This Project comes from the necessity of getting a wave generator with a bandwidth over 10 Mhz and an harmonic distortion under 1%, all of this with a low cost price.
This document describes a design of a wave generator with a bandwidth over 10MHz , which produce: sine, triangle, sawtooth, or square (pulse) waveforms with an harmonic distortion under 1%, duty-cycle adjustment, frequency modulation, TTL output and offset voltage. It is also presented the design of a frequency counter.
Step 1: Parts list
The main part, MAX 038 is a discontinued part, but it still can be bought .
It is attached an approximate budget.
Step 2: PCB made
It is double faced PCB. The chosen process is a chemical one, so the first thing we have to do is the serigraph of the layout with a laser machine, and after the chemical process.
Firstly, we begin with the layouts in JPG format, due to it is a double faced PCB, we will have to turn over the PCB to do the serigraph by both sides, because we are going to use a laser machine. for this reason the PCB must have exactly the same size than the layout or at least one of the sizes,( depending on the direction in which we turn over the PCB).
After cutting the PCB with the exactly measurements ( it is also possible to adjust the layout at the PCB ) the PCB is painted with black acrylic spray paint. ( it must be painted at least one day before)
The PCB must be placed at the left top corner, ( the 0,0 point of the machine must be exactly at this point) because when we turn over the PCB, it has to be exactly in the same place in order to make the holes coincide.
The layout dimensions are: 207,5mm X 52 mm.