[et_pb_section admin_label=”section” background_color=”#132c47″ inner_shadow=”off” parallax=”on” transparent_background=”off” allow_player_pause=”off” parallax_method=”off” padding_mobile=”off” make_fullwidth=”off” use_custom_width=”off” width_unit=”on” make_equal=”off” use_custom_gutter=”off”][et_pb_row admin_label=”row”][et_pb_column type=”4_4″][et_pb_text admin_label=”Text” background_layout=”dark” text_orientation=”center” header_font_size=”50px” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n
[\/et_pb_text][et_pb_divider admin_label=”Divider” color=”#ffffff” show_divider=”off” height=”60″] [\/et_pb_divider][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”Row”][et_pb_column type=”4_4″][et_pb_text admin_label=”Text” background_layout=”light” text_orientation=”left” text_text_color=”#ffffff” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n
The Pulse Train Hat is an add-on board for the Rapsberry Pi computer and allows clean, fast and accurate pulses to be created using simple ASCII commands.<\/span><\/p>\n There are many\u00a0hardware designs\u00a0where a variable frequency pulse is needed, but one that is the most popular is for driving stepper\/servo motors that use pulse and direction lines.<\/span><\/p>\n Motors like this are found in machines such as 3D Printers, CNC machines, Robot Arms and not to mention the other endless motion control and automation machines.<\/span><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”row”][et_pb_column type=”1_2″][et_pb_text admin_label=”Text” background_layout=”light” text_orientation=”left” text_text_color=”#ffffff” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n Controlling motors may seem simple, but when you get down to detailed control, it can all become very confusing and a big learning curve.<\/span><\/p>\n With the PTHAT ( Pulse Train Hat ) add-on for the Raspberry Pi and this support site, we plan to make that task very simple and allow everyone to easily create their automation product.<\/span><\/p>\n When controlling a motor, you have a lot of different tasks to consider, such as speed, ramping, interpolation, accuracy, counters, gearing to mention a few.<\/span><\/p>\n Please note although the PTHAT is crammed with commands and features, it is still and will always be under development as we get feed back and fix any bugs or add features requests as required. For this reason we have provided an easy way to upgrade new releases of the firmware by supplying each mainboard with a Jtag programmer. Please check out the Firmware link for more details<\/span><\/em>.<\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″][et_pb_image admin_label=”Image” src=”https:\/\/pthat.com\/wp-content\/uploads\/2016\/12\/front.png” show_in_lightbox=”off” url_new_window=”off” use_overlay=”off” animation=”left” sticky=”off” align=”left” force_fullwidth=”off” always_center_on_mobile=”on” use_border_color=”off” border_color=”#ffffff” border_style=”solid”] [\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section admin_label=”section” fullwidth=”off” inner_shadow=”off” parallax=”off” module_id=”builder”][et_pb_row admin_label=”Row”][et_pb_column type=”4_4″][et_pb_text admin_label=”Text” background_layout=”light” text_orientation=”left” header_font_size=”50px” use_border_color=”off” border_color=”#ffffff” border_style=”solid” header_text_color=”#444444″ text_text_color=”#444444″]<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”Row”][et_pb_column type=”1_2″][et_pb_blurb admin_label=”Blurb1″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n Complies to the Raspberry Pi HAT specifications. Designed to allow access to all the Raspberry Pi GPIO pins via extended header pins.<\/span><\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb2″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n Accepts simple Serial commands in ASCII format.<\/span><\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb3″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n On Board Arm Cortex M4 processor running at 100MHz<\/span><\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb4″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n Dedicated Direct digital synthesizer (DDS) pulse\u00a0generators with 0.004Hz resolution for each channel.<\/span><\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb5″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n Up to 4 individual pulse train outputs\u00a0(X,Y,Z,E)<\/span><\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb6″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n Step, Direction and enable 5v outputs for each channel.<\/span><\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb7″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n Limit Switch and Emergency Stop inputs.<\/span><\/p>\n [\/et_pb_blurb][\/et_pb_column][et_pb_column type=”1_2″][et_pb_blurb admin_label=”Blurb8″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n Three Aux switched 5 volts lines that can be used for switching on\/off devices.<\/span><\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb9″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n 2 ADC inputs for monitoring sensors or for speed control etc<\/span><\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb10″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n Counter for each pulse train with auto stop.<\/span><\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb11″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n UP\/Down Ramping\u00a0to allow motors to run at higher than normal speeds.<\/span><\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb12″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n Pulse train speeds of 0.004 HZ to\u00a0500kHz output (Recommended 100kHz Max due to buffer switching could cause jitter).