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I don't think I'm that "all over the place":
Your first suggest was literally what I wasn't looking for:
I think I found my solution using a DPDT breaker:
The user enables the system with the breaker. The software then enables the system with Soft_EN1. The user then may shut down the...
I'm looking for something more like a circuit breaker function. Something that the user manually sets an can unset, but the system can also unset.
We have a couple Kepco power supplies with main switches that the supply can toggle if an overvoltage/overcurrent is detected. This forces the user...
I have a requirement to have a double safe guarded system: user-manually and software-automatically enable/disable the system. Its easy enough to have a e-stop in series with the relay, but I would like the software to be able to disarm the e-stop button. If the software detects an out of...
I have a small board 30mm x 5mm. I am working on the documentation portion of the project. In Altium 18 I used the Place>Design View and changed the scale to 2:1. The size is great for a letter size print, but I cannot get the pads or solder mask to appear in the design view. I placed five...
Yes! That worked. I assumed that because I had a 16x2 display, the second line would start at address 32. Writing data at address at 40 starts the second line. Thank you!
I bought a 16x2 display off ebay six years ago and I am finally getting around to building something with it. As far as I can tell, its a HD44780U display and it appears to have ROM code A00 (reduced character set).
When I first got the display, I tested it quickly and confirmed that it was a...
On page 16 of the LM22675 datasheet (https://www.ti.com/lit/ds/symlink/lm22675.pdf) it shows the device being used in an inverting buck mode. My question in the circuit is what is Vout (top right of circuit)? THe datasheet does not have an explanation of the circuit and I didn't see an...
I would make that 1K resistor a little bigger. If he zeros out the pot, that puts a 1K load across the batter at all times. A constant 6mA is going to kill the battery in 30 days.
You might want to put in a latch. When you disconnect the battery from service the voltage will rise..... enough...
I don't know of a way to know the location of the armature without:
A) a sensor on the shaft. You can use a potentiometer, hall-effect, capacitance sensor, etc
B) running the motor past the end of travel. If you are running some sort of drive system that can handle this abuse then this is the...
Thank you for the reply Keith,
I've attached the whole page this time. The attachment is the original schematic that I received. I have had zero luck finding direct replaements for the AD9701 and the AD9048 and I have not had any luck finding existing stock (Rochester made an aftermarket AD9701...
Hi all, I need some help with a redesign. The existing design uses two AD9701 video DAC to adjust an incoming video signal's gain and offset and then it uses a AD9048 to digitize the signal and dump it on an 8-bit data bus and saved in RAM. The AD9701s are not used to generate a video signal...
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