Thread: Lrl from Italy
View Single Post
Old 10-05-2017, 12:12 PM
FrancoItaly FrancoItaly is offline
Join Date: Feb 2006
Location: Liguria, Italy
Posts: 924

Originally Posted by VECTROUM View Post
Hello to all, i want to construct this lrl and if it is possible i want the latest pcb and parts list because i am confused.

Thanks in advance
The sensor stage:

For other sections (power and display) there are several possibilities. For power supply I would recommend two 9V series batteries + 7812 that provides 12V stabilized.

For display stage I suggest the 3 leds version and change P2 from 470K to 1M and R1 from 150K to 56K, P1 from 22k to 4.7K and add 2 x 8.2K resistances, one from +12V and P1 and the other from ground and P1. The purpose is to make more easy the threshold operation but depending on the output value of the sensor stage you have to change the 8.2K resistances, i.e 10k/6.8K or 15k/4.7k or others.
Attached Images
File Type: pdf displayStage.pdf (263.0 KB, 234 views)
File Type: pdf Power display stage(1led).PDF (299.7 KB, 178 views)
Reply With Quote