Andy Collinson Description This is a replacement power source for 1.3V mercury cells or other small batteries. It has many uses and I use this circuit in my computer to power a front panel multi adapter which has a digital thermometer. Notes This ...
.. T1 is a transformer that monitors the electric supply. It is rectified by a bridge rectifier and smoothed by C2 giving a 15 Volt DC supply. The 15V supply is the input to the LM317 regulator. The regulator output is set by R1 and R7 to about ...
.. in the inductor. The circuit is built around a quad low noise FET input op-amp, type TL084. Power supply is a single 9 Volt battery, the supply being divided by R5 and R6. C1 and C2 help smooth variations in battery voltage, S1 is the on ...
.. voltage settings than the battery you have connected. I would recommend monitoring voltage and current via the PC or with a volt-ammeter to be sure. My Smart Battery reports back a Max Charge Current of 0 if the voltage is above the max ...
.. shows the lowest 4 digits. Button #1 switches to the next higher 4 digits while held down. Button #2 resets the count. VoLt Voltmeter The voltmeter uses the power going into the probe as a voltage reference. The current implementation ...
.. moment too much current is flowing biases Q1 and drops the output voltage. The output voltage is: 1.2 × (P1+R2+R3)/R3 volt. Current limiting kicks in when the current is about 0.6/R1 amp. For a 6-volt battery which requires ...
.. Fareed Description Except for use as a normal Battery Charger, this circuit is perfect to 'constant-charge' a 12-Volt Lead-Acid Battery, like the one in your flight box, and keep it in optimum charged condition. This circuit is not ...
.. Mohankumar Here is an Energy saving battery charger. It harvests solar energy to replenish 12 volt Inverter battery. It has auto cut off facility to stop charging when the battery attains full charge. The charger ...
.. N0UK, G4JEC I can't believe I never thought of this before! This simple modification is applicable to pretty much any 12 volt operated, positive earth equipment. It was described to me yesterday by Bruce, W9FZ, as a method that many ...