Other Parts Discussed in Thread: DRV2605L, DRV2624, DRV2624EVM-MINI, ENERGIA,
i
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i
Hi Dr Branson,
DRV2605L (&2605/2604/2624/2625) are considered dedicated haptic drivers because they will monitor the resonance frequency in real time and then drive the LRA motor at that frequency. this is ideal because it will maximize the vibration and minimize the power consumption. However if multiple LRA motors are connected to one DRV device this feature cannot work. We do not recommend multiple LRA motors on DRV26xx family. If multiple LRAs are used a cheaper higher current amplifier could be used.
My recommendation is to use 5x DRV26xx devices per hand, and a single host processor like an MSP430 Microcontroller.
- DRV2624 is the same family of device as DRV2605L, the difference is DRV2624 cannot support 2V Vdd, and it does not have the integrated waveform library, however since you are using RTP mode the function, and prototyping complexity will be the same. https://www.ti.com/tool/DRV2624EVM-MINI DRV2624EVM-MINI is a small board that is intended for haptic prototyping. each board is 1cm x 1cm so the prototype can be small.
- an MSP420 Launchpad like https://www.ti.com/tool/MSP-EXP430F5529LP can be used for the controller. these can be used for quick prototyping, and there is an IDE available which is very easy to learn called Energia https://energia.nu/ . this IDE removes much of the complexity, and is very well documented online.
- the DRV2624 has a feature called I2C broadcast mode, So all device can be written to at the same time. This can remove the I2C switches that are needed on DRV2605LEVM-MD.
Regards,
Arthur