Search
For the benefit of later readers, I thought I would explain why the original circuit "didn't work" and how exactly the "correct" circuit differs from the original circuit. The issue is the 3-input...
It is a passive microwave/radio repeater. They were used as an economic way of getting around line of sight obstacles. I came across the information on these researching a way of passively linking ...
I have seen many engineers talk about ESD protection but I had never seen its effects myself. I made many small DIY projects and I have used bare hands to touch ICs and their pins,but nothing got d...
ESD is a very real concern on mass-produced goods with an expectation of quality and durability (i.e. those items for end-user consumption with warranty). So real in fact that there are numerous in...
There is no easy answer to time-estimation. Experience is essential, but even for experienced people it's never easy. For simple projects, like designing a DC-DC converter inside some larger produ...
Can a circuit board be waterproof enough to form a wall of a waterproof enclosure? Regular PCBs made of FR-4 with solder mask is what I have in mind. But I'm not barring less common PCB materials...
Recently I have heard this opinion from experienced engineers when discussing PCB design software. The common opinion was that Allegro and Altium are supposedly professional programs whereas Eagle ...
Signal characteristics are: 0 to 3.3V span 0 to 100Hz range( there will be noise superposed on top with unknown characteristics) Output resistance Rout=4700 ohm I want to sample that with a...
why water is such a danger for short circuits if the resistance is so high? Actually, the life safety danger for water is NOT a short circuit. In fact, a short circuit in a typical (all values...
The circuit above is used to control a 240W ceramic heater by means of a PWM signal at 30Hz, generated by a microcontroller, with 5V logic. The input is a standard 280W AC-DC external power adapt...
It takes high voltage to start the arc. Once started, the air is ionized, and becomes fairly conductive. It then takes much less voltage to keep the current flowing to sustain the arc. This also...
I don't have any special knowledge about how submarines get controlled, so this is mostly speculation. I expect that the actual controls are fine. There seem to be the necessary degrees of freedo...
Using pointer types In C, an object pointer such as uint8_t* ptr is the equivalent concept to use for hardware addresses. A compiler makes this pointer type large enough to contain all addresses in...
When writing firmware in C for a microcontroller, how can I directly access a memory location such as a hardware peripheral register, given its absolute address? Is there a way to do this safely an...
One rule of thumb is that a CAN network should never have any error frames when it is up and running. It is expected to have some when all nodes are "waking up", or if you hot plug something to the...
Although I have done multiple PCB designs which passed FCC and CE equivalents using the MCU's/Multiple MCU's, I have a doubt about how to approach the high speed design using FPGA SoC - main thing ...
This question popped up in the feed and I got curious. Here is what I could find. Note that I am not an IC engineer so my interpretation of some facts may be off. The 3.3V level is defined in the ...
I think the point is simply that there are much more demand on the buck-boost topology than on the Cuk/Sepic ones. And there are GOOD reasons for that: Several years ago, I asked a question on th...
You really have to compare datasheets. There are some general differences, but you shouldn't go by those in specific instances. MOVs usually have softer knees, are available at higher voltages, a...
Yes, you should connect the scope probe ground to the circuit ground near where you are probing. The unit under test (UUT) and the scope may have their grounds connected, but that is via a round-a...
I have also had this problem for production runs of 100s to 1000 where you don't want to spend too much on a full fancy jig. Put plain round pads on the bottom of the board. 50 mils is usually a ...
Self-answered questions can be OK here. Those are best when they are canonical questions on topics likely to come up. Some examples where I have done this are: What is a bootloader, and how would...
Bouncing signals When a mechanical switch opens and closes, there is often vibration in the contacts so that they open and close several times rapidly until the new steady state is eventually reach...
Currently, we have two categories, Q&A and Meta. Those seem to be working well. New topic type available A category can now be created where there is a single post per topic, with only comment...
