Olympus E510 dummy battery BLM-01

thingiverse

**Update: works :-)** mechanical --------------------- This model should fit Olympus E510 DSLR camera. - Electrical contacts: 6.4mm wide cable lugs (blue color code) should fit (" Push On Blue Male 6.4mm"). - 8mm barrel plug should screw in. - 3.5mm cable hole should fit a second cable (in my case to power a 2nd/external screen). Printed on Prusa i3 mk2 in PLA (trasparent, cheapest from ebay). Designed in OpenSCAD. electrical --------------------- The camera expects two Lithium-Ion cells in series, so 7.2V (3-4.2V *2 = 6 - 8.4V). There is space inside this adapter for a voltage regulator (linear or switching) so the whole thing can be supplied by a 12V wall wart. I put in a LM317 linear voltage regulator with voltage set to 7.0V. Decoupling caps are 4.7uF/50V and 100nF ceramic at input. With 12V input and 0.5A load temperature is still within acceptable range (regulator can be touched without ouch). Peak power consumption up to 2A works without problem (2.2A is typical current limiting point). e510 is defined with 1.6Ah is enough for 650 images (according to CIPA), this means 1600mAh/650 = 2,5mAh per picture. One picture every 30 seconds --> 5,4h with 1600mAh --> 300mA average current consumption. **Don't destroy your camera with incorrect voltage, polarity, surges/spikes etc. !!!** (or at least do not blame me ;) **Updates:** - design finished, print started? Yes! (4.3.2018 9:30 AM) - Fits in Olympus e510 mechanically? Yes! (4.3.2018, 11:30 AM) - Electrical contacts fit? Yes! (4.3.2018, 11:40 AM) - Circuit board fits? Yes! (4.3.2018, 7:30 PM) - barrel connector fits? --> hole tiny bit too small (but needs individual adaption depending on type anyway) (8.3.2018, 5:30 PM) - camera works / not fried? --> Yes! But camera shows "low battery" at 7V (circuit needs to be adjusted to 7.4V); At 7.39V, it works :-) (18.3.2018, 8:40 PM)