CN201413622Y - Driving circuit - Google Patents

Abstract

A driving circuit is characterized in that the driving circuit consists of a 4017 integrated circuit and a ULN 2003 integrated circuit, a 13th pin of the 4017 integrated circuit is grounded, a 16th pin thereof is connected with a power source +0.5V and a capacitor, an 8th pin of the 4017 integrated circuit and the other end of the capacitor are grounded, a 3rd pin, a 2nd pin, a 4th pin, a 7th pin,a 10th pin, a 1st pin and a 5th pin of the 4017 integrated circuit are respectively connected with a 1st pin, a 2nd pin, a 3rd pin, a 4th pin, a 5th pin, a 6th pin and a 7th pin of the ULN2003 integrated circuit, a 9th pin, a 11th pin and a 12th pin of the 4017 integrated circuit is connected with a resistor, the other end of the resistor is grounded, and an 8th pin of the ULN2003 is grounded. The driving circuit is specially used for a control circuit of a motorcycle digital display meter, receives instructions of a central processor, and then drives a digital tube display circuit and a small square lamp display circuit through a decoding circuit.

Description

Driving circuit

Technical field

The utility model relates to a kind of driving circuit, refers in particular to the special-purpose driving circuit of a kind of motorcycle Displaying Meter.

Background technology

At present, the motorcycle instrument major part on the market is the mechanical pointer instrument, and it is liquid crystal display (LCD) instrument that small part is arranged.The odometer fractional part of mechanical pointer instrument rotates the rotation that drives instrument inside counting gear by the motorcycle flexible axle and counts.The total kilometrage number that gear write down is to do artificial change, as long as instrument is opened, and handsetting gear, the total kilometrage number will be changed.This shortcoming is a potential hidden danger to motorcycle producer.Because the three guarantees phase of motorcycle is by purchasing the car time and the distance travelled number is determined.Regulation according to country: buy by oneself from the car, motorcycle in 1 year or distance travelled to be no more than 6000Km be the three guarantees term of validity.This shortcoming of mechanical pointer instrument causes tremendous loss and no small trouble might for motorcycle producer.The mileage of mechanical pointer instrument shows, oil level shows, engine speed shows it is to be made of mechanical gauge outfit, the machinery gauge outfit mainly is made up of parts such as copper coil and hairsprings, therefore resistance to shock is poor, this also is a machinery instrument short main cause in serviceable life, gauge outfit is made of metal, and also can consume a large amount of raw material metals every year therefore.And the weight of instrument is also heavier, and this also can increase the transportation cost of instrument.Because being the swing by pointer, the demonstration of mechanical pointer instrument shows that therefore, its accuracy and intuitive are not high yet.The application of motorcycle LCD instrument has overcome a lot of not enough places of mechanical pointer instrument, but the LCD of liquid crystal display instrument has it self weak point.LCD itself is very " enervated " just, is subjected to the influence of ambient temperature, humidity easily, and cost is also higher.It is made of liquid crystal, transparency electrode, glass flake etc., and resistance to shock is also relatively poor.The serviceable life of LCD is not long yet, generally uses 50,000 hours.In case liquid crystal display displays form and size moulding just can not be made any change, to give exploitation and produce diversified motorcycle instrument and bring very big difficulty, this also is a reason not used in a large number of motorcycle LCD instrument up to the present.Therefore, need exploitation motorcycle digital Displaying Meter.Motorcycle digital Displaying Meter control circuit comprises driving circuit, drives charactron display circuit and little side's lamp display circuit thereby driving circuit receives the instruction of central processing unit by decoding scheme.

The utility model content

The purpose of this utility model is to provide a kind of driving circuit, and it is exclusively used in the control circuit of motorcycle digital Displaying Meter.

For achieving the above object, the solution that the utility model is taked is: a kind of driving circuit, it is made up of 4017 integrated circuit and ULN2003 integrated circuit, 13 pin of 4017 integrated circuit (CK INH end) ground connection, 16 pin (vdd terminal) connect power supply+0.5V and electric capacity, 8 pin of 4017 integrated circuit (VSS end) and electric capacity other end ground connection, 3 pin of 4017 integrated circuit (Q0 end), 2 pin (Q1 end), 4 pin (Q2 end), 7 pin (Q3 end), 10 pin (Q4 end), 1 pin (Q5 end), 5 pin (Q6 end) respectively with 1 pin (IN1 end) of ULN2003 integrated circuit, 2 pin (IN2 end), 3 pin (IN3 end), 4 pin (IN4 end), 5 pin (IN5 end), 6 pin (IN6 end), 7 pin (IN7 end) connect, 9 pin of 4017 integrated circuit (Q8 end), 11 pin (Q9 end), 12 pin (C0 end) connecting resistance, resistance other end ground connection, 8 pin of ULN2003 integrated circuit (COMMON end) ground connection.

This driving circuit is made up of 4017 integrated circuit and ULN2003 integrated circuit, and it is exclusively used in the control circuit of motorcycle digital Displaying Meter, thereby the instruction that receives central processing unit drives charactron display circuit and little side's lamp display circuit by decoding scheme.

Description of drawings

Fig. 1 is the driving circuit electrical connection diagram.

Embodiment

Below in conjunction with embodiment and accompanying drawing thereof the utility model is remake description.

Referring to Fig. 1, a kind of driving circuit, it is made up of 4017 integrated circuit and ULN2003 integrated circuit, 13 pin of 4017 integrated circuit (CK INH end) ground connection, 16 pin (vdd terminal) connect power supply+0.5V and electric capacity, 8 pin of 4017 integrated circuit (VSS end) and electric capacity other end ground connection, 3 pin of 4017 integrated circuit (Q0 end), 2 pin (Q1 end), 4 pin (Q2 end), 7 pin (Q3 end), 10 pin (Q4 end), 1 pin (Q5 end), 5 pin (Q6 end) respectively with 1 pin (IN1 end) of ULN2003 integrated circuit, 2 pin (IN2 end), 3 pin (IN3 end), 4 pin (IN4 end), 5 pin (IN5 end), 6 pin (IN6 end), 7 pin (IN7 end) connect, 9 pin of 4017 integrated circuit (Q8 end), 11 pin (Q9 end), 12 pin (C0 end) connecting resistance, resistance other end ground connection, 8 pin of ULN2003 integrated circuit (COMMON end) ground connection.

Claims (1)

1, a kind of driving circuit, it is characterized in that: it is made up of 4017 integrated circuit and ULN2003 integrated circuit, 13 pin ground connection of 4017 integrated circuit, 16 pin connect power supply+0.5V and electric capacity, 8 pin of 4017 integrated circuit and electric capacity other end ground connection, 3 pin of 4017 integrated circuit, 2 pin, 4 pin, 7 pin, 10 pin, 1 pin, 5 pin are connected with 1 pin, 2 pin, 3 pin, 4 pin, 5 pin, 6 pin, 7 pin of ULN2003 integrated circuit respectively, 9 pin of 4017 integrated circuit, 11 pin, 12 pin connecting resistances, resistance other end ground connection, 8 pin ground connection of ULN2003 integrated circuit.