Schematic Volt: lamp

Showing posts with label lamp. Show all posts

Saturday, November 8, 2014

RGB Solar Lamp

This deluxe solar-powered light uses a battery and solar cells salvaged from a solar lamp with a four-cell battery (4.8 V nominal terminal voltage).

Circuit diagram :

RGB Solar Lamp Circuit Diagram

The circuit can operate from any DC voltage around this value and its current consumption, at 20 mA, is low. This means that the battery can give up to ﬁve days of operation. The circuit consists of an Atmel ATtiny microcontroller which drives a red, a green and a blue LED directly from three port pins. Series resistors are of course included to limit the LED current. The microcontroller drives the LEDs in sequence to produce an RGB running light effect. The microcontroller is also responsible for ensuring that the light automatically switches on when it gets dark and off when it is light. The light sensor is made from one of the solar cells from a bro-ken solar lamp (it is more common for the battery to fail rather than the solar cells).

The power output of this cell is not important, as the microcontroller only measures its output voltage using its internal A/D converter connected to pin PB4. The project is ideal for beginners, as a ready-programmed microcontroller is avail-able from the Elektor Shop (order code 100581-41).

Tuesday, November 4, 2014

Simple Fog Lamp Sensor

For several years now, a rear fog lamp has been mandatory for trailers and caravans in order to improve visibility under foggy conditions. When this fog lamp is switched on, the fog lamp of the pulling vehicle must be switched of to avoid irritating reflections. For this purpose, a mechanical switch is now built into the 13-way female connector in order to switch of the fog lamp of the pulling vehicle and switch on the fog lamp of the trailer or caravan. For anyone who uses a 7-way connector, this switching can also be implemented electronically with the aid of the circuit illustrated here.

Fog Lamp Sensor Circuit Diagram:

Here a type P521 optocoupler detects whether the fog lamp of the caravan or trailer is connected. If the fog lamp is switched on in the car, a current flows through the caravan fog lamp via diodes D1 and D2. This causes the LED in the optocoupler to light up, with the result that the photo-transistor conducts and energies the relay via transistor T1. The relay switches of the fog lamp of the car. For anyone who’s not all thumbs, this small circuit can easily be built on a small piece of perforated circuit board and then fitted somewhere close to the rear lamp fitting of the pulling vehicle.

Tuesday, October 28, 2014

Ballast and Starter Fluorescent Lamp

Installation of fluorescent lamp circuits, we can see that most of the foot fluorescent lamp mounted in series with the ballast and partly installed pareral the starter.

Ballast

Ballast resistor is basically a coil (choke coil) is an iron core. Fluorescent lamp ballasts in the works:

Provide the initial installation of the electrodes in order to provide free electrons in large numbers
Provide a potential wave big enough to hold a spark between two electrodes
Preventing the occurrence of an increased flow of sparks that exceeds a certain limit for each lamp size.

Besides ballast serves to reduce the influence of the changes that interfere with the movement of light (stroboscopic) and reduce the loss side (auxiliary losses). Therefore, each fluorescent lamp ballast has always had a planned to power, voltage, and frequency are adjusted to the light TLnya respectively.

Starter

Starter on a fluorescent lamp consists of a small glass balloon filled with noble gases. Inside the bubble there are two metal electrodes as dual filament. The distance between the two electrodes are arranged with a certain distance so that the starter will turn on voltage of 100-200 V. Starter switch serves as the delay time (time delay switch) are connected in parallel with two-foot fluorescent lamp.

When the fluorescent lamp is connected to the voltage of tissues, then in a short time starter filament is connected (on) and then decide again if the lamp has been lit with a stable NE. At the time of the filament is connected, a large current will flow through the ballast from the power grid, then to the lamp electrodes, wire electrodes and the other starter, for subsequent return to the network. The existence of these currents will make the incandescent lamp electrodes and removing electrons.

Meanwhile, the voltage at the starter has been lost, so that the starter went out and become cool. Both dual metal electrodes in the starter going straight back and decided that the current is flowing. Because of the sudden termination of this, the ballast will be raised an electromotive force is quite high. Shock voltage is in series with line voltage. When raised at the right time, the voltage at the two filament lamps TL will be high enough to ignite the filament-provided tube filaments are hot enough.

In the first cycle of the tube is not already on the events as described above will be repeated, until the tube lights up. After the fluorescent lamp is lit, the starter will be parallel with the lamp. Therefore, the voltage on the lamp voltage is lower than the starter, the starter will remain extinguished.

To reduce the spark at the spark electrode bi-metal can be mounted a small capacitor in parallel with the starter. Installation of condenser is also able to improve the termination of the current in the starter and reduce radio interference.

Wednesday, October 22, 2014

New Dark Activated Terrace Lamp

Compact circuit, Can be wired in parallel to existing switches

This device allows one or more lamps to illuminate at sunset and turn off at dawn.Q1 and Q2 form a trigger device for the SCR, providing short pulses at 100Hz frequency. Pulse duration is set by R2 and C1.When the light hits R1, the photo resistor assumes a very low resistance value, almost shorting C1 and preventing circuit operation. When R1 is in the dark, its resistance value becomes very high thus enabling circuit operation.

