Tag Archives: battery tester

Variable High Power “Resistor” For Power Supply Testing

Schematic Diagrams      Comments Off on Variable High Power “Resistor” For Power Supply Testing

Current handling capability of a power supply system often needed to be checked. Finding high power rated variable resistor to provide variable load testing might be difficult. There is wire wound type but it’s not always available at your local store, and the price and performance might be disappointing. This… Read more »

Low Power Under- and Over-Voltage Monitor

Schematic Diagrams      Comments Off on Low Power Under- and Over-Voltage Monitor

This voltage monitor has two  threshold, VTH for undervoltage and VTH’ for overvoltage. Using the component values shown in the schematic diagram below, this circuit give 6V for VTH and 15V for VTH1. Above 6V, the LED indicator of this voltage monitor  circuit will increase the flash rate until reach… Read more »

LM10 Battery Voltage Threshold Indicator

Schematic Diagrams      Comments Off on LM10 Battery Voltage Threshold Indicator

A battery threshold indicator circuit shown in the schematic diagram below has current regulation mechanism in driving the LED. A sufficient current should be satisfied at the minimum voltage but no excessive current when the voltage is at the highest level. Balance pin (5) is used as the reference  voltage… Read more »