| LVR2 | Original LVR (LVR1) |
| 3 to 15 volt operation (LVR2)
3 to 36 volt operation (LVR2X) |
5 to 8 volt operation, mods for 12 & 18 |
| 3.0 to 1 input voltage range with 2% regulation | 1.3 to 1 input voltage range with 2 % regulation |
| Over voltage protection by diming lamp | Over voltage caused lamp burn out |
| Bulb dim up during power on greatly extends bulb life. | Same |
| Auto bulb sensing turns on and off regulator. | Seperate switch is only way to turn on and off. |
| Warning flashing when at end of battery life | No warning |
| Less than 1 milliwatt idle loss (5 volts in) | 10 to 50 milliwatts idle loss |
| Power efficiency above 99% to over 99.8% | Power efficiency 97% to over 99% |
| SMD PCB which is much smaller 0.64 x 1.3 inches
LVR2X PCB 1.4 x 2.65 inches |
Printed Circuit Board 1.0 x 1.7 inches |
This product was developed in 1993 and the PCB's, kits, and A&T units are no longer available from me but the documentation is useful for those wanting to build or repair an old unit. The documentation is a bit of a mess at the so if you can't find the answer, just Email me willie@cs.indiana.edu.