Barbra Posted January 10, 2017 Report Share Posted January 10, 2017 I want to charge a LiPo battery via the ballance plugs. So it's a ballanced charge, and I don't run into any problems, day in and day out.The light can be very small, but I want it to be bright. So even using a couple LEDs would make a really nice and bright mailbox light.I want the light to last all night long. So that means I need to know the current draw of the LEDs to the capacity of the LiPo batteries.etc.I need help on this. I need help with the fact how to use an Op Amp to shut the light off when it's daylight out.. or a specific amount of light is sensed.Light Sensed : Start charging, and turn off the LED lights.Light Sensed : Set the Op Amp to detect 4.2vdc. When it does, shut down the charging, &LED's stay off until darkness is detected.That's my idea of a mailbox light, with very long battery life, and high current solar charging abilities.Can anyone help me with this kind of circuit? Here is where my LED come from http://www.kynix.com/Search/led.html Quote Link to comment Share on other sites More sharing options...
HarryA Posted January 11, 2017 Report Share Posted January 11, 2017 http://www.talkingelectronics.com/projects/SolarLight/SolarCharger-2.html Barbra 1 Quote Link to comment Share on other sites More sharing options...
Externet Posted January 11, 2017 Report Share Posted January 11, 2017 Drill a hole on top of the mailbox and insert a ----> Without its pole. Optional, add a door switch for the LED. Done fast for $1. Some silicone sealant may help. Barbra 1 Quote Link to comment Share on other sites More sharing options...
audioguru Posted January 11, 2017 Report Share Posted January 11, 2017 The cheap Chinese solar garden light has a dim light for only a couple of hours following a sunny day. It lasts only a couple of months before its LED, solar panel and battery rust away. No light following a cloudy day. The cheap solar panel actually gets sunburned. Use the pcb circuit from a solar garden light and amplify its output with a transistor to drive a bright high current LED. Use a larger high current high quality solar panel and battery. Properly seal everything to prevent rust. Quote Link to comment Share on other sites More sharing options...
Barbra Posted January 19, 2017 Author Report Share Posted January 19, 2017 On 2017/1/12 at 1:28 AM, audioguru said: The cheap Chinese solar garden light has a dim light for only a couple of hours following a sunny day. It lasts only a couple of months before its LED, solar panel and battery rust away. No light following a cloudy day. The cheap solar panel actually gets sunburned. Use the pcb circuit from a solar garden light and amplify its output with a transistor to drive a bright high current LED. Use a larger high current high quality solar panel and battery. Properly seal everything to prevent rust. yaaas, many chinese solar garden light do have a dim light and last not long. And i will try your way to make a brighter led, thanks man. On 2017/1/12 at 1:13 AM, Externet said: Drill a hole on top of the mailbox and insert a ----> Without its pole. Optional, add a door switch for the LED. Done fast for $1. Some silicone sealant may help. could really be helpful, though my eyes were indeed caught by you Gif-avatar, hahaha Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.