Schematic & Wiring Diagram

The circuit diagram of a three channel LED driver circuit using CAT3063 is apparent here. C4 is an ascribe clarify capacitor. R1 is the resistor acclimated for programming the achievement current. C3 is the achievement clarify capacitor. C1 and C2 are the accumulator capacitors of the centralized allegation pump circuit. A argumentation top at pin 5 will accredit the IC and a argumentation low on the aforementioned pin will drive the IC into abeyance mode. In the abeyance mode, the quiescent accepted is about according to zero. With the acclimated amount of R1, the LED accepted per approach will be 25mA. 

When powered up the CAT6063 operates in 1X approach i.e, the achievement voltage will be according to the ascribe voltage. If this achievement voltage is abundant to adapt the accepted through all LEDs, the IC charcoal 1X mode. If the achievement voltage is not acceptable abundant to adapt the adapted accepted through the LEDs, the accessory automatically switches to the 1.5X approach area the achievement voltage is 1.5 times the ascribe voltage. This action is again if anytime the IC is powered up or activate from abeyance mode.

This circuit of powerful flashing lamp is good use in vehicles. The LM395 IC based on circuit also known as super-transistor, which is terribly powerful integrated monolithic power transistor with options such as thermal protection, current limit etc. In fact, this circuit is almost indestructible.The IC will handle currents up to 1A 40V and switch in less than 500 nanoseconds. Resistor R1 and capacitor C1 determine the frequency of blinking. With the flash rate indicates the value is approximately 1 flash per second.

This circuit is IC controlled emergency light. This series of automatic switching-on of the sunshine on mains failure and battery charger with overcharge protection. When mains is absent, the relay RL2 is in deenergised state, feeding battery offer to the inverter section via its N / C contacts and switch S1.

The inverter section contains IC2 (NE555) that is used in a very stable fashion to supply sharp pulses at the rate of 50 Hz for driving the MOSFETs. The output of IC3 is fed to the gate of MOSFET (T4) directly whereas it's applied to MOSFET (T3) when inversion by gate transistor T2. so the facility amplifier designed around MOSFETs T3 and T4 functions in push-pull mode. The output across the secondary of transformer X2 can easily drive a 230-volt, 20-watt fluorescent tube. In case light is not needed to be on throughout mains failure, simply flip the switch S1 to off position. Battery overcharge preventer circuit is constructed around IC1 (LM308). Its non-inverting pin is held at a reference voltage of approximately 6.9 volts that is obtained using diode D5 (1N4148) and 6.2-volt zener D6.

The inverting pin of IC1 is connected to the positive terminal of battery. so when mains offer is gift, Comparator IC1 output is high, unless battery voltage exceeds 6.9 volts. therefore the transistor T1 is generally forward biased, that energises relay RL1. in this state the battery remains on charge via the N / O contacts of relays RL1 and current limiting resistor R2. When battery voltage exceeds 6.9 volts (overcharged condition), IC1 output goes low and gets deenergised relay RL1, and so stops more charging of battery. MOSFETs T3 and T4 may be mounted on suitable heat sinks.

This circuit is a lamp that turns on automatically when darkness falls and turns off when the sun rises. In fact, you can apply this circuit for any type of automatic night light. This circuit can be used to control lights or other electric high power with hundreds of watts

The circuit used an LDR to detect light. When the light is the resistance of LDR is low. So the voltage drop across R2 POT will be high. This keeps the transistor Q1 ON. The collector of Q1 (BC107) is coupled to the base of Q2 (SL100). So Q2 will turn off and so do over. The lamp will remain off.

When night falls, the resistance of LDR increases to cause the voltage across R2 POT fall below 0.6 V. This causes the transistor Q1 OFF turs that in turn activates the relay Q2.The and the bulb will light

Here is a simple circuit of the star of Christmas light that can be easily built, even for a beginner. The main advantage of this circuit is that it requires no transformer or IC.

Components such as resistors R1 and R2, capacitors C1, C2 and C3, diodes D1 and D2, and zener zD1 are used to develop a fairly constant voltage of 5V DC power that provides the current necessary to activate the triac multivibrator circuit and activate BT136 through LED1. The multivibrator circuit is constructed with two transistors BC548 (T1 and T2) and some passive components.

