Half-AA Battery Holder

prusaprinters

<p>One of my Apple IIGSes needed a new battery. (I think it's been through at least two over the past 30+ years.) It's a ROM 01, which means the original battery had a couple wires sticking out the ends that were soldered to the motherboard. A previous replacement involved clipping the original out and replacing it with a battery with coiled wiring that would slip over the stubs still attached to the motherboard. I decided to go with the approach Apple took with the ROM 3 IIGS: a half-AA battery holder to allow easy replacement when needed. (Also, half-AA 3.6V lithium batteries are still readily available in 2019...picked one up at Fry's over the weekend. The original, hard-wired type? Not so much.)</p> <p>The source thing didn't include a half-AA holder, so I took the code for the AA holder and modified it:</p> <p>module flexbatterHalfAA(n=1){ flexbatter(n=n,l=26.1,d=14.4,hf=0.80,shd=2.5,el=0.5,eps=0.28); } It took two tries to get the length right and to dial in the spring parameters so it'd have the right amount of give. A bit of 26-ga. solid wire and some hot glue, and it's good to go.</p> <h3>Print Settings</h3> <p><strong>Printer Brand:</strong></p> <p>Anet</p> <p class="detail-setting printer"><strong>Printer: </strong> <div><p>A8</p></div> <p><strong>Rafts:</strong></p> <p>No</p> <p class="detail-setting supports"><strong>Supports: </strong> <div><p>No</p></div> <p><strong>Resolution:</strong></p> <p>0.2 mm</p> <p class="detail-setting infill"><strong>Infill: </strong> <div><p>20%</p></div> <p><strong>Filament:</strong> AmazonBasics PETG red</p> <p><br/> <p class="detail-setting notes"><strong>Notes: </strong></p> </p><div><p>With flow cut way back to 85% (90% at the start) and retraction set to 5 mm and 50 mm/s, this was the cleanest PETG print I've gotten yet, with almost no stringing.</p></div> </p></p></p> Category: Electronics