HardwareArduino

 

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 From:  ANT_THOMAS   
 To:  Chris (CHRISSS)     
40898.299 In reply to 40898.293 
Operation wheel bearings has entered day 3.

The chip could be an AT Tiny, I wonder if it could be reprogrammed with better software.
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 From:  Chris (CHRISSS)  
 To:  ANT_THOMAS      
40898.300 In reply to 40898.299 
Problems doing the bearings or needed parts? Are they easy to remove?

I'm pretty sure it was an ATTiny chip but can't remember which and I can't see from the pictures on my phone. I think part of the problem is it only has 2 PWM channels. I assume that other chip is a shift register or something similar.

Should be easy enough to repgoram it by connecting up the correct pins and using a programmer. Can the opposite be done? Read what's on there and reverse engineer it?

Me
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 From:  ANT_THOMAS   
 To:  Chris (CHRISSS)     
40898.301 In reply to 40898.300 
A bit of everything. One side the whole hub/bearing/drive shaft are very stuck. Ended up going to the scrap yard and getting a new hub, hub assembly and drive shaft. Then the passenger side bearing was an absolute pain to remove. Nearly done now....Hopefully.

I've thought about whether it's possible to do it backwards but I suspect not because the sketch is compiled then uploaded. I might be wrong though.
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 From:  Chris (CHRISSS)  
 To:  ANT_THOMAS      
40898.302 In reply to 40898.301 
That's a lot of parts changed just for the bearings :O Rusty old stuck parts are a pain.

Maybe the assembly code could be read from the chip? I don't know.

Me
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 From:  Chris (CHRISSS)  
 To:  ALL
40898.303 
I've also got variable speed beightnes adjustment on it so at low brightness it changes slower, and above a certain level it changes quicker.

Me
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 From:  Chris (CHRISSS)  
 To:  ALL
40898.304 
Looks like the Atmel chip is just an EEPROM so no idea what the unmarked chip is.

Me
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 From:  Chris (CHRISSS)  
 To:  ALL
40898.305 
I thought this was quite a neat trick.

Me

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 From:  Chris (CHRISSS)  
 To:  ALL
40898.306 
This is pretty cool. An Arduino with no PCB substrate, just steel wires attaching everything together.

And this, an Arduino dead bug DIP package.

Me
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 From:  koswix  
 To:  ALL
40898.307 
Multi track now working!

Floppy Organ stage 4: http://youtu.be/xKELHgElT90

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If Feds call you and say something bad on me, it may prove what I said are truth, they are afraid of it.

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 From:  ANT_THOMAS   
 To:  koswix     
40898.308 In reply to 40898.307 
Tell your classmates to shush next time.
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 From:  koswix  
 To:  ANT_THOMAS      
40898.309 In reply to 40898.308 
Bloody inconsiderate lab users.

In other news, Digilent sent my lecturer 15 USB oscilloscopes, presumably so he'd tell everyone how good they are and people would buy more.

Managed to blag one on long term loan for 'evaluation'. Looks very useful!

http://www.digilentinc.com/Products/Detail.cfm?NavPath=2,842,1018&Prod=ANALOG-DISCOVERY&CFID=7434699&CFTOKEN=10083b76485dfd4d-2C62310B-5056-0201-0251EEAF33D4F430

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If Feds call you and say something bad on me, it may prove what I said are truth, they are afraid of it.

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 From:  ANT_THOMAS   
 To:  koswix     
40898.310 In reply to 40898.309 
Gotta love the markup on stuff like that. They're clearly still making money on the $99 sales.

Reminds me of the extortionate prices of lab equipment when I was working at a uni. Stirrer hot plates being one of the items that made me angry. They're just a hot plate with a magnetic part spinning under the plate so you can pop a stirrer bar in the flask and get things stirring. Not sure I saw even the basic models under around £300.
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 From:  koswix  
 To:  ANT_THOMAS      
40898.311 In reply to 40898.310 
Yeah. Niche market /low volume sales = silly prices.

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  │   │      │   │                              
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If Feds call you and say something bad on me, it may prove what I said are truth, they are afraid of it.

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 From:  ANT_THOMAS   
 To:  ALL
40898.312 
Bought some dip sockets from China for my shift registers. Came as a pack of 30, thought they'd arrive in a small jiffy bag....

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 From:  Chris (CHRISSS)  
 To:  ANT_THOMAS      
40898.313 In reply to 40898.312 
That looks like quite a large package.

Ive had some success with my Arduinos (dismantled the one for my lights) and the transceivers. I had one plugged into my phone and the other into the laptop. Tried the led remote example with the RF24 library and it worked but unreliably. Had to almost touch the things together to connect. I might try adding caps to see if that helps.

My FTDI cable doesn't seem to be working to program my mini though. The USBASP does. And the FTDI works with the serial monitor.

Me
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 From:  ANT_THOMAS   
 To:  Chris (CHRISSS)     
40898.314 In reply to 40898.313 
Are you having issues getting it to reset? I found it a real pain in the arse to time it right (yj).
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 From:  Chris (CHRISSS)  
 To:  ANT_THOMAS      
40898.315 In reply to 40898.314 
I'm not really sure what the problem is. Could be resetting it at the correct time.

Although now I'm not sure if I've broken it. I tried my USBASP cable to repgoram the bootloader. I'd read somewhere to try that. Not when I try to do anything, even with the USBASP, it says it's not responding :S

Me
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 From:  Chris (CHRISSS)  
 To:  ALL
40898.316 
I was getting an error trying to reflash the bootloader but I fixed that. I had to update the firmware on the USBASP using my Uno so it could set the clock speed when programming. Managed to get the bootloader working.

When I try and upload a sletch now it says content mismatch.

Me
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 From:  Chris (CHRISSS)  
 To:  ALL
40898.317 
Ok, it's working, but only if I upload it really slowly. Better than nothing I guess. Still can't get the FTDI to work.

Me
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 From:  Chris (CHRISSS)  
 To:  ALL
40898.318 
Looks like it was the Arduino board. I had another Pro Mini turn up today. Soldered the program pins to it and the FTDI cable worked with no problems.

Me
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