap
DIY PMA alternator
Interconnection & Timing
Digital Signal Integrity
Digital & Bipolars
Sensors & Detectors
Regulated Power Supply
4 Band Resistor
5 Band resistor
6 Band resistor
USB Interface Circuits
USB Interface Circuits
usb car charger
This is a project of a mini USB car charger circuit. The circuit is very simple to build using only three components. Heart of the circuit is a LM78M05 IC which is a 5V positive voltage regulator IC. This IC has many built in featuers like thermal overload protection, short circuit protection, safe operating area protection etc. The circuit can b
Portable battery powered USB charger circuit or schematic using IC LM7805. The circuit require only few components. ..
avr project i2c tiny usb
The i2c-tiny-usb project is an open source/open hardware project. The goal of i2c-tiny-usb is to provide a cheap generic i2c interface to be attached to the..
Fast Portable USB Charger
Powered by LM2700 IC, this charger can help you to re-charge your mp3 player, camera, cell phone, and any other gadget you can plug into a USB port with faster rate..
USB LED Lamp Circuit using 5 Volts
A simple usb LED lamp circuit using 5 volts power supply from usb port, which can be used to light a desktop or laptop computer during power failure..
USB sound card
Designing and building a USB sound card is no longer a head ache because we have got the PCM 2702 integrated circuit from Texas Instruments. The PCM2702 is an integrated 16 bit digital to analog converter that has two digital to analog output channels. The integrated interface controller of PCM2702 is compliant to the USB 1. 0 standards. The IC can
USB 8051 (89 series) & AVR Microcontroller Programmer
Two-Channel PC Based Oscilloscope USB
Since portable PCs are today common and a USB linkis a better solution here we present an oscilloscope using USB port of the PC that operates at upto 10 kHz with ±16V input voltage. Ithas much more improved features thanthe PC-based oscilloscope.The oscilloscopeuses IC PIC18F2550 from Microchipas the main controller, which makesthe oscilloscope
2.75 W High Eficiency Usb Charger
Boost Converter With Usb Power Switch
The Allegro ACS75x family of Current Sensors provides economical and precise solutions for current sensing in industrial, automotive, commercial, and Communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, power supplies, and overcurrent f
Minimum Component Ft232rl Usb To Rs232 Converter Cable
The ML7005 is a multi-functional DTMF transceiver LSI with built-in a DTMF signal generator, a DTMF signal receiver, a call progress Tone generator, a call progress Tone detector, and a FAX (FX) signal detector. Each functional block CAN be controlled by an external MCU via a 4-bit processor Interface The ML7005 does not contains a modem. However,
Ub232r Usb Mini-b Ft232r Evaluation Module
The UDA1343TT is a single-chip stereo Analog-to-digital Converter (ADC) and digital-to-analog Converter (DAC) with basic signal processing features employing bitstream conversion techniques. The low power consumption, the small package size and low voltage requirements make the device eminently suitable for use in low-voltage low-power portable di
Usb To Rs232 Uart Serial Converter Pcb
The USB-RS422-PCB is a USB to RS422 level serial UART converter PCB incorporating FTDI`s FT232RQ USB to Serial UART Interface IC device which handles all the USB signalling and protocols. The PCB provides a fast, simple way to connect devices with a RS422 Interface to USB Each USB RS422, PCB contains a small internal electronic circuit board, utili
Usb To Rs422 Uart Serial Converter Pcb
USB to SPDIF Converter
Does anyone know where I can get a schematic for a USB to SPDIF converter, like the ones from empirical audio. Thanks!!! I like their concept but $500 ..
Make a USB color changing light
This color changer mixes light from high-power LEDs to create more than 16 million colors. A smooth auto-fader cycles the colors, or you can hook it up to a USB port and control it from your computer. This color changer borrows a well-known color model used in TVs and LCD panels. These displays blend red, green, and blue light to create a vast num
PIC18F4550 Communication with PC using USB
PIC18F4550 Communication with PC using USB HID Class, Visual Basic Communication xpress_embedo..
USB PICKit2 programmer
schematic of board with PIC16F84 and also other PICs which can be connected to this USB PICKit2 programmer If someone has such please show me, i`d appreciate it, thanks. another question is i heard that if i experiment with oscillator ffrequency on my demo board with F917 chip (it has internal oscillator) my USB of programmer
Cortex M3 MCU features USB firmware protection
Atmel joins NXP, ST, Luminary Micro (now TI), and Toshiba as a microcontroller vendor to use the ARM Cortex-M3processor core. As a presumed replacement for some of their ARM 7 based MCU products, Atmel`s first Cortex-M3aims to differentiate from the rest by offering high speed USB functionality, firmware protection, differential input ADC, and 1. 6
Open source USB scope
There are plans to make it 1Gsps in the future, using interleaved ADCs and staggered clock, but that`s beyond me at the moment, so the first iteration will only have 100Msps (fastest from single ADC). The part I`m most unsure about is the analog front end, as we haven`t done any high speed circuit design in classes yet, so most of my knowledge com
Low-Power Car/Bike USB Charger
Looking for an efficient USB charger that can operate from a 12V car battery? This unit functions at up to 89% efficiency and can charge USB devices at cu..
Power Supply For USB Devices
More and more equipment is sold that runs off internal rechargeable batteries. Although a matching charger is usually supplied in the package, there are a..
The Itsy-Bitsy USB Lamp
It plugs into the USB port and is just the shot for checking motherboard switch and jumper settings. Many readers will remember a commercial product of a..
Life in the 21st century would be almost unbearable without some of the computer peripherals that PC users now look on as essentials take for example th..
USB Operated Home Appliances
When turning a computer on and off, various peripherals (such as printers, screen, scanner, etc.) often have to be turned on and off as well. By using the..
USB Power Injector For External Hard Drives
A portable USB hard drive is a great way to back up data but what if your USB ports are unable to supply enough juice to power the drive A modified version of the Silicon Chip Usb Power Injector is the answer. For some time now, the author has used a portable USB hard drive to back up data at work. As with most such drives, it is powered direc
USB Powered Audio Power Amplifier
This circuit of multimedia speakers for PCs has single-chip-based design, low-voltage power supply, compatibility with USB power, easy heat-sinking, low c..
USB Powered Mobile Phone Battery Charger
This simple circuit can give regulated 4. 7 volts for charging a mobile phone. USB outlet can give 5 volts DC at 100mA current which is sufficient for the slow charging of mobile phones. Most of the Mobile Phone batteries are rated 3. 6 volts at 1000 to 1300 mAh. These battery packs have 3 NiMh or Lithium cells having 1. 2 volt rating. Usually...
USB Switch For Printers
This circuit switches a printer s USB connection from a PC to a laptop. What was needed was a method of allowing a laptop to use the printer occasionally..
Universal Serial Bus USB pinout
ISL6185 USB power controller circuit design
Using the ISL6185 USB power controller family can be designed a very simple USB power supply electronic project that provides fully independent overcurrent (OC) fault protection for two or more USB ports. This product family consists of sixteen individual functional product variants and three package options and is operation rated for a nominal +2
USB to Serial RS232 adapter circuit design electronic project
This USB to Serial RS232 adapter is very useful in many situations we need to connect a device with RS232 to a computer without RS232 port, but with USB port. Using FT232BM chip manufactured by Future Technology Devices International we can make a very simple USB to Serial RS232 adapter using few external components. FT232 driver main features
Computer Interface Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
DIY HV Variable Capacitor
DIY PMA Alternator Plans
Digital Signal Integrity