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ITS1A CLOCK

Configuration ............................................................................................................................................ 20

Presets .................................................................................................................................................. 20

Alexa ..................................................................................................................................................... 21

Backlighting and Underlighting ................................................................................................................. 21

Motion Sensor .......................................................................................................................................... 23

PCB ...................................................................................................................................... 24

Schematic ............................................................................................................................ 26

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Summary of Contents for ITS1A

Page 1: ...1 ITS1A CLOCK ITS1A Clock ...

Page 2: ...IC1 Socket 8 Transistors 9 Programming Header 9 Reset Button 9 ESP 01 Socket 9 Inductor 10 Electrolytic Capacitors 10 Power Test 10 Voltage Regulator 11 Display Header and Connector 12 Connectors 12 Resistors 14 Check the Tubes 14 Solder the Tubes 15 Colon LEDs 17 Final Assembly 17 Final Assembly 17 The Moment of Truth 18 Initial Configuration 19 ...

Page 3: ...3 ITS1A CLOCK Configuration 20 Presets 20 Alexa 21 Backlighting and Underlighting 21 Motion Sensor 23 Appendix A PCB 24 Appendix B Schematic 26 ...

Page 4: ...with these voltages and who can guarantee that the completed product meets all local safety requirements and certifications during operation Furthermore the finished article must be in a casing that isolates people from access to these voltages during operation Certain parts of the PCB may maintain high voltage after it is unplugged from a power source therefore care must be taken to ensure that t...

Page 5: ...8POS J1 1 CONN HEADER FMALE 20POS 1 GOLD 6 MACH SCREW PAN HEAD SLOTTED M3 2 HEX NUT 0 217 M3 6 WASHER SPLIT LOCK M3 STEEL 4 HEX STANDOFF M3 BRASS 18MM Display Board Display board R1 R2 R3 R4 4 RES 47K OHM 1 4W 5 CF MINI LED1 4 4 LED GREEN DIFFUSED ICE CUBE T H J1 1 CONN HEADER 100 SNGL R A 20POS Main Board Please note that some of the pictures are from a previous revision of the board This revisio...

Page 6: ...the others bend the leads close to the body Also note that there are two sets of resistors marked R1 R4 The ones that are all the same value are for the display board not this board those will have LED written on the paper strip Zener Diodes Solder in the Zener diodes Z1 Z5 Again pay attention to the polarity There are a mix of Zener voltages so make sure you solder the right ones All of the Zener...

Page 7: ...7 ITS1A CLOCK ...

Page 8: ...ins need to be soldered there is no data connection This should go on the top side of the board like this Ceramic Capacitors Solder in the ceramic capacitors C1 C19 C22 and C23 IC1 Socket Solder in the IC1 socket The notch should point towards the back of the board ...

Page 9: ...f you think you might want to program the clock with the ESP 01 in place solder in the programming header J2 However I have found that most programmers don t work through this Reset Button Solder in the reset button as below ESP 01 Socket If you want to be able to remove the ESP 01 for example to program it in an external programmer solder in the 4x2 ESP 01 header I would recommend this ...

Page 10: ...ill face the same way One technique to get them to line up nicely is to use tape along the tops to hold them in place Solder in C14 C17 All of the stripes will face the same way but this will be the opposite way of C2 C13 Solder in C20 and C21 Power Test You can test the power now You need to do this test before you solder in the voltage regulator Once that is in the power supply will be disabled ...

Page 11: ...0V test point It should be around 270V i e 6x45V 6 Check the voltage at the 250V R test point not the 250V test point note the R It should be around 250V 8V Unplug the power supply Monitor the voltage on the 150V test point The 1MΩ bleeder resistor should drain the 150V arm within a second Monitor the voltage on the 300V check point you will install a bleeder resistor for this later Only proceed o...

Page 12: ...s It connects at right angles to the main board A 1x20 socket is soldered to the main board and a 20 pin right angled header is soldered to the display board The two are held together using right angled brackets This is one way to make sure that everything lines up when the socket and header are soldered in place 1 Install the brackets on the main board ...

Page 13: ...board but do not solder it in place 3 Insert the 1x20 right angled header in to the display board as in the picture below but do not solder note that this is the back of the display board 4 Insert the header display board in to the socket on the main board ...

Page 14: ...es you should check that they work Removing a broken tube is not easy There are a couple of things that can be checked before they are soldered in The first is to check that there are no shorts between the pins The second is to check that the tubes contain neon The easiest way to do this is to hold them next to a plasma globe or anything that generates a few KV Plasma globes are fairly cheap these...

Page 15: ...can sometimes snap off at or near the glass so you should avoid applying too much force in that vicinity anyway Once the leads are reasonably straight starting with any lead you like work around the tube and trim each one slightly shorter than the last This will make it easier to insert the leads in to the holes because you only have to insert one lead at a time Now insert the leads into one end o...

Page 16: ...ITS1A CLOCK Once you have all the leads inserted you will notice that the tube is quite firmly held in place however line up the tube so that that it is sitting roughly square then solder one of the leads ...

Page 17: ...rk surface adjust the remaining tubes and tack them in place with by soldering a single lead 4 Eyeball the results Do the tubes line up properly If not repeat the above steps 5 When everything looks OK Solder another lead in place opposite the previous lead Check again 6 If everything is still OK Do another lead Etc etc 7 Trim the leads flush with the back of the PCB Colon LEDs LEDs are polarized ...

Page 18: ... it will start counting up with each tube one ahead of the tube to its left This is intended to test that all of the segments light up and extinguish properly In addition the colon leds should blink on and off If not all segments light or some segments stay lit when they shouldn t don t panic First of all leave it running for a few minutes to see if it fixes itself In fact the datasheet recommends...

Page 19: ...the time on the clock right from this page Hit the Set Clock Time button It will set the time to whatever the time is on your phone PC The clock should stop counting and display the time The display might go blank this is because it is pre configured to only be on between 6am and 10pm You can change this in the main config screen You can also configure the clock right from the captive portal Hit t...

Page 20: ...example in the picture above is for Eastern Standard Time The clock will automatically adjust for DST in the given timezone You can access other settings by hitting the menu button at the top left the three lines in a circle Any change you make will take immediate effect but it won t be saved to flash for up to 1 minute i e if you reset or power cycle the clock before the changes are written to fl...

Page 21: ...will see all the switches that can be turned on and off For example you can say Alexa turn on date and it will display the date Say Alexa turn off date and it will switch back to the time The names of these switches can be changed on the Alexa config screen on the clock You will have to re discover devices after you have done this Backlighting and Underlighting You decide There are signal lines to...

Page 22: ...4 so you can have underlighting as well as backlighting One builder of this kit bought a bunch of neopixel modules like these and mounted them on short tubes to stand them off the back of the board You need the WS2812B modules I also designed some tiles some small PCBs that take surface mount 3535 neopixels from PCBWAY You will need to be able to solder surface mount components for these and then ...

Page 23: ... the pin or hole marked RX on the programming header at the back Attach 0V ground to any convenient GND point on the board Likewise attach 5V to any convenient 5V point on the board Personally I find it useful to connect an LED across signal and 0V so I can see if the sensor is actually working If you do don t forget a current limiting resistor The clock will work fine without a motion sensor atta...

Page 24: ...24 ITS1A CLOCK Appendix A PCB ...

Page 25: ...25 ITS1A CLOCK ...

Page 26: ...26 ITS1A CLOCK Appendix B Schematic ...

Page 27: ...27 ITS1A CLOCK ...

Page 28: ...28 ITS1A CLOCK ...

Page 29: ...29 ITS1A CLOCK ...

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