DHT11 Temp & Humidity Sensor icon DHT11 Temp & Humidity Sensor — Read DHT11 temperature and humidity on Arduino (signal pin 4) using EZ-Genuino_DTH11_Uno firmware; exposes $Temp and $Humid variables. Try it →

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#1  

That H-Bridge uses an L298N chipset. If you have a look in the datasheet you can see that the maximum is 46-50 Volts. Your battery pack will work fine.

#2  

Yup those battery's are very strong if they aren't old. They will provide plenty of juice for your motors. You can use the pwm slider to lower the "power" going to the motors to control their speed. - Josh S