Quote:
Originally Posted by alisuri
Hi
I already built the original version of the LRL. The critical tests concerning voltages, touch ...
work well.
Is it necessary to impose the modifications like amplification.
Thanks
Ali
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In previous posts I suggested increasing R2 (from 220K to 560K) and decreasing R1 (from 150K to 56k) to increase the gain. Furthermore, to make P1 adjustment easier, 2 resistors (22K), one on the + 12V side and the other on the ground side should be placed in series with P1. The exact values of the 2 resistances must be found experimentally because it depends on the output value of the sensor stage (connected to the + input). If you increase the value of a resistance, you must also decrease the value of the other, so that their sum is in the range 30 - 50K. The ideal value is when P1 is set to maximum to the right, the first LED lights up and the buzzer sounds.