Recent content by arhanghel

How do I set to flash once every 10 seconds and stay on 5 seconds? And if I want to use more LEDs, I need to use and to program a microcontroller?

The LED need to light up an area of ground, I don't want to be seen form some distance. Just to light up an area. The led will be placed 30cm from ground. A garden solar light maybe it will be ok (i have not had the chance to see so many. In order to get an opinion about a garden solar...

Yes I want to light the LED for the entire 12 or so hours that the sky is dark. But I can diversify the methods of making the tests, so I thought of a blinking LED (but as in the first case, it should start blinking when the night falls). Any idea how I can do the circuit without using a...

@CWatters: Yes, I'm a little disappointed. Any idea how I could make the circuit work more with a 9V battery? Maybe another circuit ? P.S: Data sheet for LDR: http://www.farnell.com/datasheets/612931.pdf P.S2: Any idea if I can use a 18V battery or bigger whit the same circuit (maybe it...

@NascentOxygen: No is not a home work exercise, I'm trying to make a circuit that when the night comes to light an LED (I want to help my brother who is a biologist and needs something like this to do some tests in the open field). The current is I=9V/((R1||R2)||R4)) (i think so ). The...

Hello, I have this circuit: And I'm using this battery: http://www.tme.eu/en/details/bat-6f22_gp/batteries/gp/gp-1604g/# How long will the battery keep supplying the circuit? Thanks !