The beautiful color of this cedar wood retaining wall by @tedmade.woodwork shows off the plants on both sides. A wood retaining wall is a more cost-effective choice than stone or concrete, but lacks ...
Retaining definition: Of or pertaining to something that retains something else, as with a retaining wall.
A wall is a structure and a surface that defines an area; carries a load; provides security, shelter, or soundproofing; or serves a decorative purpose. There are various types of walls, including border barriers between countries, brick walls, defensive walls in fortifications, and retaining walls that hold back dirt, stone, water, or noise. Walls can also be found in buildings, where they ...
The components are inexpensive, consisting of a P-MOSFET (for use in the positive rail) with a dual PNP transistor and two resistors. Q1 and Q2 form a current mirror circuit that act as a differential amplifier which responds to the voltage drop across the MOSFET.
Just wondering what can be used as an inexpensive potting compound. The commercial solutions seem fairly expensive at $40.00 for 350ml. The small 12V timer...
The device is not inexpensive (≈$5 USA) but its simplicity and low parts count in this application means the overall parts and assembly costs will likely be significantly less than using a discrete parts design or cheap IC regulator such as the LM317, with all the associated circuitry required to perform these same functions.
Sadly, the days of inexpensive PCBs from China are over for US citizens – you all know why so we need not discuss that. The prices from China still beat the prices from US sources in most cases, but even then, there is uncertainty in what the real cost may be with the fluctuating rule changes...