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
Double tube fluorescent lighting circuit
Double tube fluorescent lighting circuit is shown. In some cases the need to improve twice, single-tube light can not meet the lighting requirements, double tube lighting. Phys
Fluorescent energy-saving electronic ballast circuit
Electronic ballasts have a wide operating voltage range, fast start working no noise, no flicker, save energy and so on. It has been more and more people to accept. The circuit
Neon tube flasher
The voltage required to ignite the neon tube is obtained by using an ordinary filament transformer (240-6 V) in reverse. Battery drain is quite low, around 1 to 2 milliamps for a nine volt battery. The pulses from Ql, unijunction transistor, operated as a relaxation oscillator and are applied to Q2 which in turn drives Q3 into saturation. The...
This circuit has been designed to drive an 8-W fluorescent lamp from a 12-V source using an inexpensive inverter based on the ZTX652 transistor. The inverter will operate from supplies in the range of 10 to 16.5 V, thus making it suitable for use in on-charge systems such as caravanettes as well as periodically charged systems, such as...
Battery-powered fluorescent lamp circuit 1
285 is indiscriminately using a battery-powered fluorescent lamp circuit, towns during a power outage use it as a temporary emergency according to the invention. Transistor V 7
DC fluorescent light circuit
For the use of direct current 6 ~ 8W fluorescent lamp ignition circuit ring. It is a common emitted by a pole blocking
Incandescent switching circuit
Incandescent is a two-wire connection Life Extension open curse, i A warm-up time than its H K, so scorpionfish life bubble E is quite pregnant. After closing the Ji Guan S, 220V AC only negative 3F week by VD1,
Fluorescent lamp electronic ballast circuit
One (1) Electronic Ballast circuit circuit shown in Figure 2-11. This circuit uses special fluorescent lamp starter thyristor SCR Y1112, ordinary thyristor phase than having to maintain a higher
40W fluorescent lamp electronic ballast circuit
The figure shows that input from the varistor overvoltage protection role. VDi - VD4 rectifier, L1, C2, q filtering. R, c9 and VD6 composition oscillation starting circuit, the transformer T and H, V and other components transformer coupling high-frequency
Five pairs of fluorescent tubes emergency circuits
786A multi-functional double-tube fluorescent emergency circuit shown in Figure 2-129. This circuit is similar to Figure 2-125.
Double tube fluorescent emergency circuit 2
As a Nissan Panasonic rechargeable emergency fluorescent lamp circuit. Built-in 6V, 4A. h high-energy batteries can be directly charged. It allows the two 6W fluorescent lamps.
Lighting inverter circuit principle 6 ~ 12W fluorescent lamps
As shown for the lighting inverter circuit principle 6 ~ 12W fluorescent lamps. After mains buck, rectifier, filter charging the battery. When switched inverter operation, gene
Lighting inverter circuit principle 6 ~ 8W fluorescent
As shown for the lighting inverter circuit principle 6 ~ 8W fluorescent. The circuit is suitable for lighting 6 ~ W fluorescent tube circuit parameters are marked in the figure
Cheap fluorescent display circuit 555
As shown in FIG economic fluorescent display circuit. The core of the circuit is the multivibrator 555 and R1, R2, C1 and other components of the oscillation frequency is f 1.4
Fluorescent light circuits at low temperature and pressure
By adding a second pull tube in the circuit, when the starter ionization. In the positive half cycle diode conduction, from the whole flow effect, the current in the circuit is
Ballast Control IC Design
The IRPLLNR2 is a high efficiency, high power factor, fixed output electronic ballast designed for driving rapid start fluorescent lamp types. The design contains an EMI filter, active power factor correction and a ballast control circuit using the IR21571. This demo board is intended to ease the evaluation of the IR21571 Ballast Control IC,...
25W 230VAC small size ballast using IR2520D
The circuit is built around the IR2520D Ballast Control IC. The IR2520D provides adjustable preheat time, adjustable run frequency to set the lamp power, high starting frequency for soft start and to avoid lamp flash, fault protection for open filament condition and failure to strike, low AC line protection and auto-restart after line...
This circuit is a simple ultraviolate light that can be powered by a 6 volt battery or power supply (such as the power supply on the "Circuits" page) that is capable of supplying 1 or more amps.
