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
Interconnection & Timing
Digital Signal Integrity
Digital & Bipolars
Sensors & Detectors
Regulated Power Supply
4 Band Resistor
5 Band resistor
6 Band resistor
Voltage to Pulse Circuits
Current to Voltage Circuits
Frequency to Voltage Circuits
RF Converter Circuits
Sine to Square Wave Circuits
Voltage to Current Circuits
Voltage to Frequency Circuits
Period to Voltage Circuits
VGA to TV converter
Here is the circuit for VGA to scart connection. It is basically a circuit which takes VGA signals and converts it to RGB + composite sync signal which can be fed to TV via SCART connector. VGA card picture components RED, GREEN and BLUE are already at the correct voltage level (0. 7Vpp) and has correct impedance (75 ohm) for direct connection to c
IMPROVED TV COLOR WHEEL CONVERTER
d 101-2 depend on the TV to supply a wide bandwidth video signal. Most black-and-white TVs from 1954 on contain narrowband IF strips or low-pass filters. A wide passband is a disadvantage, because it picks up the chroma signal. In a black-and-white TV, the chroma signal interferes with the monochrome signal. Today, comb filters take care of this p
ISL5929 Dual 14-Bit High Speed D/A Converter
The ISL5929 is a dual 14-bit, 130/210+MSPS (Mega Samples Per Second), CMOS, high speed, low power, D/A (digital to analog) converter, designed specifically for use in high performance communication systems such as base transceiver stations utilizing 2. 5G or 3G cellular protocols.
Correct Board Layout Lowers EMI of Switchmode Converters
Describes how to layout switch-mode DC-DC converter printed circuit boards (PCBs) to minimize switching noise and EMI..
New Power Topology Propels Quarter-Brick Bus Converter to Benchmark Power Density
The ability to reduce power losses is most important Describing here a new ultra-high-performance topology expected to be the foundation for next-generation dc-dc power supplies in high..
Predictive Energy Balancing for Agile Control of Switched-Mode Power Converters
The absence of compensation simplifies development and testing. The number 6 billion turns up often as the number of cell phones in use worldwide. Published estimates average..
The Effects of Turning off a Converter with Self-Driven Synchronous Rectifiers
This type of circuit can never be used in a load-share configuration Synchronous rectification is one of the best ways to improve the efficiency of the low-voltage..
Flash A/D Converter circuit
Mixer Converter Circuits
In 2011, designing a frequency converter circuit consists in most cases of picking out an IC that has the characteristics you need from a gain and mixer spurious product standpoint, add a couple filters, and a power supply. In many cases the oscillator is part of the IC. Of course there are special cases where you have to use a basic mixer and...
The converter IC circuit diagram
TDA8444is the D / A ( digital / analog ) converter IC produced by Philips, and it is used to convert digital signals to analog signals. 1. pin functions and dataTDA8444 IC uses 16-pin double-row package, andpin functions and data are shown in Table 1. 2. Typical application circuitTDA8444 and LM1036Nare matched byCPU to control the tone,
The resonant converter schematic diagram based on step-down circuit (series)
In the generalused switching stabilized voltage supply, it can use theresonantswitch to replace the step-down convertor`s shape, and that is the resonant converter circuit. The diagram shows the example of changing step-down convertor to resonant converter: diagram (a) is current resonant ; diagram (b) is voltage resonant..
2.5KV Isolated RS232-TTL/CMOS Converter/Driver/Receiver
The ADM3251E is a transceiver which has a high speed, 2.5 kV fully isolated, single channel RS-232/V.28. This device is operates from a single 5 V power supply..
LTC1045 TTL RS-232 Converter
A simple way to build a battery-powered RS-232 receiver circuit is shown on the following schematic diagram. This circuit convert RS232 level to TTL level..
Audio Signal Strength Detector/Converter
Below is the schematic diagram of an audio input module. We can produce a DC output voltage that is proportional to the input signal amplitude (the signal..
Low-Cost Logarithmic Converter Using Opamp and Transistor
This low-cost logarithmic converter is built using op-amp and transistor. This circuit uses a Motorola MC1539G op-amp which is connected to PNP transistor. To..
The English Ringing Converter Technical Description
This device can`t be legally hooked up to the PSTN as there is all sorts of red tape you need to go through to get the device registered for that. The basic functional blocks of the English ringing converter are pretty simple. It has a ringing detector, a loop detector, a ringing generator, a power supply, and a microprocessor for control....
Schumann Resonance Converter
Using a similar circuit to the LF block converter, I`ve made a Schumann Resonance Converter that moves the near-DC signals up to around 2 kHz for an ordinary soundcard. Here`s the maiden run plot: It seems to work! The fuzzy lines below 30 Hz are due to the Schumann Resonance. The image is from Spectrum Lab with an offset of 2. 048 kHz (the L. O. f
USB-Atmel External 3.3V Level Converter
In order to programm devices which run at 3. 3V (either SPI-based ones like AVRs or JTAG-based ones like CPLDs), the input and output signal levels need appropriate level conversion (or level shifting) because a 5V input may not see HIGH at 3. 3V and a 3. 3V device may be damaged by a 5V signal. No tristate outputs: If in your design, the...
SR 6m/2m Converter
This kit, designed by Jan G0BBL and implemented and distributed by Tony KB9YIG, is a plug-in board for the Softrock Lite + Xtall RX V9. 0 which down-converts VHF signals in the 2m and 6m bands to HF signals that can be received on the V9. 0 RX. Also documented here is a 4m version (four metres, for our EU friends), courtesy of Bob G8VOI. The...
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...
Digital Signal Integrity
Interconnection and Timing of Digital Circuits
CMOS Circuits Tutorial