Hello all,
I'm new to this forums and also new to electronics and I came here to ask for your help on a project of mine. I've never been too much into electronics (still remember some stuff from school years back) and I'd like to learn more about it now.
I wanted to build a small system with a rechargeable battery and a solar panel which would charge the battery during the day and turn on a led during the night.
Since small solar cells and rechargeable "coin like" batteries are damn hard to find around here, I ordered some "solar key chain flashlight" from China.
When they arrived, I opened them and found out it had a good part of my project already done. It consisted in a circuit with 3 parallel LEDs connected to the battery, a switch (between the battery and the LEDs) and the solar cell connected to the battery.
Since my project doesn't include switches, but sunlight incidence, I removed the switch and tied up both "open ends". This made the LEDs stay turned on forever. For the sake of battery saving, I removed 2 of them.
Then, I searched the internet about photoresistors and came up across "LDRs". After studying its mechanics, I ended welding a 5mm one in parallel with the remaining LED, to make the LDR's resistance grow up in the dark and let the current pass through the LED.
It should have worked, but it is not... any clue about something I may be missing here?
Here's a schematic I made:
**broken link removed**
(yeah, I don't really know how to do this, it's just for clarifying purposes)
Thank you for you attention!
P.s.: excuse me for my english! (portuguese speaker here xD)
I'm new to this forums and also new to electronics and I came here to ask for your help on a project of mine. I've never been too much into electronics (still remember some stuff from school years back) and I'd like to learn more about it now.
I wanted to build a small system with a rechargeable battery and a solar panel which would charge the battery during the day and turn on a led during the night.
Since small solar cells and rechargeable "coin like" batteries are damn hard to find around here, I ordered some "solar key chain flashlight" from China.
When they arrived, I opened them and found out it had a good part of my project already done. It consisted in a circuit with 3 parallel LEDs connected to the battery, a switch (between the battery and the LEDs) and the solar cell connected to the battery.
Since my project doesn't include switches, but sunlight incidence, I removed the switch and tied up both "open ends". This made the LEDs stay turned on forever. For the sake of battery saving, I removed 2 of them.
Then, I searched the internet about photoresistors and came up across "LDRs". After studying its mechanics, I ended welding a 5mm one in parallel with the remaining LED, to make the LDR's resistance grow up in the dark and let the current pass through the LED.
It should have worked, but it is not... any clue about something I may be missing here?
Here's a schematic I made:
**broken link removed**
(yeah, I don't really know how to do this, it's just for clarifying purposes)
Thank you for you attention!
P.s.: excuse me for my english! (portuguese speaker here xD)