Two Sets of 10 channels O'scope and Multimeter Multi-Inputs Selector.

Two Sets of 10 channels O'scope and Multimeter Multi-Inputs Selector --

Two rails of O'scope can measure 20 points, or a single rail can measure 10 points and use another multimeter to measure 10 points.

O'scope And Multimeter Multi-Inputs Selectors :

This multi-inputs selector was designed to measure many points of the circuit, the voltage level is 0 to 5V or logic pulse, I also drew a 40 channels monitoring points based on a single-chip controller as 8748 long time ago, but I haven't completed it, actually is too lazy, and this two sets of pure logic circuit 10 inputs channels completed first, but this circuit was designed at about 21 years ago(1995), I were put it in the box without completed until 8 years ago sorted out and found out the problems, complemented part of the circuit which wasn't completed, and finally, the function was worked normally, the Vcc was provided by +5 V power supply, it can be changed to add a 7805 with 9V battery, the total quiescent current consumption less than 20 mA, almost the power consumption focus on NE555 and LEDs. 

All the details are shown in the completed projects' forums.
Two Sets of 10 channels O'scope and Multimeter Multi-Inputs Selector.





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