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The following Keysight FAQ answer puts the above remark in perspective:
Peak-to-peak noise is... particularly important for applications where noise spikes could degrade accurate measurements on a sensitive load, such as RF circuitry.
[RMS] is not an ideal representation of DC power supply...
I intend to use a small dual-switch signal relay to break two signal wires coming from the PUSH start button in modern cars. The current relay I have handles a max of 2A, but even that’s overkill because there are just digital signals being passed on these two wires.
Solid state relays are...
Re: How to use the same RELAY on 12V & 24V vehicles
Thank you for the tip.
I actually posted this same question in another forum today so I could get a lot of ideas at once. A suggestion made there was that I should consider using PWM on the relay coil, at 20kHz or higher, with at...
Re: How to use the same RELAY on 12V & 24V vehicles
Shunting all that current (24V down to 12V) through a Zener is perhaps not the best approach. But you are correct about 3.3V relays being available. It's just that they typically only carry 250mA, and with a 70Ω coil resistance being...
I designed a circuit that operates on both 12V or 24V vehicles (my 150mA-max output voltage regulator steps 12V or 24V down to 3.3V for an MCU and other digital circuitry). I also need a relay on the same PCB, and the MCU will use a transistor to switch the relay ON/OFF via the relay coil's GND...
The lowest cost SMD ceramic XR7 cap at Mouser that is suitable for my application, in the <10pc quantities I need, is US$0.85EA and 20% tolerance, and drops 30% in capacitance with applied 5V bias voltage. The 25V rated parts start at US$1.17EA and still have the same capacitance drop with...
The problem with ceramic capacitors is that they lose capacitance sharply with applied bias voltage. Many datasheets are completely ridiculous in that they don’t even supply me with a curve to see exactly how much the capacitance falls in accordance with applied bias voltage! To get around that...
In reply to your question, as I said in my previous post, the reason I have been thinking about Tantalum or even Niobium Oxide capacitors is because even the best electrolytic capacitors will leak at some point. Sure, it may take 15 years, but they will leak and need to be replaced. Solid...
Thank you for sharing your thoughts.
I'm pretty sure they are 6.3v rated in light of their size and in light of the fact their (+) side connects to the 5V rail. I now need to ponder suitable replacements. Tantalum are nice in that they won't leak, but the voltage derating is 50%, so I would...
I have an old accelerator board used in the PDS slot of an Apple Macintosh SE/30. The board was manufactured around 1994. I want to replace the electrolytic capacitors but I'm not sure how to decode the numbers printed on the caps. Here's a photo:

As you can see the numbers are:
22
6A...
I wrote the ASM code below and tested it in-circuit with H-BRIDGE and 8-ohm speaker. The code doesn't include a tonal sweep. This code is simply to test a simple duo-tone sequence of 625Hz for 600ms followed by 825Hz for 600ms, repeating. I created it to verify my NCO and CWG init routine...
Thank you for your reply, Brian.
I have an old WinXP PC that runs MPLAB 8.92 and MPASM 5.51 wonderfully, but it's too old to even upgrade to Win7. I installed MPLAB X 3.05 quite a long time ago, but I never liked its UI versus 8.x (and prior to 8.x, I had used 5.x for quite a long time). I...
Brian, I simply don't have a PICKIT3. Instead, I use a PM3 programmer. So what I was saying is that I don't have an in-circuit debugger.
Heading off on a tangent depends on who you ask. I only began using a 16F1508 chip because that was strongly recommended to me by some of the gurus over at...
FvM,
Thank you for your reply.
I actually posted about my project in the Microchip forums (a horribly buggy forum, by the way), and also on PICLIST. Despite my having posted actual ASM code, no one offered or pointed me to any existing Assembly code. I guess no one these days programs in...
I am using a PIC to generate tones that will be outputted via H-BRIDGE to an 8-ohm speaker. An H-BRIDGE requires 2 complementary (180° out of phase) outputs to be fed into it. The CWG module of the PIC provides those outputs with no major programming required on my part.
The NCO module of...
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