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Light Dimmer Circuits
Unidirectional thyristor dimmer lights triggered ordinary transistor circuit
Crystal is a one-way ordinary transistor triggered threatened tube dimmer light circuit, VT2, V hired composition complementary amplifier to form the thyristor VT1 trigger circ
Fade one lamp dimming switch circuit
Fade-in fade-out light switch can turn on and off when the lamp brightness changes slowly, and the brightness can be adjusted. (1) One of fade-dimming lamp switch circuit circu
BA5173 HT7706 dimming control ASIC
FIG VDI, VD2, Rl and Cl form resistance voltage half-wave rectifier circuit, the output DC voltage 5v supply manifold with electricity. R2 for the manifold provides AC zero-cro
Simple fourth gear dimmer switch circuit
Easy to take along four dimmer switch circuit shown in Figure 8, which has a 4-speed brightness of combination: When the switch Sl, S2 and S3 compete portion is closed, the lam
Stepping HM4246 touch dimmer light circuit
Development and production of special touch dimmer integrated circuit, it has a dark, medium, light, take along a touch against the four side light function for zero trigger, h
The two lamp-dimmer circuits differ in that (a) employs a single-time-constant trigger network and (b) uses a double-time-constant trigger circuit that reduces hysteresis effects and thereby extends the effective range of the light-control potentiometer. (Hysteresisre-fers to a difference in the control potentiometer setting at which the lamp...
The zener provides a constant voltage of 20 V to unijunction transistor Ql, except at the end of each half-cycle of the input when the line voltage drops to zero. Initially, the voltage across capacitor Cl is zero and capacitor C2 cannot charge to trigger Ql. Cl will begin to charge, but because the voltage is low, C2 will be charged to a...
This very special mains-operated dimmer for domestic or industrial lights is not available in proprietary form: it ena
Lamp II is a household lamp. When the switch is in the center position, the lamp is operated on half-wave rectified ac; the ef
This wide-range light dimmer circuit uses a unijunction transistor and a pulse transformer to provide phase control for the TRIAC. The circuit operates from a 115 volt, 60 Hz source and can control up to 800 watts of power to incandescent lights. The power to the lights is controlled by varying the conduction angle of the TRIAC from 0Â° to about...
AC Lamp dimmer
A full range power controller suitable for lamp dimming and similar applications operate from a 120 volt, 60 Hz ac source, and can control up to 1000 watts of power to incandescent bulbs. The power to the bulbs is varied by controlling the conduction angle of TRIAC Ql. At the end of each positive half-cycle when the applied voltage drops below...
This cross fader circuit can be used for fading between two slide projectors. As R3 is moved to either side of center, one triac is fired earlier in each half cycle, and the other iater.
Dc lamp dimmer
A low power, low cost dc lamp dimmer for a two-wire portable "flashlight" can be realized with little or no heatsinking. In addition, a single potentiometer, R3 adjusts lamp brightness. Battery power is stored in Cl for Ul, which is a free-running multivibrator whose frequency is determined by Rl, R2, R3, R4, and C2.
Capacitive Dimmer switch circuit
Capacitive dimmer switch circuit shown in Figure 9. It is the use of capacitive reactance principle of alternating pairs made.
PT2102 dimming control ASIC
220V AC via a resistor Rl buck, VDI rectifier, VD2 and c5 filtered output voltage of approximately 9V DC voltage supply manifold electricity. R3 for the manifold input AC synch
BA5173 produced by multi-function lamp dimmer
220V AC by R3 buck figure, VDI rectifier, VD2 and C3 filtered output voltage of about 3,9V DC supply set to block BA5173 electricity. Rl is manifold zero-crossing detector curr
A one-touch bedside lamp dimmer circuit
1C foot VIII made a number of training device, from the trigger terminal CI. f-off positive input pulse. End by supporting a n quotient output level. Lose. commercial electric
Simple dimming lights circuit diagram
The figure is a simple dimming lights line, the light is adjusted by the multi-speed control switch K. When K to position "1" lights out; when K to position "2", the light
A linear dimming controller
AC 30V through I). - After the dish rectified by its positive terminal connected to the fuse IA IOOW bulb, the negative terminal is directly connected to the thyristor connecte
Stepping BA2101 touch dimmer light circuit
BA2101 dimming using ASIC to produce a barrel of light touch stepping, Its a non- constant lamp suitable heir light. ~ Times each touch electrode sheet M, E lamp brightness can
BA2181 stepping touch dimmer light circuit
BA2181 dimming using ASIC production touch Stepping dimming lights, 4 eup with loud power consumption is low, anti-interference ability, small as stable by bite, make use of se
Stepping CS6061A touch dimmer light circuit
CS6061A integrated circuit fabrication is the use of touch-step dimming lights, it has two state of the female state switching function, and J as reliable, able to adapt to lon
Touch-type FET stepless dimmer
Capacitors C2, C3, diode VD2, VD3 and other components simple capacitive half-wave rectifier buck power supply, the entire supply control circuit of electricity, the power supp
555 practical DC stepless dimmer circuit diagram
Circuit shown in Figure dimmer to 555 as the core component. 555 and R1, RP, R2, C1 composition astable multivibrator, the oscillation frequency f 1.44/(R1 + RP + R2) C1, aroun
Halogen light dimmer
The dimmer circuit in Figure 1 can change the intensity of the light from zero to maximum. The dimmer operates at approximately 12V, unlike the usual ones that function by adjusting the firing angle of the 110 or 220V mains supply. The dimmer works to inject a constant current into the halogen lamp and to regulate that current using...
Electronic transformer dims halogen lamp
Figure 1 shows a simplified schematic of a typical low-voltage halogen-lamp transformer without the protection circuits and EMI filter. Q1 and Q2 with C2 and C3 comprise a classic, half-bridge topology that works in self-oscillating mode. The circuit provides positive feedback by placing the primary windings of transformer T1 in series with the...
Dimming AC Using A PIC10F200
The IR remote control for the system is also based on a PIC10F200. It uses the wake-up on change function of the I/O to wake it whenever a button is pressed. It then generates one of two different modulated outputs, depending on which button was pressed. The carrier frequency is 38 kHz to match the receiver modules in the dimmer circuit.
Pretty nice design for a cheap consumer grade flashlight. The power switch was not exactly as shown since there was an option to have the lamp on solid.
Brightness Control for small Lamps
Switch-mode driven 1.5V bulbs. This device was designed on request, to control the light intensity of four filament lamps (i.e. a ring illuminator) powered by two AA or AAA batteries, for close-up pictures with a digital camera. Obviously it can be used in other ways, at anyone`s will. Portable unit - 3V battery supply.
TRIAC Light Dimmer
This little circuit can be used to dim lights up to about 350 watts. It uses a simple, standard TRIAC circuit that, in my expirience, generates very little heat. Please note that this circuit cannot be used with fluorescent lights.
Lamp Dimmer / Motor Speed Control
The diac is a common component used to trigger triacs. The construction of a diac is similar to that with a transistor, but with both junctions doped to similar levels so that the two junctions' revers break down characteristics are similar. This is a fun project to demonstrate the use of a pair of bipolar transistors operating in their negative...
Current Dimmer for white 24 LED array
This simple Linear circuit provides continuously variable regulated current (~25-400mA) from a 4-6 Volt source. I chose a linear design for simplicity, reliability, ease of repair, and to avoid switching EMI in my Cave Radios. The circuit requires only 0.2V headroom above the parallel LED Array voltage to provide regulation at maximum current....
Light Sensing 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