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Electronic Projects Design/Ideas / Re: Battery choice
« Last post by audioguru on May 28, 2015, 10:02:09 PM »
Your profile does not show where in the world (which world?) you are located. Energizer alkaline AAA, AA, C, D etc cells are popular in North America and they have very detailed datasheets on the Energizer website. I made some LED Chasers that are powered from two or four AA alkaline cells. The LEDs are very bright and the batteries last for 3 months all day and all night of continuous blinking light.
The blinking saves a lot of battery power.
Electronic Projects Design/Ideas / Re: Battery choice
« Last post by kaz2598 on May 28, 2015, 12:45:25 PM »
I am aware of that but trying to get capacity info on non rechargeable batteries is proving difficult.
I will have a look for that led, Thanks
Electronics chit chat / Power output of a transmitter.
« Last post by Dammy on May 28, 2015, 11:05:44 AM »
Is the no. of receivers that can tune to a radio broadcast in its network coverage limited to the transm. output power?
Electronic Projects Design/Ideas / Re: Battery choice
« Last post by Hero999 on May 28, 2015, 09:59:13 AM »
How long a battery lasts for doesn't just depend on its mAh rating but how much current is drawn from it and the cut-off voltage of the device.

If you want a low current LED, go for a Indium gallium nitride (InGaN) green LED which will give plenty of light below 1mA.
Electronic Projects Design/Ideas / Battery choice
« Last post by kaz2598 on May 28, 2015, 09:03:52 AM »
Hi all
Quite new to this so bear with me if i am speaking rubbish.
Is there somewhere i can look for Mah values for batteries for my project, I have put a motion sensor in a box and would like to know how long the batteries will last. Also looking for very low current Led's, i have ones with a forward current of 2ma but hoping to improve.
Thanks for any help
Mechanical constructions/Hardware / steelseries kinzu v3
« Last post by JoeCosta on May 28, 2015, 06:43:44 AM »
Hello i want to buy this mouse, but they are offer:


it's good ?
Electronic Projects Design/Ideas / Re: Light data transmissions
« Last post by Externet on May 27, 2015, 09:10:11 PM »
Light ?  500ft.?  No problem.  Use a modulated laser revolving on a very steady turntable.  Position receiver at the beam sweep path deep into a pipe to minimize daylight.

Something else?  A steady non-turning modulated gas discharge lamp on direct current will be omnidirectional 360, can be picked by properly aimed peripherial sensors.
Electronic Projects Design/Ideas / Re: Current monitor/sensor
« Last post by denci on May 27, 2015, 01:52:35 PM »
This is exactly what i want to do with this discharge circuir, i want provide slow test with 20 hours discharge rate and fast test, which give me fast, but litle bit unreliable resault of battery "healthy".
I have some problems with my circuit, at start i turn on relays but after few second no current flows through relays but relays is still turn on, no sound - click is detected unless i reset microcontroler ??? ???
It shoould be program bug or some problem with electronic. ???
Any chance you could help me out with a parts list?
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