Tamiya 72005 6-Speed Gearbox Kit Shipping:2-4 Weeks and features the industry standard

and features the industry standard 20- 4mA output where 20mA is minimum range and 4mA is maximum range

The energy of solar panel will be particularly efficient when paired with the DFRobot solar power management board

ISO 15693 and ISO 18000-3 mode 1 compatible

Here is an example of reading the inputs on a PCF8574 I/O expander:

Tamiya 72005 6-Speed Gearbox Kit Shipping:2-4 Weeks and features the industry standardThis versatile, high efficiency gearbox lets you build one of the following gear ratios: 11. 6: 1, 29. 8: 1, 76. 5: 1, 196. 7: 1, 505. 9: 1, and 1300. 9: 1. Whatever your application, chances are that one of the configurations will do the job. The Tamiya 72005 6 speed gearbox is a versatile, high efficiency gearbox that you can build in one of the following gear ratios: 11. 6: 1, 29. 8: 1, 76. 5: 1, 196. 7: 1, 505. 9: 1, and 1300. 9: 1. Whatever your