GB Cartridge Probe Holder for Battery replacement

prusaprinters

<p>An overkilled Game-Boy Cartridge holder to keep SRAM powered during a battery replacement and thus keeping your precious saves.</p> <p>Taking use of Test-Point at the back of cartridge PCB.<br/> TP1 : RawPower -&gt; Direct connection to SRAM's +VCC<br/> TP2 : +3V pin of Battery/GB power manager µC (ref 134A or 26A)<br/> (TP2 is connected to TP3 via 10k Ohm resistor R1)<br/> TP3: +3V Battery<br/> TP4: GND</p> <p>!!! WARNING: On first picture pogo pin is placed on wrong test-point. Supply +3V on TP3 will keep you SRAM powered but will damaged your already nearly depleted coin cell !!!</p> <p>Minimal circuit for correct use is to supply +3V between TP1 (+VCC) and TP4 (GND), which could be achieve by soldering a CR1616 between 2 pogo.<br/> A proper circuit would use a battery holder (there is enough room for 2 AA cell for exemple) and eventually use feedback from TP2 to shine a led to inform of correct pogo-pin contact.</p> <p>Designed for 1.5mm diam pogo-pin, but it would accept any size with a little drill help.</p> <p>Future improvement would be the add of something to apply pressure to the pcb to maintain it on the pogo. Ideally a clamp with a spring for easy remove.</p> <p>Circuit schematics are available here thanks to Jeff Frohwein's work :<br/> <a href="http://www.devrs.com/gb/files/hardware.html">http://www.devrs.com/gb/files/hardware.html</a><br/> <a href="http://www.devrs.com/gb/files/mbc1.gif">http://www.devrs.com/gb/files/mbc1.gif</a><br/> <a href="http://www.devrs.com/gb/files/134a.gif">http://www.devrs.com/gb/files/134a.gif</a></p> <h3>Print instructions</h3><h3>Category: Electronics Summary</h3> <p>An overkilled Game-Boy Cartridge holder to keep SRAM powered during a battery replacement and thus keeping your precious saves.</p> <p>Taking use of Test-Point at the back of cartridge PCB.<br/> TP1 : RawPower -&gt; Direct connection to SRAM's +VCC<br/> TP2 : +3V pin of Battery/GB power manager µC (ref 134A or 26A)<br/> (TP2 is connected to TP3 via 10k Ohm resistor R1)<br/> TP3: +3V Battery<br/> TP4: GND</p> <p>!!! WARNING: On first picture pogo pin is placed on wrong test-point. Supply +3V on TP3 will keep you SRAM powered but will damaged your already nearly depleted coin cell !!!</p> <p>Minimal circuit for correct use is to supply +3V between TP1 (+VCC) and TP4 (GND), which could be achieve by soldering a CR1616 between 2 pogo.<br/> A proper circuit would use a battery holder (there is enough room for 2 AA cell for exemple) and eventually use feedback from TP2 to shine a led to inform of correct pogo-pin contact.</p> <p>Designed for 1.5mm diam pogo-pin, but it would accept any size with a little drill help.</p> <p>Future improvement would be the add of something to apply pressure to the pcb to maintain it on the pogo. Ideally a clamp with a spring for easy remove.</p> <p>Circuit schematics are available here thanks to Jeff Frohwein's work :<br/> <a href="http://www.devrs.com/gb/files/hardware.html">http://www.devrs.com/gb/files/hardware.html</a><br/> <a href="http://www.devrs.com/gb/files/mbc1.gif">http://www.devrs.com/gb/files/mbc1.gif</a><br/> <a href="http://www.devrs.com/gb/files/134a.gif">http://www.devrs.com/gb/files/134a.gif</a></p> <h3> Print Settings</h3> <p><strong>Printer:</strong></p> <p>i3 chinese clone</p> <p><p class="detail-setting rafts"><strong>Rafts: </strong> <div><p>No</p>&lt;/div&gt;<strong>Supports:</strong></div></p> <p>No</p> <p><p class="detail-setting resolution"><strong>Resolution: </strong> <div><p>0.25</p>&lt;/div&gt;<strong>Infill:</strong></div></p> <p>10%</p> <p><strong>Filament:</strong> BasicFill PLA Sylver <br/> <p class="detail-setting notes"><strong>Notes: </strong> </p><div><p>Depending of your printer a brim of 2mm might be a plus to avoid any wrapping.</p></div></p></p></p>