micro power flasher draws less than 50 µA

Posted on Aug 19, 2012

Some applications require a circuit to indicate that a battery`s voltage has fallen below a certain value. However, if you don`t frequently check the indicator, the low-battery indicator itself can easily discharge the battery. The circuit in Figure 1 indicates when the battery voltage has dropped below a preset value. The circuit draws less than 50 µA, regardless of whether the indicator flashes. IC1A operates as a simple comparator.

The circuit`s current consumption is 45 µA at 10V, climbing to 48 µA at 12V. The state of the flasher does not affect current consumption, because the LED receives its power via the capacitor. You have to make a number of trade-offs to achieve

Leave Comment

characters left:

New Circuits



Popular Circuits

Lowpass filter has improved step response
Zero Feedback Headphone Tube Amplifier
Delayed headlights circuit
Full-Cup Detector For The Blind
AM Receiver Circuit Using Transistor
Analysis of a Digitally Controlled Wien Bridge Oscillator
Long Range Cloner
simple optical switch
Simple FM Transmitter circuit schematic Long range short range using VMR6512 Hi-Fi Audio FM transmitter module
Wein Bridge Oscillator using ic 741 op amp
Hv440: High Voltage Ring Generator
Guitar Effects & JFET Splitter
TMB-1 Tri-Mode Buffer Amplifier Box