Dredd 2012 Lawgiver II functional build

[Nicodema]

Hi
You know what? After getting a whole load of family stuff sorted, it looks like I may actually have some time to clear a workspace and make a couple of boards.

BTW, I'll only be making up the interface boards, you'll be needing to order a display (I'd get a couple in case of breakage). This is the display I recommend (ebay UK listing, but they're in China so ship everywhere and appear on other "ebays"):

Blue Serial SPI I2C 2.2"128x32 Dot OLED Module Display w/Tutorial,Free Connector | eBay

Find many great new & used options and get the best deals for Blue Serial SPI I2C 2.2"128x32 Dot OLED Module Display w/Tutorial,Free Connector at the best online prices at eBay! Free delivery for many products.

www.ebay.co.uk

They do take a few weeks to arrive, so like me making the boards it's not a speedy thing
Speaking of which, I hope I haven't lost the SMD soldering knack.

 

[Nicodema]

Progress. I've soldered up a couple of boards and tested them. I've also blown up another screen.

The cheap generic XL6009 boost converters on ebay/amazon are rated 3-30v input but that's unsafe, once you get below around 4v input, the out goes unstable and can swing up high enough to pop the SSD1305 chip on the display. I even heard it go this time!

Don't use one of these

I recommend the Matek, RC oriented unit, like this:

I got mine here: flyingtech uk
Also available here: ebay uk

This board is designed to run POV drone cameras, etc (usually 9v or 12v) from a 1S lipo pack, which is exactly the use case we're dealing with here. I've characterised the board and as the input voltage goes below 2.5v the output just drops harmlessly to a low level, just below supply, rather than swinging high like the XL6009 based units. Yay!

I ran into library hell getting the newest SSD1305 and GFX libraries from Adafruit to play nicely. The biggest gotcha is their latest demo sketch for the SSD1305 lib doesn't run unless you open the Serial Monitor on the Arduino IDE. I've updated my code to use the latest libs, so I'll make that available to those that need it. A nice bonus is that you can now choose the hardware SPI clock rate. It was defaulting to 250kHz on the old libs, but it runs great at 4MHz, with a much faster screen update.

 

[MangyDog]

If you keep blowing up stuff, get the parts from china on Aliexpress.... its a lot cheaper Its the same stuff youre getting from ebay, but without the local markup

 

[Nicodema]

Ha! Trying not to, but given I've popped two now, maybe not a bad point. Annoyingly this display doesn't seem to be available via Aliexpress any more, and isn't too overpriced via Ebay since it comes direct from China anyway.

That said, it is available direct from BuyDisplay...

Blue 2.2 inch 128x32 OLED Module I2C Display Serial SPI,SSD1305

ER-OLED022-1B is 2.2 inch 128x32 oled module i2c display serial spi interface,ssd1305 controller,blue on black,wide temperature and view angle.

www.buydisplay.com

and that saves around $3 per panel. If I was going into production I'd go that route, but for the occasional item it's below my material limit.

 

[Confused85]

I bought my display from buydisplay. I cant remember the price but I had no complaints on service.

 

[Dingo80]

I love Karl Urban's Dredd. I have a Lawgiver laying around somewhere. I might have to get one of your boards once they are all done and ready to throw in it hehe

 

[Murderink]

Progress. I've soldered up a couple of boards and tested them. I've also blown up another screen.
View attachment 1356663

The cheap generic XL6009 boost converters on ebay/amazon are rated 3-30v input but that's unsafe, once you get below around 4v input, the out goes unstable and can swing up high enough to pop the SSD1305 chip on the display. I even heard it go this time!

View attachment 1356656
Don't use one of these

I recommend the Matek, RC oriented unit, like this:
View attachment 1356657
I got mine here: flyingtech uk
Also available here: ebay uk

This board is designed to run POV drone cameras, etc (usually 9v or 12v) from a 1S lipo pack, which is exactly the use case we're dealing with here. I've characterised the board and as the input voltage goes below 2.5v the output just drops harmlessly to a low level, just below supply, rather than swinging high like the XL6009 based units. Yay!

I ran into library hell getting the newest SSD1305 and GFX libraries from Adafruit to play nicely. The biggest gotcha is their latest demo sketch for the SSD1305 lib doesn't run unless you open the Serial Monitor on the Arduino IDE. I've updated my code to use the latest libs, so I'll make that available to those that need it. A nice bonus is that you can now choose the hardware SPI clock rate. It was defaulting to 250kHz on the old libs, but it runs great at 4MHz, with a much faster screen update.

Definitely keen on one if they are still in the works!

 

[xl97]

+1

Lawgiver is def on my list of 'to-dos/must-have'.. If you have a decently priced pcb, I'm all for it!

Nice job!

 

[BeakZ]

Hi
You know what? After getting a whole load of family stuff sorted, it looks like I may actually have some time to clear a workspace and make a couple of boards.

BTW, I'll only be making up the interface boards, you'll be needing to order a display (I'd get a couple in case of breakage). This is the display I recommend (ebay UK listing, but they're in China so ship everywhere and appear on other "ebays"):

Blue Serial SPI I2C 2.2"128x32 Dot OLED Module Display w/Tutorial,Free Connector | eBay

Find many great new & used options and get the best deals for Blue Serial SPI I2C 2.2"128x32 Dot OLED Module Display w/Tutorial,Free Connector at the best online prices at eBay! Free delivery for many products.

www.ebay.co.uk

They do take a few weeks to arrive, so like me making the boards it's not a speedy thing
Speaking of which, I hope I haven't lost the SMD soldering knack.

I would be interested in a board if you're still planning on making some? I've got a screen and have coded a prototype using a smaller OLED, but haven't yet managed to build a board for the 128x32. As much as I wanted to go the whole hog and design the PCB myself, I'd rather get on with the project now

 

[Meng]

Would def be interested in a board as well!!! Awesome work.

 

[BeachcomberBob]

Ha! Trying not to, but given I've popped two now, maybe not a bad point. Annoyingly this display doesn't seem to be available via Aliexpress any more, and isn't too overpriced via Ebay since it comes direct from China anyway.

That said, it is available direct from BuyDisplay...

Blue 2.2 inch 128x32 OLED Module I2C Display Serial SPI,SSD1305

ER-OLED022-1B is 2.2 inch 128x32 oled module i2c display serial spi interface,ssd1305 controller,blue on black,wide temperature and view angle.

www.buydisplay.com

and that saves around $3 per panel. If I was going into production I'd go that route, but for the occasional item it's below my material limit.

I'm using a 2.08" OLED (256x64) from DisplayModule which has better proportions to fit the gun, with a little tweeking to the 3D model. I'm 99% there on the build, with just the silencer (in-out action) to nail down. here's my bench test -

 

[SonicShadow191]

Been watching this build for a little while and finally decided to join to add that I'd also be up for a board if/when they're available. Now i have the time (the upsides of redundancy) and a decent printer, I'm finally putting together a lawgiver with the files i bought all the way back in 2016.
Also i'm a little new to electronics side but want to make some projects that can improve this. That being said, do you have/could you make when done a parts list please?
Great work!!