A ballast that is dimmed from a (phase cut) dimmer
Virtually all domestic and professional dimming systems are based on triacs. These devices will conduct once they have been fired, only while current flows in excess of the holding current of the device. These dimmers work very well with a resistive load such as an ordinary Tungsten filament light bulb as the triac can be fired at any point...
Digitally DALI Dimming Ballast
A complete digital dimming system includes the dimming ballasts and a digital control unit for converting information from an Ethernet connection to the communication protocol required by the micro-controller in each ballast (Figure 1). Applications for this system include building management or studio lighting where it is desired to...
Electronic Ballasts Using the IR215X Drivers
In this circuit the switches are power MOSFETs driven to conduct alternately by windings on a current transformer. The primary of this transformer is driven by the current in the lamp circuit and operates at the resonant frequency of L-C. Unfortunately, the circuit is not self starting and must be pulsed by the DIAC connected to the gate of...
The IRPLLNR1 is a high efficiency, high power factor, non-dimmable electronic ballast designed for linear fluorescent lamp types. The design contains an active power factor correction circuit for universal voltage input and a ballast control circuit using the IR2153 for controlling the lamp. Other features include EMI filtering, transient...
CFL Ballast for 26W 220VAC
The IRPLCFL5E reference design is an electronic ballast for driving 26W compact fluorescent lamps from 220VAC. The circuit provides all of the necessary functions for preheat, ignition and onstate operation of the lamp and also includes the EMI filter and the rectification stage. The circuit is built around the IR2520D Ballast Control IC.
Digital DALI Ballast for 32W/T8 110V
This reference design is a high efficiency, high power factor, digital dimming electronic ballast designed to drive rapid start fluorescent lamp types. The design contains an active power factor correction circuit for universal voltage input as well as a ballast control circuit using the IR21592. The design also includes a PIC16F628...
Digital DALI Ballast for 36W/T8 220V
The Digital Addressable Lighting Interface (DALI), international standard prlEC929, is a communication protocol and method to interface lighting units on a 2-wire network. The DALI protocol is 16 bits and supports addressing up to 64 ballasts individually, 16 groups or broadcasting to the entire lighting network. Aside from the protocol, DALI...
42 Watt Compact Fluorescent Ballast
The CFL-2 is an electronic ballast design for driving a 42 watt compact fluorescent lamp from a 120 or 230 volt AC line. The circuit was designed using the IR2156 Ballast Driver IC. The main features of the circuit are programmable frequency, preheat time, over-current threshold and dead time. A circuit board was designed and tested to...
low voltage DC Inverters for fluorescent lamps
This is a collection of non-intelligent (at least for now) inverter circuits for operating fluorescent or other similar devices from low voltage DC power sources. These designs - mostly obtained by reverse engineering commercial camping lanterns, power inverters, and the like - are all very basic circuits which use simple oscillators, easy...
12VDC Fluorescent Lamp Driver
A number of people have been unable to find the transformer needed for the Black Light project, so I looked around to see if I could find a fluorescent lamp driver that does not require any special components. I finally found one in Electronics Now. Here it is. It uses a normal 120 to 6V stepdown transformer in reverse to step 12V to about 350V...
BALLAST CONTROL IC
The IR2156 incorporates a high voltage half-bridge gate driver with a programmable oscillator and state diagram to form a complete ballast control IC. The IR2156 features include programmable preheat and run frequencies, programmable preheat time, programmable dead-time, and programmable over-current protection. Comprehensive protection...
40W Fluorescent Lamp Inverter
This 40W fluorescent lamp inverter allows you to run 40W fluorescent tubes from any 12V source capable of delivering 3A. This is basically a larger version of the 12VDC Fluorescent Lamp Driver and can be used to light regular or blacklight tubes.
Preheat starter for electronic ballast
The design usually involves a compromise between turn-on voltage and lamp life because the two are inversely related. One way to reach a reasonable compromise is to initially allow a momentary inrush current to warm the filaments, followed by a series of interrupted short circuits across the lamp that generate the required high voltage to...
Linear Fluorescent Ballast with IR2166
The IR2166 Demo Board is a high efficiency, high power factor, fixed output electronic ballast designed for driving rapid start fluorescent lamp types. The design contains an EMI filter, active power factor correction and a ballast control circuit using the IR2166. This demo board is intended to ease the evaluation of the IR2166 Ballast...
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