Circuit Diagram:

Dark Activated 220 volt AC Lamp Circuit Diagram

Parts:

R1 = LDR
R2 = 100K
R3 = 200K
R4 = 470R
R5 = 12KR6 = 1KR7 = 470R
C1 = 10nF-63V
D1 = TIC106D
D2 = 1N4007D3 = 1N4007D4 = 1N4007
D5 = 1N4007
Q1 = BD327
Q2 = BD337
SK1 = Female Mains Socket

Notes:

R3 allows fine setting of operating threshold and R2 value can be raised to 150K maximum.
Several lamps wired in parallel can be connected to the circuit, provided total power dissipation of the load does not exceed about 300 - 500W.
PL1 can be omitted and the input mains supply wires connected in parallel to any switch controlling lamps. In this case, if the switch is left open, the circuit will be able to drive the lamps; if the switch is closed, the lamps will illuminate and the circuit will be by-passed.
Warning! The circuit is connected to 230Vac mains, and then some parts in the circuit board are subjected to lethal potential! Avoid touching the circuit when plugged and enclose it in a plastic box.

Source: Red Free Circuit Models

Saturday, October 4, 2014

220 Volt Disco Lamp circuit

This 220 Volt disco lamp circuit is not a voice switch (VOX), because this circuit is too dumb to differentiate between musical sound and human voice. This is more of a voice-activated sound activated. An interesting application is to control the lighting in your disk automatically by the musical sound of high-power amplifier, when the music signal is dominating the sound space. Light nightclub circuit schematic diagram is shown below.

You can use the microphone coil or condenser microphone for this circuit. Make sure that the electrolytic capacitor is rated for 16 volts or more. The potentiometer is shown in the diagram is used to adjust the gain of the pre-amplification. You can adjust this knob to get a proper sound level of the relay would be activated.

Part List Of Disco Lamp circuit

R1 : 22k 1/4 watt resistor
R2 : 4K7 watt resistor
R3 : 2K2 watt resistor
R4,R8 : 10K watt resistor
R5 : 33K watt resistor
R6 : 56K watt resistor
R7 : 1M watt resistor
Potensio: 50K
C1 : 470uf/35V electrolytic capacitor
C2 : 22n ceramic capacitor
C3 : 100n ceramic capacitor
C4 : 1Uf/50V electrolyticcapacitor
D1 - D5 : 1N4007
D6 : Zener 5.1v
D7 : 1N4148
IC : CD 4069
SCR : FIR 3D
Mic : Mic Condensor

Thursday, September 25, 2014

Simple Neon Lamp Tester Circuit

This tester can also be used to check IF transformers used in AC mains operated radio receiver.
Though this tester is not very accurate, it can give a reasonably good indication about the condition of the components being tested.
Neon lamps are ideal indicators for simple testers to check large resistances of leaky capacitors and mains lF transformers.
For accuracy, the component being tested should not have any shunting resistance. lf a shunting resistance is present, disconnect one end of it before testing.
Such a defective component cannot be easily tested with simple test equipment.
The tester circuit uses a relaxation oscillator, the frequency of which is determined by capacitor Cl and the external resistance (leakage resistance of the component under test) between the probes.
Two flashes per second on neon lamp indicates 200 megohm leakage resistance, four flashes l00 megohm, eight flashes 50 megohm, and so on.
Moreover, as it tests capacitors at a fairly high voltage—closer to that of the operating voltage-it offers an advantage over a VTVM which is operated at a low voltage and gives inconclusive results.
Being high-voltage, low-current devices, the neon lamps are very sensitive.
The grid of an IF amplifier usually has a high AC impedance and its primary is operated at a high voltage.
A small leak in the lFl` can cause considerable trouble.

Friday, August 22, 2014

LED or Lamp Pulsar Circuit

This schema operates a LED in pulsing mode, i.e. the LED goes from off state, lights up gradually, then dims gradually, etc. This operation mode is obtained by a triangular wave generator formed by two op-amps contained in a very cheap 8 pin DIL case IC. Q1 ensures current buffering, in order to obtain a better load drive. R4 & C1 are the timing components: using the values shown in the parts list, the total period is about 4 seconds.

Parts:

R1 = 4.7K
R2 = 4.7K
R3 = 22K
R4 = 2.2M
R5 = 10K
R6 = 47R
C1 = 1µF-63V
Q1 = BC337
D1 = Red Led
IC1 = LM358

Notes:

* The most satisfying results are obtained adopting for R4 a value ranging from 220K to 4M7. * Adopting for R4 a value below 220K, the pulsing effect will be indistinguishable from a normal blinking effect. * The LED can be any type and color. * You can use a filament lamp bulb instead of the LED, provided it is rated in the range 3.2 to 6V, 200mA max. * Using a bulb as a load, R6 must be omitted. * Voltage supply range can be 4 to 6V: 4.5V is the best compromise. * Do not supply the schema with voltages exceeding 6V: it will work less good and Q1 could be damaged when a bulb will be used as the load. * At 6V supply, increase R6 value to 100 Ohm.

Sunday, August 10, 2014

Flashing Lamp circuit

This is flashing lamp schema.This schema operate with 6V power supply.You can fix this schema for your bick or for your car.Here I have used common transsistor 2N3904.

Note

# Build this on a PCB

# This schema operates with 6V