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22nd Jan 2022
Here is a summary of design ideas and basic learning for Electronic Enthusiasts. Mainly from my Amps-n-Volts Email Newsletter that was popular around 2002.
Whatever be the specs, design or simulation ... nothing like a 3D working prototype being tested by the customer in his environment. So do not go into volume production till such a test is done.
Quality: cost effective design, quality components, quality workmanship with good testing can result in a quality product. The packaging and production engineering too is important.
Do not mix mechanical and electrical connections, these leads to failures and frequent need of repairs and service. In industrial electronics equipment, connectors are a source of many problems, hence avoid connectors. vibrations, corrosion and frequent usage will result in strange problems.
High voltage or current stress, mechanical vibration, user misuse, High Energy stress (freq and voltage), aging (cycles) cause failure.
When we draw circuits we have to keep in mind the readability, the circuit should be laid out according to the signal flow, the input output ports shown in the periphery of circuit.
The Contact resistance of connectors, thermocouple effects in connectors and solder joints and thermal gradients over the PCB can cause errors when you measure in high resolution.
Selecting the parts for your product design, choosing the components intelligently is a part of Product Design Engineering. Budget, Availability, Size, Alternate Vendors, Product Life and Quantity to be manufactured are some factors that determine the selection by a prudent and experienced design professional.
Some EMI-RFI causes are - Switching Loads Simultaneously (inductive loads). Power factor correction capacitors and devices. Lightning strikes (enhanced by earth faults). Line Inductance (inductive kickback, resonance). DC and AC Drives for Motors. Rectifiers with large filters and stray inductance.
more at Basic Electronics and Circuit Design
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Creative Work, ideas and documents of delabs can be used for Product Design and Development by R&D Engineers, Hobbyists, Students and even firms for creating useful products. These cannot be used for reprint, replication or publishing online or offline.