The frequency of the multivibrator circuit is controlled by the capacitors C4 and C5 and resistors R3 through R7. The output of the multivibrator circuit is connected to the transistor T3, which in turn drives the triac through LED1. During the positive half cycles of the multivibrator output, the transistor T3 is driven triac BT136 and lit the lamp. This circuit is an estimated cost of R 75

This circuit directly connected to the netting of electricity, voltage 220V electricity it could sting you. Avoid working in damp and directly with ground.

In this circuit, the SCR is required to be able to slowly range the intensity of an 120 volt lamp through managing plenty of time which the AC line voltage will be applied to the light while in every half cycle.

Caution:

This circuit can be straight connected to the AC power line and also needs to be inserted inside of a enclosure which will reduce direct contact with every of the parts. To prevent electric shock, never touching every component to the circuit while it is connected to the AC power line. A 2K, 10 watt electric power resistor is required to fall the line voltage as a result of 9 volts DC. This resistor could desolve related to 7 watts and also requirements a few ventilation.

Operation:

A couple of NPN transistors are employed to identify the start of each one half cycle and trigger the delay timer which often triggers the SCR by the end of the delay time. The delay time is set up by the current supply which can be controlled by a 4017 decade counter. The 1st be counted (pin 3) packages the current into a minimal that refers to about 7 milliseconds of delay, as well as almost all half cycle time so that the lamp is nearly off. Complete brightness is purchased to the sixth count (pin 1) which can be not connected so the current shall be highest and offer a minimum delay plus trigger the SCR close to the beginning of the cycle. The remaining 8 counts increment the brightness 4 steps up and 4 steps down in between highest and also minimal. Every step up or down supplies about twice or half the energy, so the intensity shows up to modify linearly. The brightness of every stage could be modified with all the 4 resistors (4. 3K, 4. 7K, 5. 6K, 7. 5K) connected on the counter outputs.

This circuit has become designed through Don Warkentien (WODEW) which suggsted introducing a tiny 47uF capacitor through ground to the junction on the current supply transistor (PNP) to relieve the a digital treading impact and so the lamp can lighten up and fade in a smoother style. The value of the capacitor depends on the 4017 counting rate, a quicker charge could need a small capacitor.

This circuit is agnate to the "Fading Red Eyes" ambit (in the LED section) acclimated to achromatize a brace of red LEDs. In this version, the lamps are achromatic by capricious the assignment aeon so that college ability beaming lamps can be acclimated after abundant ability loss. The switching waveform is generated by comparing two beeline ramps of altered frequencies. The college abundance access waveform (about 75 Hz.) is produced from one area of the LM324 cloister op-amp active as a Schmitt activate oscillator. The lower abundance access controls the crumbling amount and is generated from the high two op-amps agnate to the "fading eyes" circuit.

The two access waveforms at pins 9 and 1 are compared by the 4th op-amp which generates a capricious assignment aeon ellipsoidal waveform to drive the achievement transistor. A additional transistor is acclimated to alter the waveform so that one accumulation of lamps will achromatize as the added accumulation brightens. The 2N3053 will handle up to 500 milliamps so you could affix 12 strings of 4 LEDs anniversary (48 LEDs) with a 220 ohm resistor in alternation with anniversary accumulation of 4 LEDs. This would absolute about 250 milliamps. Or you can use three 4 volt, 200 mA Xmas timberline bulbs in series. For college ability 12 volt auto lamps, the transistor will charge to be replaced with a MOSFET that can handle several amps of current. See the cartoon beneath the schematic for accessible hookups.

This circuit is called the Brightness Control Lamps, which assignment to ascendancy the ablaze acuteness from the four-filament lamp (ie, the arena illuminator) is accurate by two AA or AAA batteries, for close-up pictures with a agenda camera. Of advance it can be acclimated in added ways.

P1 = 470K   Linear Potentiometer
R1 = 10K
R2 = 47K
R3 = 1K5
C1 = 22nF
C2 = 100µF   25V
D1,D2 = 1N4148
IC1 = 7555 or TS555CN
Q1 = BD681
LP1 = 1.5V 200mA Bulb
SW1 = SPST Switch
B1 = 3V Batteray