The Relay based Multiplexer

© 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE

The Relay based Multiplexer

© 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE

Populate Common PartsD1Back EMF dampenerLED1 LED2Output 3 pin headerR1 470ohmR2 470ohmSW1 3 pin headerSW2 3 pin headerRL1 Relay

© 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE

Populate Sensor-MUX Qty4

R3 TBDR4 TBDR5 TBDR6 TBDR7 TBDR8 TBD

© 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE

Populate MUX main tree Qty3

SW1 3 pin headerSW2 3 pin header

© 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE

Jumper Cables

© 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE

Assemble the boards-Parts3 SPST switch harnesses1-9v battery harness10-3 wire connectors4 Sensor boards3 standard boards

© 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE

Step one Connect switch to

topmost board SW1

Connect SW1 to SW2 on next board down

Continue on remaining 2 boards

© 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE

Step 2Connect switch to

topmost board SW1

Connect SW1 to SW2 on next board down

Connect first row of boards to second row as shown

© 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE

Step 3Connect

last board, switch and battery as shown.

© 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE

Activity 1If a green light

indicates a zero,and a red light

indicates a one,What binary

number will select input E?

What is that in decimal?

© 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE

Activity 2What are the

binary numbers for:◦A?◦B?◦C?◦D?

What is the decimal number for H?