{"id":84119,"key":"OSHE_Growbot_Guidance_System","title":"OSHE Growbot Guidance System","latest":{"id":1262794,"timestamp":"2026-09-01T00:19:02Z"},"content_model":"wikitext","license":{"url":"https://www.appropedia.org/Appropedia:Copyrights","title":"CC-BY-SA-4.0"},"source":"{{OSHE Growbot navigation}}\n\n== Procedure - Guidance System Electronics ==\n\nThe guidance system consists of a wire generating circuit and a sensor circuit. It can be connected to an ADC (ADS1115) and a Raspberry Pi to control two ODrive motors.\n\n{|class=\"wikitable\"\n|+ Wire Guidance Materials\n! Description\n! Count\n|-\n| Generator PCB\n| 1\n|-\n| Sensor PCB\n| 1\n|-\n| ADS1115 ADC\n| 1\n|-\n| 3.3 kΩ Resistor\n| 1\n|-\n| 12 kΩ Resistor\n| 1\n|-\n| 47 Ω Resistor\n| 1\n|-\n| 10 kΩ Resistor\n| 4\n|-\n| 1 MΩ Resistor\n| 4\n|-\n| 4.7 kΩ Potentiometer\n| 1\n|-\n| 12 kΩ Resistor\n| 1\n|-\n| 100 nF Capacitor\n| 2\n|-\n| 1.2 nF Capacitor\n| 1\n|-\n| 1 uF Capacitor\n| 1\n|-\n| 22 nF Capacitor\n| 2\n|-\n| 1 mH Inductor\n| 2\n|-\n| LM324N Amplifier\n| 1\n|-\n| NE555 Timer\n| 1\n|-\n| 2.1x5.5mm barrel connector\n| 1\n|-\n| 2 positions terminal connector\n| 3\n|-\n| 3 positions right angle pin header\n| 2\n|-\n| ~1 meter 20AWG cable (for the inductors)\n| 1\n|-\n| ~100' 22 gauge multi-strand wire (for the following wire)\n| 1\n|}\n\n{| class=\"wikitable\"\n|+ Tools\n| Soldering Iron\n|}\n\n(Photos will be added when Growbot is accessible)\n\n# [[File:x.jpg|thumb|]] Solder all components onto each of the PCBs.{{Clear}}\n# [[File:x.jpg|thumb|]] Wire the Sensor PCB, Generator PCB, ADC and Raspberry Pi.{{Clear}}\n# [[File:x.jpg|thumb|]] Run autoTest.py on the Raspberry Pi with 0 as command.{{Clear}}\n# [[File:x.jpg|thumb|]] Record MAX value (inductor closest to following wire) and MIN inductor (far away from following wire).{{Clear}}\n# [[File:x.jpg|thumb|]] Insert MAX and MIN values into autoTest.py.{{Clear}}\n# [[File:x.jpg|thumb|]] Ready to test with motors. See < > to install motors.{{Clear}}\n\n== Procedure - Guidance System Antennas ==\n\nThe guidance system antennas are 3D printed and can be assembled with 3D printed pins or screws and bolts. It consists of 2 sets of three parts. The STL files can be accessed on the OSF page. <add link to OSF>\n\n{| class=\"wikitable\"\n|+ Wire Guidance Materials\n! Description\n! Count\n|-\n| 3M Screws\n| 6\n|-\n| 3M bolts\n| 4\n|-\n| 3M Bolt Slots (fits in aluminum extrusion)\n| 2\n|}\n\n{| class=\"wikitable\"\n|+ Tools\n| Super glue\n|-\n| Small zip ties\n|}\n\n(Photos will be added when Growbot is accessible)\n\n# [[File:x.jpg|thumb|]] Mount both BotEnds onto aluminum extrusion with an M3 screw.{{Clear}}\n# [[File:x.jpg|thumb|]] Connect both WireHolders in each BotEnd with an M3 screw and bolt.{{Clear}}\n# [[File:x.jpg|thumb|]] Connect both SensorEnds in each WireHolder with an M3 screw and bolt.{{Clear}}\n# [[File:x.jpg|thumb|]] Place inductor wires in WireHolder slots and secure with a ziptie.{{Clear}}\n# [[File:x.jpg|thumb|]] Apply a dab of super glue to SensorEnd and set inductor in the circular slot.{{Clear}}\n# [[File:x.jpg|thumb|]] Adjust the width between sensors for your liking.{{Clear}}\n\n{{Page data}}\n\n[[Category:OSHE]]\n[[Category:Growbot]]\n[[Category:Open source hardware members]]\n[[Category:3-D printer users]]\n[[Category:3D printing]]"}