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IN-17 display module user manual

1. 7 Software Overview From a software point of view the IN 17 display module provides two NXP PCA9685 chips on an I2C bus The configuration of the solder jumpers SJ1 SJ5 determines the I2C addresses of the PWM controllers Refer to the NXP PCA9685 datasheet for more information Initialization You ve to initialize the PWM controllers before programming the PWM channels We recommend to program the chip s registers as follows same for both chips Meaning Don t clear Use internal clock AI Enable auto increment SLEEP Normal mode oscillator on SUB1 Don t respond to I2C subaddress 1 SUB2 Don t respond to I2C subaddress 2 SUB3 Don t respond to I2C subaddress 3 ALLCALL Respond to I2C address LED All Call Meaning Reserved INVRT Output logic state not inverted Outputs change on I2C ACK after writing all 4 registers of a OCH channel OUTDRV The LED outputs are configured as a totem pole structure OUTNE 1 0 When OE 1 the LED outputs are high impedance 1 If you set OCH to 0 and you program PWM channels continuously and at great speed the PWM controller s outputs may become invariant This happens because the PWM controller needs time to latch new values after it receives the I2C STOP command if new data comes in too quickly the PWM controller won t get a chance to start using the values With OCH set to 1 a PWM chan
2. resistor it will heat up too much and break The recommended limit is two fully illuminated digits or the equivalent spread over more digits User Manual 11 IN 17 Display Module 82 hs s h e 8 Disclaimer Axiris products are not designed authorized or warranted to be suitable for use in space nautical space military medical life critical or safety critical devices or equipment Axiris products are not designed authorized or warranted to be suitable for use in applications where failure or malfunction of an Axiris product can result in personal injury death property damage or environmental damage Axiris accepts no liability for inclusion or use of Axiris products in such applications and such inclusion or use is at the customer s own risk Should the customer use Axiris products for such application the customer shall indemnify and hold Axiris harmless against all claims and damages 9 Contact Information Official website http www axiris be 12 User Manual
3. tube The grey boxes denote closed solder jumpers see SJ1 SJ5 The resulting I2C addresses for each display module are shown beneath the red connectors User Manual 7 2 23 IN 17 Display Module C 1 j O D IN 17 Tubes Board Board Overview Label Description Screw hole for fitting the driver board and tubes board S1 K3 S2 Room for optional buttons K4 8 User Manual S IN 17 Display Module gt Q 3 y un oO D 6 Setting up the Module 1 Close solder jumpers to configure the I2C addresses of the PWM controllers 2 Solder wires on the pads of the external bus either on one side or both depending on your intended set up 3 If applicable fasten the driver board to a surface screw holes K3 and K4 4 If applicable solder buttons and wires on the tubes board S1 K3 S2 K4 5 Fit the light pipe into the holes the tubes 6 Put the tubes board into place on the driver board 7 Bind the central screw holes The screws and standoff serve as a conductor for the tube power 170 V As such the screws washers and standoff must be fitted exactly as shown on the picture to the right WARNING When you put the tubes board into place on the driver board do not exert force on the tubes they may start to leak or break under the pressure You can exert force on the printed circuit board instead User Manual 9 IN 17 Display Module 2A ese be
4. IN 17 Display Module Tubes amp Driver Board User Manual October 2013 IN 17 Display Module 2A AIS be Table of Contents 1 Features 3 2 Technical Specifications 3 3 Safety Precautions 4 4 IN 17 Driver Board 5 Board Overview 5 I2C Address Selection SJ1 SJ5 6 External Bus 7 5 IN 17 Tubes Board 8 Board Overview 8 6 Setting up the Module 9 7 Software 10 Overview 10 Initialization 10 Driving the Tubes and LEDs 11 8 Disclaimer 12 9 Contact Information 12 Revision History Date Authors Description 2013 10 05 Peter S heeren Initial release 2 User Manual IN 17 Display Module 2A AID be 1 Features Display module with 2 Russian IN 17 nixie tubes 2C interface module based on two PCA9865 PWM chips Fully static no need to multiplex the tubes The brightness of each digit is individually controllable The modules can be fitted into a standard 5 25 drive bay Possibility to mount push button switches on the PCB for user control RGB backlight LEDs for the tubes Backlight is guided to the tubes using light pipes Stacked PCB design using low profile MicroMatch connectors Power supply 5V DC logic 150 170V DC tubes Small size due to the extensive use of SMD components Multiple modules can be daisy chained max 31 pcs depending on HV power supply The driver board can drive other nixie tubes as well provided suitable connections are made 2 Techn
