Probe for battery driven devices. Do-It-Yourself

Probe for battery driven devices. Do-It-Yourself Most of consumer equipment including portable radio receivers and radio recorders are used with standard battery cases integrated into a case compartment. Several battery cells with 2 or more batteries are located and connected in series taking into account power required to provide operation of the device or the instrument. Sometimes a voltage of a battery circuit useful current of a device or tested instruments shall be measured in the battery compartment circuit immediately. Battery voltage can be easily measured. You shall connect multimeter probes to the utmost outputs of a battery compartment. The same multimeter shall be connected to a supply circuit break to measure useful current of the device. Sometimes it is very inconvenient because you shall unsold wire from a battery compartment with a soldering tool. Useful current may be measured with a simple device made of a foil-coated fiberglass plastic strip. You may use a double faced strip or cut one faced strip through-the-thickness and glue two strips together, if a double faced strip is unavailable. Grind a strip to provide a cone-shaped strip edge and cut lateral faces use the probe for any battery types. Then measure useful current of connected voltage using standard connecting wires.