Activity Stream

Thanks for the info. I just got an email from OPT today saying they are back at work from the national holiday. I'll check to see if they actually installed the DT40's I ordered. All will be revealed... Craig

The OPT ones I've tested have some subtle differences from the same class of DT , especially in the amps. I could be wrong. But I think at least the PCB and mounts come off different production lines. Steve

Drrrpp de drrrpp. I guess I went from feeling dumb... to being dumb. Thanks for taking the time to give me an answer Chris.

right here! :)

Sorry about any neck strain from the sideways pictures, Craig

An update on the OPT 8W projector story. Ordered 3 more 8W RGB projectors with D/G wheels from OPT. Two will be above the spring line in an certain planetarium installation,and was pleased to learn that they can be made with white cases. Got the DT 40 scanner upgrade for a few bucks on all....

Thanks, Hank! Depends on the iOS device, if you have a device with lightning, there's an iOS lightning camera adapter. It has a connection for power and a USB port. If your iOS device has USB C, you can use a simple USB C to USB A adapter or something more complex like the iOS USB C to Digital AV...

The mica and quartz sand mines in South Carolina need to be protected with anti-missile systems, but I digress. Attached is today's interesting circuit, using LM or NE 555 as Base, Gate or Cable Drivers. The sub 200 nS switching time is respectable when driving a large gate capacitance, ...

Will it run on a IPAD or just IPhone? Steve

Very cool DZ! I'll have to give it a shot. How do you connect the WAVE-USB to the iPhone? And yes, Claude is freaking awesome. I'm about a month away from announcing my own WAVE recorder -- I dropped ESP32 and refactored my entire project onto Raspberry Pi, and it's been going great. And...

I set my system to time machine mode and looked back at an original LII specimen of the kind of choreography I'm still trying to figure out. Note it is just using curve pong, no joysticks or input from me except the cycloid. It's here in this video if you want to see it:...

What the world wouldn't have been without mica.

For some time I've wanted Yuletide cycloidery to be a thing. Nice to know I'm not the first. Hey Steve. I enjoyed that history of analog multipliers you gave us a while back. I'm reading a paper by Cockcroft and Walton about how they first disintegrated elements with high velocity protons....

Post two J Gerard Anderson's "An Electronic Spirograph" His "Christmas Tree" is included as well. When I was a kid I biked to two university libraries and an industrial library, snuck in as a well dressed kid with a dress shirt and a bit of grease on my chinos. Only thing I could...

File renamed to be professional. I miss Craig.. Great Member of the community back when. Steve

These boards used a then novel and expensive power opamp in a Pentawatt package. They need dual supplies and enable signals. You have what I have, enjoy Steve - - - Updated - - - These boards used a then novel and expensive power opamp in a Pentawatt package. They need dual supplies...

I just found my notebook, will open the binder tonight after work. Steve

Here's a video showing experiments using color mapping instead of color modulation, mostly. No 3D effects are enabled in this number. https://youtu.be/JGsdk6_dhBY

Hi Steve Thanks for the message. I don't have the laser (as yet) I was hoping to read up about it before possibly obtaining one. I had a Laser Physics Reliant WC300 back in the day, sadly long gone - lovely little laser :-) Best Simon

PSU looks like the Switched Resistor PSU for a 2017 series. see attached, "looks like" and "may not be" are two different things. They used the same case design for a lot of programs Spinnaker is a sealed mirror, non-polarized 800-1000 mW Whitelight. The WC-300 Reliant came on the market...

The reset signal & direction & spiral/diamond signals go to a true compliment driver (CD4041) and the non inverted & Inverted outputs drive analog switches (IH5012)