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| [title] Know your facts | |
| - | [* black] I took some measurements so you don't have to. Here are the facts: |
| + | [* black] For the electronics enthusiasts, I took some measurements so you don't have to. Here are the facts: |
| [* black] ***12v rail voltage:*** The 12v regulator will read close to 12v at the input, and close to 10.6v at the output. This is OK for the drive. You will compensate for the slight drop in speed with the trim pot adjustment. | |
| [* black] ***5v rail voltage:*** The 5v regulator will read close to 11.2v at the input and 5.0v at the output. This is OK and the stock heat dissipator will take care of the heat. | |
| [* black] ***Temperature***: At 22°C ambient temp and after 20 minutes of operation, the 12v regulator reads 40°C and the 5v regulator reads 47°C . This is all well within operating range. | |
| - | [* black] ***Current: ***After switching on, current reads 630mA (to feed all the electronics circuits and the chips). When the motor is spinning, the total current reads 1,170mA (~1.2 Amps). |
| - | [* black] This current reading means that nominal 12v and 2A or 2.5A will be powerful enough of a power supply. If you only have a 1500mA power supply, no worries: you should be fine as well, but with 2000mA your drive and your power supply will be all happy and ready for play time. |
| + | [* black] ***Current: ***After switching on, the current drawn from the new power supply reads 630mA (which is normal to feed all the electronics circuits and the chips). When the motor is spinning, the total current reads 1,170mA (~1.2 Amps). |
| + | [* black] This current reading means that any nominal 12v/2A or 2.5A DC power supply will be powerful enough. If you only have a 1500mA power supply, no worries: you should be fine as well, but in this case higher is better. |
| + | [* black] Measuring equipment used: Fluke 87V multimeter, Rigol DS 1054Z scope, HTI thermal camera. |