Olympus OM-D BLN-1 Dummy Battery

thingiverse

This is an adapter for Olympus cameras using the BLN-1 battery. Compatible models include the OM-D E-M5, E-M5ii, and E-M1, as well as the PEN E-P5. The new PEN F may also use this battery. This allows users to power their cameras with a simple DC adapter or battery pack, which is useful for long-running time lapse shots or studio environments where AC power is more convenient. To avoid the cost of custom-made PCBs, I used 1/4" crimpable quick connectors as contacts. These have been tested in all three camera bodies and work well. I added an .stl file with both parts together for cheaper printing through Shapeways. Printer Settings: * Printer: Folger Tech Kossel * Rafts: No * Supports: No * Resolution: 0.2 mm * Infill: 10% * Notes: I use a 4mm brim to prevent peeling and warping. The files are designed to the battery and cameras, not my printer. Post-Printing: Building the Adapter To assemble the adapter, peel the brim from the parts and gather the necessary components: * 2x 1/4" crimp on spade connectors * Short length of 2-conductor wire with a lead (I used a barrel connector) * Glue compatible with the printed plastic * Wire strippers/crimpers Other optional materials include a connector for the cable end and a battery pack or AC adapter providing 7.6-8.4VDC. Insert the cable end through the entry hole in the dummy battery, then bend the connectors to fold back towards the fitting. Strip the wire ends and crimp on the connectors. Insert the spades into the slots, ensuring positive and negative polarity are correct. Grasp the connectors with pliers to insert them tightly. Situate the wires inside the housing and add a few dabs of silicone for extra security. If desired, wrap a zip tie around the cable for strain relief. Test the dummy in your camera before sealing it up, checking that the polarity is correct from the power source to the dummy. Install it in the camera, connect it to the power source, and turn on the camera. If it works, proceed with assembly. Apply a small bead of glue to the lid and squeeze it into place once you're sure it fits well. Let the glue cure completely before testing. You now have a dummy battery that can be used for time lapse shots or studio environments.