Question: Working through Learning the Art of Electronics, Hayes T, I'm stuck trying to build the diode clamp in Figure 3L.7 on page 137, as below:

[![enter image description here](https://i.stack.imgur.com/dGApT.png)](https://i.stack.imgur.com/dGApT.png)

The text says to, "*Drive it with a sinewave from your
function generator... ...and observe the output.*" So presumably +ve from the function generator connects to "in", +ve from the power supply to "+5 volts", and scope probe to "out". 

Having searched the web and studied various clamp schematics, I still can't work out the answer to my question which is, where to put the ground leads from function generator, power supply and oscilloscope?

Thanks

David

Answer: 
The schematic is missing a ground connection which would connect the ground of the power supply, function generator and oscilloscope probe together.
That is only a partial schematic, the rest is implied and is shown below. The scope goes across the two terminals on the right.

![schematic](https://i.stack.imgur.com/jJO0d.png)

[simulate this circuit](/plugins/schematics?image=http%3a%2f%2fi.stack.imgur.com%2fjJO0d.png) – Schematic created using [CircuitLab](https://www.circuitlab.com/)