bluehash 1,581 Posted April 11, 2013 Share Posted April 11, 2013 43oh Store Link 43oh Doc/Wiki Link This is a LiPo BoosterPack I have been working during my downtime . I named it Booster since it is a power pack ;-) This should be perfect for wireless projects or for those times you need to be away from a PC. First, features: * USB connector for charging * Sits over the MSP430 Launchpad and below the Stellaris/C2000 Launchpad with pass-through(excluding inner row for C2000/Stellaris) for all pins including power. * Switch to turn power on/off when in battery mode. When shutdown via a switch, power consumption by the LDO is 0.1uA typical. * Charges LiPo battery to 4.2V. Support for one cell. * Onboard LDO Microchip MCP1252. Provides 3.3V, 120mA output. * Lipo charger is based around Microchip MCP73831 * Charge status LED * Spans the length of the Launchpad to accommodate different LiPo battery sizes. The battery needs to be charged through the Booster's USB connector, as there is no way I can pass 5v from the Launchpad to the Booster board. The battery does charge when the usb connector is plugged in. I tested it using the OLED board when connected to the USB port. Also, stacking headers are used for stacking boosterpacks. I'm having trouble with the charge status LED. It still remains on when the battery reaches 4.2v... still some debugging to do. I have 8 PCBs which I can give away at cost in a GB. If anyone is interested , let me know. I have a few extra batteries too. Battery vendors: Any 3.7v LiPo should work. Syma S107 3.7V, 240mA 43oh_BP_Booster.pdf Philipp, Tribes, Rickta59 and 5 others 8 Quote Link to post Share on other sites
cubeberg 540 Posted April 11, 2013 Share Posted April 11, 2013 Good stuff Nice to see that you've been able to get back into making a BP. Is there protection built-in so that it doesn't go below the recommended voltage for the LiPo? I'd be in for a GB - probably 2 depending on cost. Quote Link to post Share on other sites
bluehash 1,581 Posted April 11, 2013 Author Share Posted April 11, 2013 Good stuff Nice to see that you've been able to get back into making a BP. Is there protection built-in so that it doesn't go below the recommended voltage for the LiPo? I'd be in for a GB - probably 2 depending on cost. Thanks! The MCP73831 has a under voltage lockout circuit. So it should protect it from a complete discharge. Will update on price tomorrow. Quote Link to post Share on other sites
PTB 27 Posted April 11, 2013 Share Posted April 11, 2013 Hi bluehash, If you have a spare and a battery, I would be definitely interested. Been wishing for something like this for a while. If there is big demand I am happy to wait till it appears in store. THANKS PTB Quote Link to post Share on other sites
roadrunner84 466 Posted April 11, 2013 Share Posted April 11, 2013 Looking good! But * Switch to turn power on/off when in battery mode. Shutdown power 2uA what do you mean with Shutdown power? Because 2uA seems like a lot. Is this the power drawn from the battery when the launchpad is off? Is it the current at which the regulator shuts down? Quote Link to post Share on other sites
spirilis 1,265 Posted April 11, 2013 Share Posted April 11, 2013 Sounds like the DC-DC converter (MCP1252) claims to use 0.1uA in shutdown mode, maybe 2uA is the outlying maximum. That's where the switch is attached. Quote Link to post Share on other sites
bluehash 1,581 Posted April 11, 2013 Author Share Posted April 11, 2013 Looking good! But what do you mean with Shutdown power? Because 2uA seems like a lot. Is this the power drawn from the battery when the launchpad is off? Is it the current at which the regulator shuts down? Sounds like the DC-DC converter (MCP1252) claims to use 0.1uA in shutdown mode, maybe 2uA is the outlying maximum. That's where the switch is attached. Yes.. what spirilis said. max 2uA. 0.1uA typical. Fixed in main post. Quote Link to post Share on other sites
bluehash 1,581 Posted April 11, 2013 Author Share Posted April 11, 2013 Hi bluehash, If you have a spare and a battery, I would be definitely interested. Been wishing for something like this for a while. If there is big demand I am happy to wait till it appears in store. THANKS PTB Subscribe to this thread. I'll post when I'm ready to put them up for a gb. PTB 1 Quote Link to post Share on other sites
floridadrummer 1 Posted April 11, 2013 Share Posted April 11, 2013 I'd definitely be in for the group buy. This looks awesome! Quote Link to post Share on other sites
bluehash 1,581 Posted April 12, 2013 Author Share Posted April 12, 2013 Ok.. almost ready. Also, @@CorB, @@gwdeveloper, @@spirilis, @@antennahead will be sent one Booster Booster for their work on wireless radios in this forum. This could be handy for their radio projects. They are the Radiohead awardees. Thanks for your contributions. Could you guys comment below if you would like one. The others who replied above are still in line. cubeberg 1 Quote Link to post Share on other sites
spirilis 1,265 Posted April 12, 2013 Share Posted April 12, 2013 I'd be in for one! That sounds slick. Quote Link to post Share on other sites
GeekDoc 226 Posted April 12, 2013 Share Posted April 12, 2013 Definitely in for at least one! Sent from my Galaxy Note 2 using Tapatalk 2 Quote Link to post Share on other sites
dubnet 238 Posted April 12, 2013 Share Posted April 12, 2013 I would like one.....if I am not too late. Quote Link to post Share on other sites
bluehash 1,581 Posted April 17, 2013 Author Share Posted April 17, 2013 Good stuff Nice to see that you've been able to get back into making a BP. Is there protection built-in so that it doesn't go below the recommended voltage for the LiPo? I'd be in for a GB - probably 2 depending on cost. Hi bluehash, If you have a spare and a battery, I would be definitely interested. Been wishing for something like this for a while. If there is big demand I am happy to wait till it appears in store. THANKS PTB I'd definitely be in for the group buy. This looks awesome! Definitely in for at least one! Sent from my Galaxy Note 2 using Tapatalk 2 I would like one.....if I am not too late. Group buy here. Quote Link to post Share on other sites
JWoodrell 285 Posted April 18, 2013 Share Posted April 18, 2013 on a side note, you can generate 5v from the 3.6V VCCpin the booster pack pinout provides if you use a buck-boost regulator, I did this on my USB + SD card board to give me 5V for my LEDs on the board(change made after I posted about it) that will let you feed that up regulated 5v into the charging chip and run it solely off the booster pack pins rather than having to charge it through the separate usb plug. here is the schematic screenshot of how to rig it you can power VREG Enable from VCC for always on 5V output, or tie the enable to an output on the MSP430 and turn the 5V on and off as needed. the resistor values set the voltage out, these will give you 5V for the NCP1406 the inductor can be from 1uH to 47uH, larger gives you better performance, smaller allows smaller components, just make sure the saturation current is atleast what you expect to draw from the 5V output plus some cushion GeekDoc and bluehash 2 Quote Link to post Share on other sites
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