12V Battery Charge Nominal Discharge (Low) Indicator Circuit
This circuit monitors car battery voltage. It provides an indication of nominal supply voltage as well as low or high voltage.
| PARTS LIST | |
| R1 | 1.5kΩ |
| R2 | 1.5kΩ |
| R3 | 1kΩ |
| R4 | 1.5kΩ |
| R5 | 1.5kΩ |
| R6 | 10kΩ |
| R7 | 10kΩ |
| VR1 | 10kΩ Preset |
| VR2 | 10kΩ Preset |
| D1 | Green LED |
| D2 | Yellow LED |
| D3 | Red LED |
| IC1 | LM741 |
| IC2 | LM741 |
741 PIN CONFIGURATION
VR1 and VR2 adjust the point at which the red, yellow and yellow, green LEDs are on or off. For example the red LED comes on at 11V, and the green LED at 12V. The yellow LED is on between these values.
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great design, well not bad service will take a look closer, well not bad site, not so many programs listed but looks quite great.