🚀 go-pugleaf

In article <1993Jan21.084525.25298@macc.wisc.edu> jvannes@vms.macc.wisc.edu writes:
>In article <1jhvkuINNb8d@flop.ENGR.ORST.EDU>, slezal@gyro.ECE.ORST.EDU (Lee Slezak) writes...

>>I am looking for some plans to build a charger for sub-C size nicad batteries.

>I have a serious Ni-Cad fetish.  I have them in everything I own, flashlights,
>music equipment, etc.  I have a number of simple chargers based on the LM317

  Maxim recently released Max712/Max713 NiCad/NiMH 
  "Battery Fast-Charge Controllers". The ICs provide
  fast charge at rates from C/4 to 4C and C/16 trickle
  charge rate as well. 

  These devices can charge 1 to 16 series cells.
  A voltage-slope detecting ADC, a timer, and a 
  temerature window comparator determine charge 
  completion.

  Nice point #1: ICs require few external components.
  Nice point #2: Available as free samples from
  Maxim (1-800-998-8800).

  Linear Technology also produces fast-charge controllers,
  but unlike generous Maxim, samples are not available for
  universites (I was designing a HV power supply and ran
  across one LT's PS controller, called LT for a sample 
  (actually we needed a hundred of HV PSs, but still I wanted
  to test the IC before starting a production) and got
  an answer that LT's policy is not to deal with universities :(.


  So - stick with Maxim.


 S.B.