Hours on gas-discharge indicators. Clock scheme on gas-discharge indicators

Using gas-discharge indicators, you can make a very interesting clock Nixie Clock. In this respect, a person opens many opportunities. Schemes for the clock have the ability to use a wide variety. Additionally, creative people can think about interesting design watches.

Some believe that gas-discharge lamps have many shortcomings, and therefore it is better to use luminescent analogs, but this is misleading. In the first case, a person receives material that stably works and does not overheat excessively. While fluorescent lamps burn out pretty quickly, which is a serious problem.

Important elements of the clock on the indicators

If you do not take into account the case of the device and the indicators themselves, the main part is the microcircuit. It allows you to display real time in devices. Additionally, transistors and capacitors are included in the model. For power supplies, batteries are mainly used. Transformers, as well as inductors are not equipped with all the hours on the gas-discharge indicators.

How to assemble a wristwatch with CB303 transistors?

Hours on the gas-discharge indicators set of transistors СВ303 includes bipolar type. First of all, it should be noted that they practically do not overheat during operation. If we talk about gas-discharge lamps, then it's important to use new ones from the store. Otherwise, they are very few in the clock. For the designation of numbers, contacts are most often used.

The control chip is usually applied to the K15554 series, but it belongs to the class of three-channel, the outputs to the power supply has two. Condensers wristwatches on gas-discharge indicators mainly operate with a small capacity. In some cases, you can find stabilizers in devices. In this situation, the load from the transistors will be significantly removed. As a case it is quite possible to use a conventional box.

Scheme of devices with stabilizers

The clock circuit on gas-discharge indicators with stabilizers must necessarily include pulse converters. They are necessary in devices in order to transmit the signal from the chip. Condensers The standard clock scheme for gas-discharge indicators assumes a capacity of not more than 50 pF. Transistors, in turn, are turned on by a bipolar type.

If we consider a system with three capacitors, then there should be three pins on the chip. The limiting resistance of the transistors is required to withstand 6 ohms. If we talk about the load current, then it in the clock averaged 74 A. In this case, use dual-board is highly discouraged. This is due to the fact that the output voltage will increase significantly. As a result, the person will have to put fuses.

Clock using an inductor

The maximum load of the inductor can survive at a level of 5 A. Power supply for their operation is very necessary. The compilation process itself is carried out in two stages. First of all, capacitors are connected to the work. In this case, they are used only electrolytic type. In the second stage, resistors are activated in pairs. Gas discharge indicators in this situation, the internal resistance is kept up to 50 Ohm. To protect the device, many advise to use a protection system that eliminates short circuits.

Models on rectifiers with indicators IN-12B

The gas discharge indicators IN-12B with rectifiers allow to keep the frequency in the circuit at the level of 60 Hz. Due to this, the output voltage does not exceed 15 V. Stabilizers in the boards, as a rule, are used linear type. Protection from short circuits in this case is very important. In order for the transistors to withstand a large resistance, they are used with the PP200 labeling.

Bipolar elements in the clock, as a rule, are rarely used. Directly the boards are installed for K155 series watches. Thermal conductivity is quite good, and on the whole they have excellent characteristics. Converters in the system are used quite rarely. In cooling, the resistors in principle do not need, and this is a plus. Gas discharge indicators in this situation, the resistance is kept to 50 Ohm.

Variants with temperature sensors

Hours on gas-discharge indicators with temperature sensors allow you to monitor the main elements in the circuit. As a rule, it is very difficult in advance to calculate the thermal load for a certain pair of resistors. As a result, the installed fuse can not save the situation. Transformers suffer from the temperature rise in the clock. When a large voltage is applied to the secondary winding, its integrity may be impaired.

Clock using converters

Converters in watches are most often used the most usual. In this case, they allow the device not to install a transformer. However, there are also minuses in this case, and they should be taken into account. First of all, the disadvantage of the converters is a large input voltage, which can sometimes exceed 16 V. The coordination of all levels in this situation is significantly complicated.

Switching cathodes can be carried out with a small delay. Solve all these problems with microcontrollers. Experts advise to use them exactly the series "Mega 8". To adjust the clock, only three buttons are needed. Some people find it difficult to choose LEDs before starting the assembly. To date, the most suitable items are considered to be elements with red color. Look at the end they in the apartment will be simply amazing. For figures in gas-discharge lamps, as always, contacts are used.

Ventilation system in devices

The ventilation system in the clock can be different. The simplest way to cool the work of the device is to consider natural ventilation using the holes on the body. They can be done from two sides at once. It is important to understand that the converter is overheating most of the time. Given this, overlapping it with a board in the case is highly discouraged. If we consider models with power supplies at 15 V, then the maximum temperature of the converters there will be approximately 40 degrees. This is the norm, and there is no need to equip the Nixie Clock clock with a cooler.

Clock scheme with internal generators

Schemes on gas-discharge indicators with internal generators assume the use of power supplies at 30 V. Internal resistance in this case will rise to 2 ohms. The maximum load on the transistors is 5 A. To select the clock signal, you need to use microcontrollers. The accuracy of the current flow depends exclusively on quartz. Transistors simple circuits on gas-discharge indicators, as a rule, provide a bipolar type.

Temperature sensors are rarely installed. This is explained by the fact that the system does not need a transformer with a secondary winding. As a result, the thermal conductivity will be rather low. Anode keys for ports are applied. They are suitable only for motherboards for three connectors. The microcontrollers of the "Mega 8" series in this case will be relevant. A high monitoring threshold is required to flash the board.

Hours on capacitors PP22

Hours on gas-discharge indicators on capacitors of this type allow more stable transmission of the signal. The monitoring threshold in this case will be quite high. Resistors in watches are only used with a resistance of not less than 6 ohms. The input voltage must be at least 6 V. The levels are coordinated only by switching cathodes.

Converters for this type of condenser are suitable for the "Step Up" series. Additionally, care should be taken to protect the system to prevent short circuits. Chips to capacitors use only two outputs. In this case, the ports can be up to five pieces. Stabilizers for capacitors are mainly used in the linear class. The limiting input voltage must be at least 5 V.

Is there a clock with two chips?

Hours on gas-discharge indicators with two microcircuits for today are quite rare. They are necessary for faster synchronization of the process. In this case switching cathodes of lamps is carried out for a few ns. Bipolar transistors for such watches can not be used. The minimum resistance level in this case should be at the level of 50 Ohm.

In turn, the transistors are required to withstand a voltage of 30 A. Converters in the clock, as a rule, set the impulse type. Due to this, switching to a binary format is fast. Directly matching levels occurs in the microcontroller. Adjust the voltage in the device can be due to the stabilizer. However, the minimum capacitance of the capacitor should be 22 pF.

Models on fuses КА445

These fuses are electrolytic in their type. The limiting capacitance they have is exactly 10 pF. At the beginning of the circuit, they are usually located in front of the transistors. LEDs in watches are important to use with high bandwidth. At least three ports must be provided on the chip. In this case, the stabilizer of the linear type is soldered necessarily. With a high input voltage, the fuse will largely help.

If you exclude the use of a converter in the clock, then you can take a transformer with a secondary winding. It is installed in front of the power supply. Fuses experts recommend using only a fusible type. They will serve in the hours for a long time. Before quartz resistors it is important to install with a limit of 33 ohms. The power supply should be rated at 15 V. As a result, the limiting frequency in the system will fluctuate around 60 Hz.