Hi all,
I am new to this forum. Although I have been reading here a lot in the last time and found a lot of valuable information I still have some questions left.
What I plan to do is to equip my (homemade) LED-based lamps with conversion circuits to make them use up all the battery power. I want to use the same/similar circuit for all three lamps and will probably go with the ZLT+ design. The lamps use 3 AA cells which seems to make it a bit more difficult.
So before I go spending money for the parts I thought I ask the experts.
From what I understand it is
1. no good idea to run one white LED with the ZLT+ and 4,5 V
(i.e. 3 AA alkalines)?
2. a good idea to run 2 or more LEDs (Nichia 5mm ones) in
series with 3 AA alkalines ?
3. a good idea to run a 1W LS with a ZLT+ from 3 NiMHs?
The internal resistance of the batteries will reduce the
voltage to something close/below Vf. Currently, I run the
LS direct drive with a very small resistor.
4. The Zetex chip will run the batteries down to voltage of
roughly 0,8-0,9V, i.e. 0,3V per cell. Is this right? And if yes, doesn't
this very deep discharging damage the NiMH cells ???
Waiting for your comments. Thanks.
Jabba
I am new to this forum. Although I have been reading here a lot in the last time and found a lot of valuable information I still have some questions left.
What I plan to do is to equip my (homemade) LED-based lamps with conversion circuits to make them use up all the battery power. I want to use the same/similar circuit for all three lamps and will probably go with the ZLT+ design. The lamps use 3 AA cells which seems to make it a bit more difficult.
So before I go spending money for the parts I thought I ask the experts.
From what I understand it is
1. no good idea to run one white LED with the ZLT+ and 4,5 V
(i.e. 3 AA alkalines)?
2. a good idea to run 2 or more LEDs (Nichia 5mm ones) in
series with 3 AA alkalines ?
3. a good idea to run a 1W LS with a ZLT+ from 3 NiMHs?
The internal resistance of the batteries will reduce the
voltage to something close/below Vf. Currently, I run the
LS direct drive with a very small resistor.
4. The Zetex chip will run the batteries down to voltage of
roughly 0,8-0,9V, i.e. 0,3V per cell. Is this right? And if yes, doesn't
this very deep discharging damage the NiMH cells ???
Waiting for your comments. Thanks.
Jabba