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
Battery-Operated Black Light Circuit
The battery-operated black light uses a U-shaped, unfiltered, black-light tube, which requires approximately 250 Vac to operate. To create the 250-Vac 6-V battery, the circuit uses a one-transis-tor blocking oscillator that drives a ferrite inverter transformer. A blocking oscillator turns itself off after one or more cycles. In this circuit,...
Low voltage lamp flasher
The circuit is composed of a relaxation oscillator formed by Q1 and an SCR flip-flop formed by Q2 and Q3. With the supply voltage applied to the circuit, the timing capacitor CI charges to the firing point of the PUT, 2 volts plus a diode drop. The output of the PUT is coupled through two 0.02 ^F capacitors to the gate of Q2 and Q3. To clarify...
Electronic light flasher
The blinking or flashing rate is determined by Ul, a 555 timer integrated circuit. Its output, at pin 3, feeds U2, a HI1J triac driver. That driver consists of an infrared LED that is coupled internally to a light-activated silicon bilateral switch (DIAC). When the LED internal to U2 is turned on by the timer, Ul, its light triggers the DIAC;...
Low current consumption lamp flasher
The circuit is economical in components, and will work with virtually any transistors and is reliably self-starting. The voltage Vb can be taken from a divider, as shown at the right. If taken from a fixed source, flashing becomes slower as battery voltage falls. The lowest drive current into the base of Tr3 is about (Vbâ€”0,6 V)/(R2 + R4)....
Machine vision illumination stabilizer
The combination of Ql, Q2 and Ul form a hysteresis oscillator to stabilize lamp illumination. In operation, full wave bridge D3 operates directly from the ac line to supply unregulated dc to the lamp and also to the 10 V zener that provides power to the quad CMOS Schmitt trigger, Ul. When the lamp supply exceeds 115 V, Ql is turned ON, charging...
Automatic mooring light
Integrated-circuit Ulâ€”an LF351 or 741 op ampâ€”is used as a comparator to control the light. Resistors R2 and R3 provide a reference voltage of about 2.5 volts at pin 3 of Ul. When daylight falls on light-dependent resistor LDR1, its resistance is low: about 1000 ohms. In darkness, the LDR's resistance rises to about 1 megohm. Since Rl is...
300 to 1500kW straight with a generator of Lightning
300 ~ 1500kW direct distribution of Lightning generator for single capacity 300-1500kW straight with the generator of Lightning FIG. 300 to 1500kW straight with a generator of
A voice-activated lights control circuit
22W by Ct and R, RC Buck, rectified by n. c, filtering. vz 3V DC regulated output power, before U, V2 and MIC power supply. When the audio signal to the beam, the microphone MI
TWH9104 holiday lights ASIC
220V AC by the VDI-VD4 bridge rectifier to produce a full-wave pulsating voltage electricity for lights H1 ~ H4, the other side by R3 and VD4 buck regulator, C2 filtered output
DCDC single cell flashlight drive circuit diagram
Simple and easy to do single flashlight battery DC-DC driver circuit and leave the battery production. Figure Parametric voltage 1.5V,
CD71061 holiday lights ASIC
220V AC by VDl a VD4 bridge rectifier, resistor Rl0 buck regulator VD5 regulator and C2, after filtering supply electricity to the manifold. Manifold output trigger signal is d
MC81 holiday lights ASIC
220V AC by VDI ~ VD4 bridge rectifier, lights the way for Hl, H2 electricity, another pass Rl, R2 two resistors buck, limiting the capacitor CI, C2 filter manifold A power supp
SH-123 ASIC holiday lights
220V AC by VD1-VD4 bridge rectifier, all the way to supply four lights Hl - H4 electricity, another pass resistance Rl buck limit, filter capacitor C1 supply manifold A electri
SE9518 holiday lights ASIC
220V AC by VD1-VD4 bridge rectifier, all the way to eight lights H1 ~ H8 supply of electricity, the other passing RI drop pressure, VD5 regulator and filter cl A power supply m
A touch switch lighting circuit
220V AC by Ri buck, Diao!. C1 chain ferry flood ear, shouted for the regulator to l2V make [C collapse. The film hand touch under ridicule the MT electrode films, clutter body
MS51C61 holiday lights ASIC circuit
220V AC by VD1-VD4 bridge rectifier, all the way to supply four lights HI ~ H4 electricity, another pass down Rl pressure limiting, VD5 voltage supply
With TWH9248 9249 an auto lighting
220V AC by Cl buck, VDI rectifier, VD2 regulator and filter capacitor C2, output stable 12V DC voltage for use module A2, Al through internal A2 6V regulator outputs in 6V DC v
SR63 holiday lights ASIC
220V AC after VDI ~ VD4 bridge rectifier, the output of a point, all the way to direct electricity for lights H1 ~ H4; another way through Rl buck, VD5 regulator, about 5v DC o
SH-803R produced by high-power holiday lights
22, Ov AC by thyristor VSl ~ VS4 H1-H4 electricity for lights, on the other hand it down through the transformer T, VDI ~ VD4 rectifier, VD5 regulator and Cl filtered output of
Street light control circuit
Street wear trench pipe installation commonly used Concealed wiring methods. The control section is installed in the front door or in the centralized
Barricade warning lights flashing circuit
Foot using a battery-powered blinking warning lights roadblocks N, can H1 Wu AC power to local roads Shi I make barricades with warning. hF555 and RP1,
lights 5GM168 control circuit diagram
Family karaoke 0K lighting design of a variety of methods to control circuit, the control circuit described here is a kind of four-way light output,
Automatic light control circuit curtains
The circuit works as follows: every morning, light shines into the silicon photocell, generating a force, this force will transistor VT1 conduction,
300 to 1500kW direct distribution terminal lightning generator circuit
300 ~ 1500kW direct distribution of Lightning generator for single capacity 300-1500kW straight with the generator of Lightning FIG. 300 to 1500kW direct distribution terminal c lightning generator
Lighting controller circuit
Circuit works: The controller consists of a power supply circuit, a control circuit and audio amplifier is composed of three parts.
Eight multi-function lights synchronized chain of circuit SH803
It uses pattern SH803 flash IC, within reservoir eight kinds of programs and a variety of dimming, change the speed of light,
SZ-9201 uses three function lights chain circuit
It uses the mains supply via a simple DC rectifier circuit.
Flashing warning light produced by light control NE555 circuit
VDI, VD2, C3, C4 compose a simple half-wave rectifier capacitor step-down regulator circuit. After power across C3 can output 12V DC voltage of about, for the time base circuit electricity.
Colorful lights loop circuit
Circuit works: 220 V AC by C1 Buck, DW regulator, VD whole stream, C2 filtered output 12 V DC voltage supply control circuit. IC1 time base integrated circuit NE555 and R1, Rp, C3 composed
Ophthalmology light lamp switch circuit
Is a light remote control light switch circuit, remote control toys can be sufficient flashlight or laser pointer. Use as long as the torch for a photo at the photosensitive resistor RL2, RI.2 resistance was low, VT2 immediately turned on,
Easy street light control circuit
Pi is a good light can throw white moving lights circuit, it has a high sensitivity, stable performance and anti- interference good performance characteristics. Daytime photosensitive resistor RI.
Three lighting sound and light control switch circuits
This circuit uses a dedicated voice integrated circuits Ai (SK- type), its internal features bistable multivibrator and three inverting amplifier. 555 IC A2 for the delay control.
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