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  • Easy Nicad to Li Po Drill Conversion

    Thanks Tomjasz for the kind words:I wasn't trying to diss the presenter but felt I had to point out the additional steps that a novice should be aware of in order to have a safe conversion.I've converted a few of my old drills several years ago and am very happy with how they perform now. Even so, I still don't leave them alone while they charge...just to be cautiously safe.

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  • Easy Nicad to Li Po Drill Conversion

    Your idea is good BUT, you will be causing problems or fire if you don't add a couple of additional details.Modern Li ion battery drills have built in protection circuits to cut the drill off when the Li ion batteries drop to a pre-determined voltage level. This is to protect the battery cell voltage from dropping too low and destroying it. Thus you need to add a protection circuit into the mix. A lipo low battery circuit will alert you when the batteries are reaching the critical low voltage level and let you know it's time to stop using the drill and recharge it. Here is an example of what I've used in the past for my conversions...http://www.ebay.com/itm/New-2in1-Li-ion-Lipo-Batte...A good instructable done by DIY Perks shows how to incorporate this...HOWEVER, even he didn't discuss ...

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    Your idea is good BUT, you will be causing problems or fire if you don't add a couple of additional details.Modern Li ion battery drills have built in protection circuits to cut the drill off when the Li ion batteries drop to a pre-determined voltage level. This is to protect the battery cell voltage from dropping too low and destroying it. Thus you need to add a protection circuit into the mix. A lipo low battery circuit will alert you when the batteries are reaching the critical low voltage level and let you know it's time to stop using the drill and recharge it. Here is an example of what I've used in the past for my conversions...http://www.ebay.com/itm/New-2in1-Li-ion-Lipo-Batte...A good instructable done by DIY Perks shows how to incorporate this...HOWEVER, even he didn't discuss the need to balance charge the batteries once you have added this protection circuit. For that, you should look at this youtube video (there are many others) on how to add the balancing circuit to the battery pack to keep you and your drill safe.When charging the batteries you need to make sure that you are not over charging them. This is not a good thing! Some Li-ion batteries in a battery pack will charge more quickly than the others. With full power going to all the batteries, this could damage the battery that is already at peak voltage (or could cause a more serious issue, like fire). For this reason, you should also build into the battery pack the ability to balance the batteries as they are being charged. The charger you are showing in your example has the capabilities of balance charging and cutting charging power to those batteries in the pack that gets to full capacity. But you must also include balance charging contacts.Li-ion batteries are great if used properly but can be quite dangerous if you are not handling them or charging them properly. My advice is that for anyone interested in doing this conversion, PLEASE do more research online on the proper way to do the above steps to ensure proper and safe use of Li-ion batteries. This is no joke and should not be taken lightly. Good luck to all.

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  • big dawg1 commented on Make Everything's instructable How To: Miter Saw Shadow Line2 years ago
    How To: Miter Saw Shadow Line

    It's a great idea, however, my 3 saws have blade guards that are much closer to the housing than your Bosch so I'm afraid this will not work for many saws.

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  • big dawg1 completed the lesson Welding Joints in the class Welding Class2 years ago
  • big dawg1 commented on deba168's instructable DIY Solar Powered Mason Jar3 years ago
    DIY Solar Powered  Mason Jar

    Nice ible.If the battery is fully charged, approximately how long will the light shine?

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