When it comes to circuit design, standard practice rules avoiding parallel loads on an analog output to prevent signal degradation and maintain stability.

However, in the real world, client requirements are often more “challenging" than the textbook allows. Recently, a client insisted on a multi-load parallel configuration. Since waiting for a commercial signal booster module wasn’t an option for the immediate testing phase, I decided to take matters into my own hands.

I prototyped a simple single-channel signal amplification circuit using basic components I had on site.

• The Result: The circuit successfully passed the load amplification test for the analog output signal, with performance holding steady.
• The Cost: The total cost of components was less than NT$30 (approx. $1 USD).
• The Takeaway: While the hardware cost next to nothing, the conceptual design and the ability to solve a critical problem on the fly are priceless.

In the world of industrial automation, standard modules are great for convenience, but the “hard power" to apply fundamental principles and solve a problem on the spot—that’s where the true value lies.