Re: [RCSE] Lithium Ion charging
Go to Target and buy an inverter for your car that will convert the 12v power to 120volt. Their price varies from $30 to $50. Its better to get a larger than a smaller one (i.e. avoid the 100 watt one, go for a 200 or 400w one). Martin Usher Bill Swingle wrote: OK, hypothetically here. Say I'm at the slope but my Lithium charger uses only 120V AC. So, if I wanted to be reckless (go with me here), what can be done with a Nicad charger and how? Bill Swingle RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] Lithium Ion charging
On Sat, 21 Oct 2006, Martin Usher wrote: Go to Target and buy an inverter for your car that will convert the 12v power to 120volt. Their price varies from $30 to $50. Its better to get a larger than a smaller one (i.e. avoid the 100 watt one, go for a 200 or 400w one). One must be careful with those inverters. The cheap units produce quite dirty AC (i.e. the signal is not sinus but contains lots of higher frequencies too). Impulse PSU-s (like those found in mobile phone or laptop chargers) can live with that. But if you have a PSU that contains large transformer it might cause problems because it overheats. I damaged the transformer of my charger using the cheap inverter. The transformer made chirping noices but I did not understood what's the problem before it went off. It took me more than 10 minutes to open the charger and the transformer was still too hot to touch. Fortunately only the thermo fuse inside the transformer needed replacment. Since the LiPo charging is much simpler process than NiMH charging, there is not much difference between cheap and expensive chargers. So, I would get an entry level 12V dedicated LiPo charger. regards, Arne Martin Usher Bill Swingle wrote: OK, hypothetically here. Say I'm at the slope but my Lithium charger uses only 120V AC. So, if I wanted to be reckless (go with me here), what can be done with a Nicad charger and how? Bill Swingle RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] Lithium Ion charging
On Fri, Oct 20, 2006 at 09:44:06AM -0700, Bill Swingle wrote: | OK, hypothetically here. | | Say I'm at the slope but my Lithium charger uses only 120V AC. | | So, if I wanted to be reckless (go with me here), what can be done with a | Nicad charger and how? Well, generally a charger's job is to put a certain amount of current into your battery, and a NiCd/NiMH charger does that as well as a LiPo charger. What really differs is how they turn off -- a NiCd/NiMH charger turns off when it sees a peak (or just after a certain amount of time for an old one) and a LiPo charger starts slowing down at a certain voltage, and finally stops at 4.2 volts/cell. So, if you sit there and watch your voltage as you charge your batteries very carefully, you can charge your LiPo pack with a NiCd charger. However, the charger will not turn itself off automatically, and will happily overcharge your battery if you forget to turn it off yourself -- which will ruin the battery at best, and could cause it to catch fire if you're unlucky. It's easy to get distracted and forget to watch the charger, so I'd strongly suggest not doing this. You can get a low end LiPo charger for 2-3 cells for as little as $12 (http://www.nitrorcx.com/eeclipolilib.html) if your pack has a balancing connector, and for $25 (http://www2.towerhobbies.com/cgi-bin/wti0001p?I=LXHNW5) if not. Or you can get lower power 12v-110v inverter for around $20 if you want to power your charger at the field. Considering that your battery probably costs more than these chargers, and is so easy to ruin just by getting distracted, I'd strongly suggest just getting the right charger -- Doug McLaren, [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Lithium Ion charging
OK, hypothetically here. Say I'm at the slope but my Lithium charger uses only 120V AC. So, if I wanted to be reckless (go with me here), what can be done with a Nicad charger and how? Bill Swingle RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] Lithium Ion charging
There are a few devices available now Bill that allow using a NiCD/MH charger to charge Lithium technology, check the electric forums. Simon Van Leeuwen PnP Systems - The E-Harness of Choice Radius Systems Cogito Ergo Zoom Quoting Bill Swingle [EMAIL PROTECTED]: OK, hypothetically here. Say I'm at the slope but my Lithium charger uses only 120V AC. So, if I wanted to be reckless (go with me here), what can be done with a Nicad charger and how? Bill Swingle RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] Lithium Ion charging
Hi guys, if you are looking for good accurate information on Li Poly please go to www.skysharkrc.com Mike Grey has the best batteries and chargers at the most reasonable prices. From the Skyshark Home Page click on Electric Power, read the write ups they contain allot of information then at the bottom of the page click on See Our Selection. Mike has done all the hard testing on several products and has come up with the best performing systems. Bill, you will find Li Poly balancing chargers to suite you slope flying. EW. Ed Whyte WHYTE WINGS 7207 Cornerstone Drive Caledonia, MI 49316-7879 616 698 8668 - Original Message - From: Bill Swingle [EMAIL PROTECTED] To: Simon Van Leeuwen [EMAIL PROTECTED] Cc: RCSE soaring@airage.com Sent: Friday, October 20, 2006 12:44 PM Subject: [RCSE] Lithium Ion charging OK, hypothetically here. Say I'm at the slope but my Lithium charger uses only 120V AC. So, if I wanted to be reckless (go with me here), what can be done with a Nicad charger and how? Bill Swingle RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] Lithium Ion charging
One can not put too fine a point on Doug's comments about NOT using your NiCD/MH charger on Lithium technology... Simon Van Leeuwen PnP Systems - The E-Harness of Choice Radius Systems Cogito Ergo Zoom Quoting Doug McLaren [EMAIL PROTECTED]: On Fri, Oct 20, 2006 at 09:44:06AM -0700, Bill Swingle wrote: | OK, hypothetically here. | | Say I'm at the slope but my Lithium charger uses only 120V AC. | | So, if I wanted to be reckless (go with me here), what can be done with a | Nicad charger and how? Well, generally a charger's job is to put a certain amount of current into your battery, and a NiCd/NiMH charger does that as well as a LiPo charger. What really differs is how they turn off -- a NiCd/NiMH charger turns off when it sees a peak (or just after a certain amount of time for an old one) and a LiPo charger starts slowing down at a certain voltage, and finally stops at 4.2 volts/cell. So, if you sit there and watch your voltage as you charge your batteries very carefully, you can charge your LiPo pack with a NiCd charger. However, the charger will not turn itself off automatically, and will happily overcharge your battery if you forget to turn it off yourself -- which will ruin the battery at best, and could cause it to catch fire if you're unlucky. It's easy to get distracted and forget to watch the charger, so I'd strongly suggest not doing this. You can get a low end LiPo charger for 2-3 cells for as little as $12 (http://www.nitrorcx.com/eeclipolilib.html) if your pack has a balancing connector, and for $25 (http://www2.towerhobbies.com/cgi-bin/wti0001p?I=LXHNW5) if not. Or you can get lower power 12v-110v inverter for around $20 if you want to power your charger at the field. Considering that your battery probably costs more than these chargers, and is so easy to ruin just by getting distracted, I'd strongly suggest just getting the right charger -- Doug McLaren, [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
