Shop OBEX P1 Docs P2 Docs Learn Events
Charging a 1.2V NiMH battery — Parallax Forums

Charging a 1.2V NiMH battery

DummyDummy Posts: 2
edited 2008-03-10 21:21 in BASIC Stamp
Hi,

I would like to write a code using BS2 to monitor the battery voltage. Whenever it charge to the max level (1.5V), then I will cut it off.· I'm a new user....any idea is very appreicated.

thanks
·

Comments

  • Mike GreenMike Green Posts: 23,101
    edited 2008-03-10 17:03
    Look at EME Systems' website (www.emesystems.com). There is an example of using RCTIME to measure a Stamp's own battery voltage that can be adapted for your use. It's under "app-notes" in the section on the RCTIME statement.
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-03-10 17:16
    This thread is being moved from the Completed Projects Forum to the BASIC Stamp Forum.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Chris Savage
    Parallax Tech Support
  • MSDTechMSDTech Posts: 342
    edited 2008-03-10 20:00
    You should look through the document: http://www.hardingenergy.com/pdfs/NiMH.pdf
    It describes the characteristics of NiMH batteries and the factors to consider when charging them. Not only should you monitor the batteries voltage, you also need to monitor the temperature change as the battery is charging.
  • DummyDummy Posts: 2
    edited 2008-03-10 21:05
    How do you monitor the battery temperature while charging the battery?· Please advise.· Thanks
  • Mike GreenMike Green Posts: 23,101
    edited 2008-03-10 21:21
    There are all sorts of temperature sensors that can be used with a Stamp ... your choice. The main thing is to thermally couple the sensor to the battery pack so the sensor temperature is a good guide to the battery pack temperature. The LM34 and DS1620 are both sold by Parallax and have lots of examples in the Parallax tutorials and Nuts and Volts columns.
Sign In or Register to comment.