Abstract: The present subject matter relates to devices, systems, and methods for applying pesticides, herbicides, and other treatment chemicals to a surface. A roller application device for use in delivery of treatment chemicals to a landscape surface includes a handle assembly having a fluid connector configured to be connected to a treatment chemical source, and a roller applicator is connected to the handle assembly but configured to rotate about an axis. The handle assembly includes a fluid dispenser configured to deliver a treatment chemical from the treatment chemical source to the roller applicator, and the roller applicator is configured to absorb the treatment chemical in an outer surface of the roller applicator and transfer the treatment chemical to a surface upon contact with the surface.

Abstract: In an embodiment, a mobile robotic device includes a mobile base and a mounting column fixed to the mobile base. The robotic device further includes a seven-degree-of-freedom (7DOF) robotic arm, including a rotatable joint that enables rotation of the 7DOF robotic arm relative to the mounting column. The robotic device additionally includes a perception housing comprising at least one sensor, where the mounting column, the rotatable joint of the 7DOF arm, and the perception housing are arranged in a stacked tower such that the rotatable joint of the 7DOF arm is above the mounting column and below the perception housing.

Abstract: A tote package including a middle section that forms a bottom portion, a first side section connecting the first side section and the middle section, wherein the first side section creates a first side portion of the tote package that tapers upwardly from the bottom portion to a top portion of the tote package, and a second side section that is opposite of the that connecting the second side section and the middle section, wherein the second side section creates a second side portion of the tote package that tapers upwardly from the bottom portion to the top portion of the top portion of the tote package, a handle positioned on the top portion of the tote package, wherein the middle section, first side section, and second side section intersect to create a tapered front portion of the tote package that extends beyond the bottom portion.

Abstract: A tote package including a middle section that forms a bottom portion, a first side section connecting the first side section and the middle section, wherein the first side section creates a first side portion of the tote package that tapers upwardly from the bottom portion to a top portion of the tote package, and a second side section that is opposite of the that connecting the second side section and the middle section, wherein the second side section creates a second side portion of the tote package that tapers upwardly from the bottom portion to the top portion of the top portion of the tote package, a handle positioned on the top portion of the tote package, wherein the middle section, first side section, and second side section intersect to create a tapered front portion of the tote package that extends beyond the bottom portion.

Abstract: An example tote package is disclosed for carrying a load external to a UAV. The tote package may be generated by folding a sheet of material. The sheet may include a middle section, a first side section, and a second side section. When the sheet is folded, the middle section may create a bottom portion of the tote package. Additionally, the first side section may create a first side portion tapering up from the edge of the bottom portion to the middle of the top portion of the tote package. Furthermore, the second side section may create a second side portion tapering up from the opposite edge to the middle of the top portion. At the top portion, the first and second sections may connect to create a handle. The first side, second side, and middle sections may be folded to create front and back portions of the tote package.

Abstract: An example tote package is disclosed for carrying a load external to a UAV. The tote package may be generated by folding a sheet of material. The sheet may include a middle section, a first side section, and a second side section. When the sheet is folded, the middle section may create a bottom portion of the tote package. Additionally, the first side section may create a first side portion tapering up from the edge of the bottom portion to the middle of the top portion of the tote package. Furthermore, the second side section may create a second side portion tapering up from the opposite edge to the middle of the top portion. At the top portion, the first and second sections may connect to create a handle. The first side, second side, and middle sections may be folded to create front and back portions of the tote package.

Abstract: A Bi-Directional and Adjustable Current Source (“BACS”) for providing an input voltage to a mute/standby control pin of a power stage integrated circuit (“IC”) of an amplifier input with a voltage signal that is linear, where an output of the BACS and the input to the control pin are shunted with a capacitor, is described. The BACS may include a first switch in signal communication with a high voltage reference and a first current source in signal communication with the first switch. The BACS may also include a second switch in signal communication with a low voltage reference and a second current source in signal communication with the second switch. The BACS may further include a directional current element in signal communication with both the first current source, the second current source, the output of the BACS, the input to the control pin, and the capacitor, where the directional current element is configured to prevent current flow from the output BACS to the first current source.

Abstract: A Bi-Directional and Adjustable Current Source (“BACS”) for providing an input voltage to a mute/standby control pin of a power stage integrated circuit (“IC”) of an amplifier input with a voltage signal that is linear, where an output of the BACS and the input to the control pin are shunted with a capacitor, is described. The BACS may include a first switch in signal communication with a high voltage reference and a first current source in signal communication with the first switch. The BACS may also include a second switch in signal communication with a low voltage reference and a second current source in signal communication with the second switch. The BACS may further include a directional current element in signal communication with both the first current source, the second current source, the output of the BACS, the input to the control pin, and the capacitor, where the directional current element is configured to prevent current flow from the output BACS to the first current source.

Abstract: A Bi-Directional and Adjustable Current Source (“BACS”) for providing an amplifier input with a voltage signal that is linear, where an output of the BACS and the amplifier input are shunted with a capacitor, is described. The BACS may include a first switch in signal communication with a high voltage reference and a first current source in signal communication with the first switch. The BACS may also include a second switch in signal communication with a low voltage reference and a second current source in signal communication with the second switch. The BACS may further include a directional current element in signal communication with both the first current source, the second current source, the output of the BACS, the amplifier input, and the capacitor, where the directional current element is configured to prevent current flow from the output BACS to the first current source.

Abstract: A Bi-Directional and Adjustable Current Source (“BACS”) for providing an amplifier input with a voltage signal that is linear, where an output of the BACS and the amplifier input are shunted with a capacitor, is described. The BACS may include a first switch in signal communication with a high voltage reference and a first current source in signal communication with the first switch. The BACS may also include a second switch in signal communication with a low voltage reference and a second current source in signal communication with the second switch. The BACS may further include a directional current element in signal communication with both the first current source, the second current source, the output of the BACS, the amplifier input, and the capacitor, where the directional current element is configured to prevent current flow from the output BACS to the first current source.