Embedded Files
The plastic parts were designed in Fusion 360 and Onshape. If you want to modify them, the original .f3d files are accessible. Designing the cases to get parts to fit correctly took many iterations. The .stl files for 3D printing are what most people will want. I have printed these using PLA plastic and .2mm layer height. My Prusa printers do a great job. Minimal support was the goal in these designs. Rotate all the pieces to minimze the need for support material. On the backline case I paint on the support material to try and minimize the amount used.
Multi Battery Cases for the SeeedStudio ESP32-C3
These are the cases I am using myself. They use the Xiao ESP32-C3 with the external antenna so that communication seems reliable. These cases can use any of three battery options. Use the walmart rechargable battery banks with a usb cord to connect the power. Super Simple!! Or do a little more soldering and put an external switch into the back switch plate and then use either a 3 cell AA battery pack or a LiPo battery. The little Xiao controller has a charging circuit for the external LiPo battery. The cases with the switch have a really clean look and are a little cheaper--especially if the AA batteries are used; although I am not sure how long the devices will last before needing new batteries. The easiest (no soldering) method is to just use the power banks. Although the new power banks from Walmart are smaller and so they are loose in the case. Use some foam or an adapter to hold them in place. The new backline case is easier to assemble, but the power terminals for the lipo battery are difficult to access now. Just make you life simple and use the Walmart power bank to power the backline unit.
Laser Trays designed in OnShape.
Laser Trays designed in OnShape.
There are two tray options depending on what battery system you are using and how much soldering you want to do.
Link to the folder with all the STL files. (both versions)
The system needs two or three Laser Trays, depending on how many intervals are to be measured. The cover keeps the laser wires from breaking. Print an extra back leg so when you drop it and a leg breaks you have an extra ready to go. You would hate to be without your larryrocktimer for any length of time!!
Laser Tray With 3 cell battery pack with built in switch--the SHORT COVER
The integrated battery pack and switch is easy to use. It should use a 5volt laser. Here is the link to the onshape document. I hope it is shared if you want to modify it.
Laser Tray With External Switch and 2 Cell pack--the LONG COVER
This version uses a 2 cell AA battery case with an external switch that goes in the bottom of the tray. This requires a 3volt laser (although the 5v laser will probably turn on) It covers up all the wiring and battery and the 2 cell battery holder is a little cheaper than the 3cell holder with switch.
Here is the link to the OnShape design. Hopefully you can download it from there if you want to modfiy it.
Hog Line "Sender" Unit
Hog Line "Sender" Unit
Here is the multibattery hog line case for the xiao esp32-c3 with a tab on the top cover to hold it more securely. Holes go into the battery case for other battery options. Print the case and the cover in the orientation shown. Assembly is straightforward with the external antenna attached to the left side of the case.
stl files: HogLineAssembly CoverWithTabs BatteryCover
Back Line "Receiver & Display" Unit
Back Line "Receiver & Display" Unit
New plastic cases are necessary for the additional electronics. The redesign resulted in a MUCH easier assembly of the back line unit. There is a bottom part and a top part that pushes into the bottom part. The screen and the photodiode are in the top part and everything gets wired up before connecting with a press fit. There will be assembly videos coming shortly. Note that there are two versions of the bottom part--one that is printed ready to use with the walmart powerpacks and one for AA battery packs or a rechargable LiPo battery (But these are a pain to wire up--make it simple and get the walmart battery if you can)
The whole assembly with top and bottom halves pressed together, and covers installed.
Bottom part showing the optional battery spacer for the walmart battery
Bottom part for walmart battery in position for printing.
TopPart without the screen cover and light sensor cover
Press the covers into place for a nice clean look and to hold the components in place
When putting the back line components on the printer plate, I suggest the following orientation. It uses very little support material. Printing with 20% infill, .2mm Structural layer height will take about 7 hours to print and cost about $1.50 of plastic. I am using Sunlu PLA2.0+ filament.
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