Abstract: The present disclosure is a battery emulator that permits the development and testing of battery software, firmware, and/or circuitry with lowered risk of shock, explosion, fire, or other dangerous conditions. The battery emulator may include a single input voltage source that provides an input voltage to an adjustable voltage regulator. The battery emulator further includes a user control device coupled to the adjustable voltage regulator and configured to control an output of the adjustable voltage regulator, wherein the output of an adjustable voltage regulator is configured to replicate an output voltage of a single battery cell of a multi-cell battery. The battery emulator further includes voltage isolation circuitry which isolates the input voltage and/or output voltage from an adjustable voltage regulator, preventing them from interfering with the user control device.

Abstract: A computer-implemented method and system for purchasing products and services by customers utilizes a product scanner or other input device to collect information directly from the product or description of the service the customer wishes to purchase. The scanned information is transferred to an Internet access device for transmittal to a web site for processing and organization to present a shopping list to the customer. The shopping list may be automatically or selectively processed to order the selected products from member vendors for shipment directly to the customer.