Tuesday, April 26, 2011

Battery Monitor - Revisited

After my initial try with the battery monitor, I wasn't too happy as it wasn't simple enough to use. The original circuit need to be switched on and off in order to avoid draining the battery.

Here comes version 2. The LED will only come on when the voltage drops below the set threshold. While connected to the battery in the 'LED OFF' state, the circuit will draw less than 1mA which is likely to be much lower than the LiPo self-discharging current... As such, the circuit can be connected to the battery indefinitely... the LED will only comes on if the voltage drops below the set threshold. The photo above show the old circuit and the new one (which is SMD).

Monday, April 4, 2011

Rechargeable batteries... I'm not a salesman...

In today's modern age, one cannot run away from buying and buying and buying batteries for all the nice gadgets we have... I've been on that route... Since last 1 year, I've been using the Sanyo Eneloop Rechargeable NiMH battery for my camera's flash and I'm very pleased with it so I'd like to share that knowledge with my friend...

Eneloop battery are regular NiMH battery but can retain it charge for a much longer time compared to standard NiMH batteries... After 1 year, it is supposed to retain about 85% of it charge! No more 'oops, forgot to charge the batteries excuses'... Of course, it's a bit more expensive though... :)

Read a detailed review and test of the battery here for more details...

p/s: I'm not a Sanyo staff :-)