AA/AAA discharge/charge
1.2 V NiCd and NiMH batteries

First posted
Thursday December 20, 2012 07:09
Updated
Thursday December 20, 2012 12:53

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Thursday December 20, 2012 08:53

9 V NiMH discharge initial focus transitions into solar light discharge, then solar and grid charging.

Discharge of NiMH using 98025 digital multimeter took too long so we were forced to use a 422 Ohn resistor.

Use of existing equipment is advisable.

For AA/AAA battery discharge solar lights to be used.

James is a scorpion silhouette.

James was illuminated at night by two white LEDs from a Harbor Freight One Stop two LED NICd solar fence light.

James' lights stopped working.

James lights removed, brought to electronics bench, and T44 test points wired.

James light started working again!!!



1.27 V is IR drop across LED seen on static pad.

James lights likly to be used to discharge AA batteries in preparation for grid and solar charge experiments.

Discharge tests of AA Batteries, Alkaline and NiMH.


Thursday December 20, 2012 12:53

Harbor Freight 7 FUNCTION DIFITAL MULTIMETER Model 69069



Test should read at least 4 if battery full.

NiMH or NiCd were always less than 4.

Harbor Freigh NiMH 2200 mAh





Harbor Fright 1.2 V 700 mAh NiCd [not full]






Harbor Freight 1.5 V Alakline

















Thursday December 20, 2012 10:43

'Bright" idea to hook-up LED

 

with droping resistor and 1.2 V NiMH conceived.

That a James white LED.

Green LED is from our LED supply box.

Googling 'LED cathode identification' reveal that the short lead should be the cathode. Not on the gree LED. It is the long lead.

10 mA droping resistor made and resistor connected. No light.

Hmm?

9 V battery 10 mA system connected Light!

LEDs 101 read.

Powering a white LED with a 1.2 NiCd appears complicated. But that's why we are studying what the One Stop engineers did.

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