\u00a0 500kHz with 2018 model or 2017 model with Capacitor Modification.<\/span><\/span><\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb13″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n JTAG connector for easy updating of the firmware updates or programming your own firmware.<\/span><\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb14″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n [\/et_pb_blurb][et_pb_blurb admin_label=”Blurb14″ url_new_window=”off” use_icon=”on” font_icon=”%%28%%” icon_color=”#7EBEC5″ use_circle=”off” circle_color=”#7EBEC5″ use_circle_border=”off” circle_border_color=”#7EBEC5″ icon_placement=”left” animation=”left” background_layout=”light” text_orientation=”left” use_icon_font_size=”off” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n CE\u00a0certified\/ROHS compliant<\/span><\/p>\n [\/et_pb_blurb][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section admin_label=”section” fullwidth=”off” specialty=”off” inner_shadow=”off” parallax=”off” module_id=”layouts” transparent_background=”off” background_color=”#313f55″ allow_player_pause=”off” parallax_method=”off” padding_mobile=”off” make_fullwidth=”off” use_custom_width=”off” width_unit=”on” make_equal=”off” use_custom_gutter=”off”][et_pb_row admin_label=”row”][et_pb_column type=”1_2″][et_pb_image admin_label=”Image” src=”https:\/\/pthat.com\/wp-content\/uploads\/2016\/12\/Overviewscope10000Hz3.jpg” url_new_window=”on” animation=”right” show_in_lightbox=”off” use_overlay=”off” sticky=”off” align=”left” force_fullwidth=”off” always_center_on_mobile=”on” use_border_color=”off” border_color=”#ffffff” border_style=”solid” url=”https:\/\/pthat.com\/index.php\/scopeshots\/”] [\/et_pb_image][\/et_pb_column][et_pb_column type=”1_2″][et_pb_divider admin_label=”Divider” color=”#ffffff” show_divider=”off” height=”70″] [\/et_pb_divider][et_pb_text admin_label=”Text” background_layout=”dark” text_orientation=”left” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n By using high resolution DDS generators we can generate clean fast pulses that are ideal for high speeds and also interpolation when syncing motors is critical. For example, If you need to stop and start 4 motors on a machine that are all travelling different distances, at the same time then this can be achieved easily with some simple commands. The hard work and monitoring of this task is take care of by the ARM processor.<\/span><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”row”][et_pb_column type=”1_2″][et_pb_divider admin_label=”Divider” color=”#ffffff” show_divider=”off” height=”40″] [\/et_pb_divider][et_pb_text admin_label=”Text” background_layout=”dark” text_orientation=”left” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n The Raspberry Pi GPIO ports are 3.3 volts, yet most motor driver inputs are 5 volts. the PTHAT takes care of the up scaling of these voltages and all outputs are brought out and buffered to 5 volts.<\/span><\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″][et_pb_image admin_label=”Image” src=”https:\/\/pthat.com\/wp-content\/uploads\/2016\/12\/overviewvolatgeshifter.jpg” url_new_window=”off” animation=”left” show_in_lightbox=”off” use_overlay=”off” sticky=”off” align=”left” force_fullwidth=”off” always_center_on_mobile=”on” use_border_color=”off” border_color=”#ffffff” border_style=”solid”] [\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=”row”][et_pb_column type=”1_2″][et_pb_image admin_label=”Image” src=”https:\/\/pthat.com\/wp-content\/uploads\/2016\/12\/overview4motorcontrol.jpg” url_new_window=”off” animation=”right” show_in_lightbox=”off” use_overlay=”off” sticky=”off” align=”left” force_fullwidth=”off” always_center_on_mobile=”on” use_border_color=”off” border_color=”#ffffff” border_style=”solid”] [\/et_pb_image][\/et_pb_column][et_pb_column type=”1_2″][et_pb_divider admin_label=”Divider” color=”#ffffff” show_divider=”off” height=”70″] [\/et_pb_divider][et_pb_text admin_label=”Text” background_layout=”dark” text_orientation=”left” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n We appreciate that not everyone wants to control 4 motors, so we are offering the PTHAT as a single 1 channel add-on board and also a PTHAT Top Hat which adds the extra 3 channels. Please see the pictures that give more of an idea.<\/span><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section admin_label=”Section” fullwidth=”off” specialty=”off” transparent_background=”off” allow_player_pause=”off” inner_shadow=”off” parallax=”off” parallax_method=”off” custom_padding=”0px||0px|” padding_mobile=”off” make_fullwidth=”off” use_custom_width=”off” width_unit=”on” make_equal=”off” use_custom_gutter=”off” background_color=”#2ea3f2″][et_pb_row admin_label=”Row”][et_pb_column type=”4_4″][et_pb_text admin_label=”Text” background_layout=”dark” text_orientation=”center” header_font_size=”75px” use_border_color=”off” border_color=”#ffffff” border_style=”solid”]<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section admin_label=”Section” fullwidth=”on” specialty=”off” transparent_background=”off” allow_player_pause=”off” inner_shadow=”off” parallax=”off” parallax_method=”off” custom_padding=”|40px||40px” custom_padding_last_edited=”off|desktop” padding_mobile=”off” make_fullwidth=”off” use_custom_width=”off” width_unit=”on” make_equal=”off” use_custom_gutter=”off”][et_pb_fullwidth_code admin_label=”Fullwidth Code”]\nThe Pulse Train Hat has the following features:<\/h2>\n
2 PWM Channels-12bit Pulse Width Modulation (Firmware V5.3 upwards)<\/h4>\n
Closer look\u00a0at the PCB’s<\/h1>\n