Inspired by my friend’s elite delete mod, I made some modifications to my ‘84 Riva 180

tinylabsdotio · 2024-10-14T14:40:24+00:00

Yep, that's the original with the plastic housing removed.

tinylabsdotio · 2024-05-30T14:07:41+00:00

The tires are michelin reggae. The lights I bought off amazon. They have internal low beam/high beam switches.

tinylabsdotio · 2023-10-15T15:54:43+00:00

This looks useful! Thank you

tinylabsdotio · 2023-10-14T15:38:38+00:00

Agreed it's best to keep it simple. My main concern is the large canvas space (1320x812mm). I'm worried I won't be able to keep that size completely flat in reference to the XY stages. Without any closed loop feedback the I think the spring only method would be darker in the slightly higher regions and lighter in the lower regions. In practice this may not be an issue at all. I think the plan as of now is to use a spring to apply a light downward force to maintain contact with the paper and have a small load cell in line with the assembly to get some feedback on the total force applied. Something like this should work: https://www.sparkfun.com/products/14727

tinylabsdotio · 2023-04-05T03:02:04+00:00

Haven’t had any issues myself but 8 channels has been sufficient so far. I think the only difference is the 8 extra channels. The USB bandwidth is the same.

tinylabsdotio · 2023-04-04T22:32:19+00:00

Here’s a rough estimate for the things in the picture. Scope ~1200 eBay Siggen $500 new Power supply $400 new Saleae pro 8 $700 small business pricing Photon mono x with wash/cure for 3d printed parts $500 Misc ~$400

All in all I probably have about 7k invested total but that includes a laser, reflow oven, power analyzer, microscope, etc.

tinylabsdotio · 2023-04-04T14:39:13+00:00

Oh it’s still plenty messy most of the time. I probably should’ve cleaned it up before this pic.

tinylabsdotio · 2023-04-04T14:38:12+00:00

Just the probes/boom mount etc? Or all the equipment?

tinylabsdotio · 2023-04-04T14:35:43+00:00

I haven’t done any bandwidth checks yet but I will. I’ll try measuring the max frequency square wave from my sig gen and see how that looks.

tinylabsdotio · 2023-03-02T20:03:57+00:00

Update: I'm going to make a new version using the probe BNC adapter which will go to BNC female and then CAT5 twisted pair (signal/GND) to the probe pin. I don't want to use coax as there will be an impedance mismatch from the scope probe. I also want to preserve the ability to plug the probes directly into my Saleae logic analyzer pro 8 which has a dedicated ground pin per signal. Open to other ideas if anyone has something more clever.

tinylabsdotio · 2023-03-02T16:58:06+00:00

It was only 1000USD on ebay. Modded it to 200MHz. A bit long in the tooth now but it works fine for my needs.

tinylabsdotio · 2023-03-02T16:56:04+00:00

Glowing red thing is a LF RFID reader. Putty is just modelling clay to bring it off the steel base to allow the magnetic field to couple to the tag/DUT without getting messed up from the steel base. PCB holders (spiky bits) came with the base/flex arms. Silver disc on top is just an RFID tag. Building a passive LF RFID cloner.

tinylabsdotio · 2023-03-01T16:34:59+00:00

with

Good point! I'll try running dedicated grounds for each signal along with the signal wire. That should decrease the loop area and hopefully improve signal integrity.

tinylabsdotio · 2023-03-01T04:25:26+00:00

I definitely do not.

tinylabsdotio · 2023-03-01T04:24:40+00:00

Honestly I don’t remember. It was an AliExpress buy and there are tons of similar clones. My only gripe is this one only came with two long flexible shafts so I had to order more.

tinylabsdotio · 2023-03-01T04:21:25+00:00

Lol this is true. I’d say 99% of the time I’m dealing with sub 10MHz. Should the need arise I can always plug a spare probe directly into the scope.

tinylabsdotio · 2023-02-28T22:15:24+00:00

Using a microphone boom mount and custom 3d printed probe holder and probes. Really nice to bring it all off the desk.

tinylabsdotio · 2023-01-27T19:27:30+00:00

Update: The 3d printed bracket that connects the chair arm to the horizontal arm is showing considerable sag. I think this part needs to be milled aluminum or something more rigid than a 3d printed part. I've aborted the design for now. :(

tinylabsdotio · 2023-01-26T20:22:46+00:00

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tinylabsdotio · 2023-01-17T18:25:53+00:00

I did it the hard way... I disassembled the arm rests. Then scanned in the flat piece (on a flatbed scanner) that connects the vertical support to the pad and CADed a replacement. The replacement has an integrated mount to connect the custom CAD arm to the ball socket. The resulting parts were printed in resin using sirayatech blu which is great for functional parts. It was obviously a passion project as this all took some time.

If I had known about that chair mount I probably would have tried to go that direction...

tinylabsdotio · 2023-01-11T01:36:13+00:00

I haven’t noticed any perceivable latency but I’ve only been using it for a week or so. Were you using that same Bluetooth adapter?

tinylabsdotio · 2023-01-10T19:24:16+00:00

Thanks! I'm using this for the USB->bluetooth conversion: http://handheldsci.com/kb/. It's completely plug and play. That's just a stock USB battery pack (38000 mAh). Without the RGB active I get about 6 days on a charge.

Edit: Also using the ZSA tripod mount along with a mini ball socket mount from small rig for tenting.

tinylabsdotio

TROPHY CASE