Question regarding esistor tolerances

Started by MaxMaxfield 7 months ago15 replieslatest reply 7 months ago85 views
When I was starting out in engineering ~40 years ago, I was told that if a resistor manufacturer was making a bunch of 10K resistors, for example, then their actual...

Ideas for circuit without MCU that needs switch debounce

Started by MaxMaxfield 7 months ago15 replieslatest reply 7 months ago90 views
I need to write a column about using hardware techniques to debounce switches -- if the circuit included an MCU we could do the debounce in software, so I'm looking...

RF integrating with pic

Started by blaze_embed_94 7 months ago6 replieslatest reply 7 months ago66 views
I am trying to build a device which identifies itself , for example , I am interfacing rf module of any frequent range with pic microcontroller and I'm building...

How to access gpio from userspace and kernelspace continuously and sequentially

Started by Saniya 8 months ago4 replieslatest reply 7 months ago96 views
Hello Everyone,I need your help to write a clean code to toggle gpio in userspace and kernel space simultaneouslyI am working on a project, which involves cryptography...

Energy managment

Started by Keturioz 8 months ago4 replieslatest reply 8 months ago56 views
Hello, I want to build an embedded system. The difficult part is, it only gains power at certain times. So I obviously need a battery pack, and i need to charge...

Anybody experienced in Advantech PCM 9373

Started by ve3id 8 months ago6 replieslatest reply 8 months ago49 views
I picked a couple out of the 'for later use' pile. They each came with Philips LP104S5 LCD panels/.I want to build a dual dhcp and nfs server and thought that they...

Protothreads vs State Machines

Started by serbayozkan 8 months ago119 views
Dear forum membersI study/work on event-driven programming in embedded systems for a while. I follow the Miro Samek's articles, book (Practical UML statecharts in...

When is a State Machine not a State Machine?

Started by MaxMaxfield 9 months ago12 replieslatest reply 9 months ago208 views
Suppose we have a loop() function in an Arduino sketch (program) that looks like the following:void loop(){    digitalWrite(PinLed, HIGH);    delay(1000);   ...

Custom LCD

Started by Kocsonya 9 months ago2 replieslatest reply 9 months ago68 views
For a scientific project I'd need a linear polariser where I can control the polarisation angle on a pixel by pixel basis.My idea is to use an LCD, with only one...

AT45DB641E dataflash

Started by gowtham_kk 9 months ago5 replieslatest reply 9 months ago57 views
In the process the migrating from using a memory chip AT45DB081D (1MB) to AT45DB641E (8MB) for little larger space, I got stuck.I was using the drivers for the dataflash...

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