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I need a connector for a 1.5mm pitch flat flex connector. The only places I found selling them are some Chinese factories with an MOQ of 500 or 1000.
Does anyone make them? The only alternative I can think of is to use a 0.5mm pitch connector and every 3rd pin, but alignment will be an issue.
Okay, I have a circuit that works in the simulator. This both scales (10.8x gain) and offsets the output to 1.89V, which I can work with. The output is inverted so voltage falls as current goes up.
I am having trouble making it work with an LM321 but in theory it should be fine.
Thanks for the response. I have 3.3V, 5V and 12V available but can generate pretty much anything I need.
Oh, and I have a precision 2.048V reference (LM4040) that I used as the analogue reference for the ADC, with a 1.024V bias voltage generated by a resistor divider. That is why the ADC can...
Hi. I am using an ACS710 hall effect sensor to measure current in a device for fully automated testing. The problem is that the ACS710 produces a 0-5V signal with 0A biased to 2.5V. My microcontroller can only measure 0-2V and I am only interested in positive currents, so what I need to do is...
Thanks Chuckey. I will try to disassemble the master device since the slave won't respond with the resistor removed. Having said that it might be pulled up and it would be interesting to see if it is pulled to 5V or 3.3V. Unfortunately I don't have any datasheets for the cabling, but there is a...
The peripheral I have to examine has a custom microcontroller of some kind connected to the bus like this:
**broken link removed**
I was unable to measure the capacitor with my multimeters, probably off the scale. In fact I only think it is a capacitor because it is labelled C2 on the PCB, but...
Thanks Goldsmith. The cable is coaxial. I have a peripheral that communicates with the embedded system I am trying to copy. I can emulate the embedded system okay, but I am having this problem emulating the peripheral.
It isn't a big problem because it is clocked serial, so I can just slow down...
Hi.
I am having a problem with a 1MHz bus running over a 1.5m line connected to an AVR. As you can see in the image below there is some nasty bounce at the edges of my signals:
**broken link removed**
That is with a terminating the line with a 36 ohm resistor. I picked 36 ohms because I have...
The card we have is H8/325 based. I will post a picture later for you. Might not be manufactured by Apollo, unfortunately it is installed in a panel and I can't see a model number on the top.
My goal is to be able to replace the fire alarm panel with an embedded system running Linux. The current panel we have uses RS485 to communicate with an Apollo interface card. I can't find any documentation for the card though so basically I need a way to talk to devices on the Apollo bus...
Hi.
I am looking for documentation on the supposedly "open" Apollo network protocol. It uses RS485 to read various sensors and operate devices in buildings, usually controlled by a fire control system panel. Several companies produce Apollo compatible hardware.
I can't find any info on it at...
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