5. driving the cathodes in the left tube Pad for conducting the tube power to the driver board SJ1 SJ2 Solder jumpers for selecting the I2C addresses of the two PWM SJ3 SJ4 controllers SJ5 User Manual 5 IN 17 Display Module I2C Address Selection SJ1 SJ5 SJ5 Description SJ3 SJ4 A1 selection A2 selection A3 selection A4 selection 1 A5 selection When a solder jumper is left open the selected address line is logically one When a solder jumper is closed the selected address line is logically zero Use solder wick to open a previously closed solder jump Address line AO is hardwired For the PWM controller of the left tube AO is logically zero while AO of the PWM controller of the right tube is logically one Address Left Side Address Right Side Remarks 1000 000 b 1000 001 b 1000 010 b 1000 011 b 1101 110 b 1101 111b 1110 000 b 1110 001 b LED ALL CALL address is 1110 000 b SUBADR1 by default is 1110 001 b 1110 010 b 1110 011 b SUBADR2 by default is 1110 010 b 1110 100 b 1110 101 b SUBADR3 by default is 1110 100 b 1110 110 b 1110 111 b 1111 000 b 1111 001 b 1111 010 b 1111 011 b Addresses 1111 OXX b are used for the 10 bit addressing scheme 1111 100 b 1111 101 b 1111 110 D 1111 111 b Addresses 1111 1XX b are res
6. erved for future use You can t use the configuration in red The reason is all PWM controllers will respond to the LED ALL CALL address after power up You can use the addresses in green providing there are no other I2C slaves on the bus that use these addresses If you only connect IN 17 modules to the I2C bus you can safely apply these addresses Refer to the NXP PCA9685 datasheet for more information 6 User Manual IN 17 Display Module od a C TA WM u C b External Bus Description HV HV High voltage GND GND Ground 5V 5V 5 V Power supply I2C clock line SCL SCL I2C data line SDA SDA Connect a 170 V power supply to HV SCL and SDA levels are 5 V Connect these lines to an I2C bus The ground line is common for the 5 V and 170 V supplies and the I2C lines The external bus is exposed on two sides of the board allowing you to hook up multiple IN 17 display modules The corresponding solder pads on each side are interconnected hence you re free to choose on which side to connect the various external lines Here s an example diagram featuring three IN 17 display modules Axiris KIWO X N o o amp 170V GND 5V SDL SDA ple LIN She v oa 4388 sjom sjm me NLEUZST oe 4 12 H23 R25 12 R23 R25 a Well RA ax 3 j H J K K1 j 1011 001 b 1011 000 b 1011 011 b 1011 010 b 1011 101b 1011 100 b Right tube Left tube Right tube Left tube Right tube Left
7. ical Specifications IN 17 Display Module Weight 23 g with IN 17 tubes and mechanical parts Dimensions 32 mm x 43 mm x 38 mm W x D x H IN 17 Driver Board Weight 7g Dimensions 32 mm x 43 mm x 10 mm W x D x H IN 17 Tubes Board Weight 15 g with IN 17 tubes Dimensions 32 mm x 43 mm x 33 mm W x D x H User Manual 3 IN 17 Display Module 2A AIDES be 3 Safety Precautions SAFETY PRECAUTIONS WHEN THE MODULE IS POWERED ON DO NOT TOUCH THE DRIVER BOARD OR TUBES BOARD THE SCREWS AND STANDOFF BETWEEN THE BOARDS ACT AS A CONDUCTOR FOR THE HIGH VOLTAGE ON THE TUBES AVOID TOUCHING THE SCREWS AND STANDOFF WHEN THE HIGH VOLTAGE IS TURNED ON DO NOT EXERT FORCE ON THE TUBES THEY MAY BREAK DO NOT ILLUMINATE MORE THAN TWO DIGITS WITHIN A TUBE DRIVING MORE DIGITS MAY HEAT UP AND ULTIMATELY DESTROY THE RESISTORS ON THE TUBES BOARD 4 User Manual 2 S IN 17 Display Module e 3 m n D 4 IN 17 Driver Board Board Overview Ch Le C Os O EERLEEEEREN EN AERZZZIEZEu GET Scot amp A 39 K 427 a Label Description Screw hole for fitting together the driver board and tubes board K3 KA Screw holes for fixing the board to a surface HV GND Solder pads for connecting and or chaining the power supply high 5V SCL voltage I2C bus and common ground SDA K2 Connector for driving the cathodes in the right tube K1 Connector for
8. nel is programmed directly after I2C ACK and the PWM output changes right away 10 User Manual IN 17 Display Module 2 AID be Driving the Tubes and LEDs Each PWM controller on the driver board steers one tube s digits and the underlying RGB LED Each PWM controller incorporates 16 PWM channels The corresponding output pins are called LED 0 15 Each PWM channel as a resolution of 12 bits for a value of 0 4095 The PWM controller provides a prescaler setting for adjusting the duration of the PWM cycle The default value is 30 which translates to 196 9 Hz There s no need to reprogram this value The logic of a PWM output is either positive or negative Positive logic means the target is fully illuminated when the PWM channel is maximally turned on Negative logic means the target is fully illuminated when the PWM channel is completely turned off Logic Target Logic Target Positive Digit O Positive Digit 2 Positive Digit 9 Positive Digit 1 Positive Digit 8 Negative Blue Positive Digit 7 Negative Red Positive Digit 6 Negative Green Positive Digit 5 Not connected Positive Digit 4 Not connected Positive Digit 3 Not connected You may illuminate two or more digits and once However the more digits you drive the more current will flow through the resistor next to the tube If too much current flows through the

IN-17 display module user manual

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