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
Light Laser LED Circuits
Using C-MOS light emitting diode drive circuit NAND gate pulse
4000 Series 4011B is (NAND gate) by the 4AI NAND gate circuit group to form two loops unstable multivibrator. L NAND gate and NAND gate 2 is ikHz (determined in accordance with
MIC2298 LED driver circuit diagram
Merry Company (Micrellnc) introduced the industry's smallest and most powerful of the most used in portable electronic devices each LED driver MIC2298.
MA1576Y charge pump LED driver circuit diagram
Using MAX1576Y charge pump white LED driver circuit as shown, the circuit is capable of driving up to 480mA total current two groups (n = 4 white LED) white LED.
Changes inductive boost LED Driver
White LED can be used in series or parallel connection, both solutions have advantages and disadvantages. The disadvantage is that parallel the LED current and brightness do not automatically match.
Based on the LT3755 50W white LED headlight drive circuit diagram
LT3755 in the LED string high side sensing output current, high-side current sensing is used to drive the LED's most flexible program, PWM input provides up to 3000: 1 dimming ratio,
LED fast optical pulse generating circuit diagram
Due to the lack of speed in the entire series TTL monostable multivibrator, and because of the requirements of ECL voltage swing wide range of small and power, which drives us to use F series circuit having a fast transition
LinkSwitch-PL Series LED driver circuit
Powerint's DER322 reference design uses LinkSwitch-PL family LNK460VG devices, the industry's first alternative 100W A19 incandescent LED driver using a single-layer PCB, a low-cost low component count and small size characteristics, efficiency of greater than
LTC3202 drive white LED circuit diagram
LTC3202 is Linear TECHNOLOGY company does not need a charge pump gated oscillator Pictured LTC3202 charge pump using a lithium-ion battery-powered white LED driver circuit.
LED indication Integrated Circuits
LB140 is shown in Figure Five-digit LED level indicator typical driver IC circuit, BL1405 widely used tape recorders and tape recorders do with level indication.
I2C control interface includes RGB LED Driver circuit
Have you ever in the dark watching time from the mobile phone In this case the bright and dark backlit strong contrast will make the eyes uncomfortable, which requires the use of "ICON" model "that is in standby mode with a slight current time,
CP2128 white LED driver circuit
CP2128 is a low noise, fixed frequency step-up garden DC / DC converter, in the case where the input voltage range of 2.7 ~ 4.5V, the device can generate an output voltage of 5V to eat, the maximum output current up to 100MA. C CP2128 few external
A passive light emitting diode output level indication circuit
A passive light emitting diode output level indication circuit
LED strip meter circuit diagram of a point
A simple level power meter to provide high-fidelity sound system bar or dot matrix display. Green LED display 0-7; 8 show yellow, red 9, the LED displays peak power. This circu
Comes with rechargeable lead-acid battery LED emergency light circuit diagram
According to kind of draw the circuit diagram shown in Figure 5, 220V AC power after the capacitor buck diode rectifier to lead-acid battery charging, the red LED for charging
Free homemade LED lamp circuit diagram
Also known as the Free lamp (ie, online sellers, commonly known as Myanmar lamp), because it takes into ordinary household fixed telephone line voltage power to do, no batterie
Automotive LED driver circuit diagram LT3486
As shown in the automotive LED driver circuit diagram LT3486 constituted. LED used in the cars central brake light (CHMSL) when there is an advantage: faster reach the set brig
LED signal amplifying circuit diagram
As shown in the circuit diagram for the LED signal amplification:
LED lights inside the refrigerator circuit diagram
As shown in the refrigerator for the LED lighting circuit schematic. The circuit is composed of eight LED lights white LED high-brightness light-emitting tube. LED are mounted
LED level meter driver IC Fig.
As shown is BA6104 Five-digit LED level meter driver IC basic application circuit if the level is higher than required to display 1V, only 7 feet in the power supply Vcc indire
AC LED drive circuit
As shown, still work in the case of unknown polarity of the voltage or the power supply polarity is reversed. And DC Drives as AC drives, the current limiting resistor R whose
BA6104 Five-digit LED level meter driver IC Basic Application Circuit
BA6104 Five-digit LED level meter driver IC basic application circuit BA6104 Since the input stage that uses a PNP transistor base composite input, so the input impedance is hi
CAT3606 LED driver application circuit
CAT3606 is a high efficiency white LED drivers, this adjustable charge pump is suitable for general-purpose, large-panel, flicker-free white LED backlight and dual-display syst
220V AC powered LED lamp drive circuit diagram
Circuits, C1, R1, varistors, L1, R2 filter circuit composed of a primary power supply, can filter out transient overvoltage input, C2, R2 down circuit composed, C3, C4, L2, and
A 16x16 LED Matrix
In the early `80s, I read some articles on LED arrays. They described using arrays of 64 or more LEDs as crude oscilloscopes and other interesting things. I decided I`d make one myself - a really big array, 256 LEDs arranged as 16 columns by 16 rows. In 1983, while I was in my final semester of electronics classes at Monterey Peninsula College,...
13 Color LED Rainbow
This circuit uses a set of 13 differently colored LEDs to generate a full color spectrum. The photo does not fully represent the colors generated due to camera limitations. The real-world display is very eye-catching. If you want to "trick out" your PC, this circuit is for you. Forget about those boring blue PC light displays.
3V LED Chaser
There are many 9V chaser circuits that seem to waste about 7V when driving LEDs that are only about 2V. This project is unique, because it uses only two inexpensive alkaline battery cells totaling 3V for power. Since most of the waste is eliminated, the cells last a long time. Unlike the other circuits, this one flashes the LEDs for only about...
LED Ultraviolet exposure box
The LEDs are OSSV53E1A from OptoSupply and they have an 140° angle. This means that the first plane with uniform density can be obtained at a shorter distance from the LED, for a given spacing between LEDs which means smaller height for the board. Their peak wavelength is 405nm, which is higher than recommended by the boards' manufacturer....
THREE-COLOUR DISPLAY USING BICOLOUR LEDs
The circuit presented here uses bicolour LEDs to generate a display in three colours, namely, red, green, and yellowish green. Transistors T1 through T20 form a grid to which common-cathode bicolour LEDs (LED1 through LED10) are connected. Transistors T1 through T10 have their collector terminals connected to the emitter of transistor T21....
8 Random Flashing Leds Circuit
This project flashes eight LEDs in an apparently random manner. It uses a 4060 combined counter and display driver IC which is designed for driving 7-segment LED displays. The sequence is not really random because seven of the LEDs would normally be the display segments, the eighth LED is driven by an output that is normally used for driving...
LED Blinker with HT-2014M
A very simple LED flasher circuit. With HT-2014L the circuit produces 1 flash per second and the HT-2014M produces 2 flashes per second.
1.5V battery powers white-LED driver
Although white LEDs are common in a variety of lighting applications, their 3 to 4V forward-voltage drop makes low-voltage applications challenging. Charge pumps and other ICs are available for driving white LEDs, but they generally don`t work with the low supply voltage of 1.5V in single-cell-battery applications. The low-voltage circuit of...
6V Ultra-Bright LED Chaser
This is a spectacular but completely useless project. It lights Ultra-Bright LEDs in a sequence and each LED flashes brightly very briefly. The LEDs light-up going around and around since they are mounted in a circle (on a CD), then they pause before chasing again. The very brief flash of each LED (15ms) and the pauses (1 second) reduce the...
Light Sensing Circuits
Light Dimmer 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