Hi!
I built myself a DIY light system using the Sigma Mirage Evo X 10W, 6V MR11 halogen light with a 4.5Ah battery made with 6 D size NiCd cells working at 7.2 volts - so I am overvolting the light by 20%.
Sigma light housing has some electronics in it so that you can switch it to 50% power and it really draws 50% less current.
What I need though is a voltage regulator that does not have to have any indicators, any switches (I have one on the light), and no power level capabilities as PWM reduced power really makes the light yellow and useless.
All it needs to do is to cut the voltage of the freshly charged battery pack from 8.5V volts or so (freshly charged NiCd cell is 1.47V, times 6 cells) to 7.2V and I need the regulator to disconnect the battery when it reaches 6 volts to prevent overdischarge.
So it needs to limit the voltage to 7.2V if batt voltage is higher, when it reaches 7.2V just let it through (no pwm) and shut off at 6V. I have looked at the LVR, but it does not have the specs that suit me (I use 6v bulb @ 7.2v and a 7.2V battery).
I know of the LVR1,2,3 regulators, Lightbrain DIY ones and the od LBrain ones from http://www.geocities.com/sunsetstrip/concert/2301/basic.html. I like the old LB ones because it uses the PIC16F84 I can get in Croatia, but it is made for 20W, and 12V systems only. LVR does not offer my specs, and Lightbrain DIY could be sized for me - but I cannot find a hexfet nor the microprocessor in Croatia, plus I don't need the soft start option and power levels nor the on off switch on the regulator!
I am not huge into electronics, and I would like to order something reasonably priced from the USA (friends can bring it for me), but if not available, I would really appreciate the help with how to build one and where to order the electronics from the USA. Sorry for the longer explanation and I hope some of you wizzards might be able to help me
Greetings from Croatia
Domi
P.S. a bonus question - I recently tried to discharge my brand new battery pack mentioned above with a halogen bulb, and forgot about it until the bulb stopped shining and the voltage of the pack fell to 4V
((((((((((( I recharged it but it would only go to 8.3V. Have I permanently damaged the battery pack by this overdischarge? It was connected to a 12V 20W MR16 halogen for maybe one hour, not more? Please tell me it is OK as my system is brand new 
I built myself a DIY light system using the Sigma Mirage Evo X 10W, 6V MR11 halogen light with a 4.5Ah battery made with 6 D size NiCd cells working at 7.2 volts - so I am overvolting the light by 20%.
Sigma light housing has some electronics in it so that you can switch it to 50% power and it really draws 50% less current.
What I need though is a voltage regulator that does not have to have any indicators, any switches (I have one on the light), and no power level capabilities as PWM reduced power really makes the light yellow and useless.
All it needs to do is to cut the voltage of the freshly charged battery pack from 8.5V volts or so (freshly charged NiCd cell is 1.47V, times 6 cells) to 7.2V and I need the regulator to disconnect the battery when it reaches 6 volts to prevent overdischarge.
So it needs to limit the voltage to 7.2V if batt voltage is higher, when it reaches 7.2V just let it through (no pwm) and shut off at 6V. I have looked at the LVR, but it does not have the specs that suit me (I use 6v bulb @ 7.2v and a 7.2V battery).
I know of the LVR1,2,3 regulators, Lightbrain DIY ones and the od LBrain ones from http://www.geocities.com/sunsetstrip/concert/2301/basic.html. I like the old LB ones because it uses the PIC16F84 I can get in Croatia, but it is made for 20W, and 12V systems only. LVR does not offer my specs, and Lightbrain DIY could be sized for me - but I cannot find a hexfet nor the microprocessor in Croatia, plus I don't need the soft start option and power levels nor the on off switch on the regulator!
I am not huge into electronics, and I would like to order something reasonably priced from the USA (friends can bring it for me), but if not available, I would really appreciate the help with how to build one and where to order the electronics from the USA. Sorry for the longer explanation and I hope some of you wizzards might be able to help me
Greetings from Croatia
Domi
P.S. a bonus question - I recently tried to discharge my brand new battery pack mentioned above with a halogen bulb, and forgot about it until the bulb stopped shining and the voltage of the pack fell to 4V