.. 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 ...
.. 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 ...
.. 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 ...
.. is used as power control. For hum-free operation, operate the transmitter on a 12V rechargeable battery pack of 10 x 1.2-volt Ni-Cd cells. Transistor T2 must be mounted on a heat sink. Do not switch on the transmitter without a matching ...
.. hobby circuit of an automatic garden light using a LDR and 6V/5W solar panel. During day time, the internal rechargeable 6 Volt SLA battery receives charging current from the connected solar panel through polarity protection diode D9 and ...
.. device that can control DC devices which draw up to a few amps of current. The circuit may be used in either 12 or 24 Volt systems with only a few minor wiring changes. This device has been used to control the brightness of an ...
.. a Savonius rotor. At 200 RPM the output is only about four or five volts. While this is obviously not enough to charge a 12 volt battery by itself, a bit of clever circuitry solved the problem. Some time back a circuit was published in one of ...
.. output in just a couple of times the ground so a voltage divider (1K/470) is used to reduce the voltage signal at about 0,7 volt. An additional diode added in series with transistor base to ensure that off when the voltage op-amp is 2 volts. ...
.. off and there is absolutely no current drain from the battery. When the sun gets up and panel starts producing at least 10 Volt, the LED lights and the two smalltransistors switch on. This powers the regulator circuit. As long as the battery ...