maybe Richard, can design and build a load cell based on websites, and another member of the electronic From: vicente_alvero_14@xxxxxxxxxxx To: sugarshot@xxxxxxxxxxxxx Subject: [SS2S-Main] Re: Digital scale load-cell design / instrumentation Date: Sat, 18 Jan 2014 13:36:17 +0100 I have not just knowledge of electronics, so this work should be made between several members To: sugarshot@xxxxxxxxxxxxx Subject: [SS2S-Main] Re: Digital scale load-cell design / instrumentation From: monsieurboo@xxxxxxx Date: Sat, 18 Jan 2014 07:11:34 -0500 It's been a few years since discussion of these digital-scale load cells was ricocheting around the rocketry forums. Naturally, I started by checking Nakka's site -- he's got a very cool "built from scratch" strain-gage design but I couldn't find one there that starts with a digital scale. But here's a good starting point for what you're talking about. This one hooks up to a PC with a "COM port" USB interface, and the author hand-rolled the electronics. http://www.steeman.be/?p=192 Enjoy! Mark L. DC -----Original Message----- From: vicente Alvero Zambrano <vicente_alvero_14@xxxxxxxxxxx> To: sugarshot <sugarshot@xxxxxxxxxxxxx> Sent: Sat, Jan 18, 2014 3:54 am Subject: [SS2S-Main] Re: Interesting Motor-Design Documents Hi Mattias, It would be great if you could you do this. I think the maximum thrust is 2000N, but better than Richard confirm it. Vicente Alvero From: mattias.lampe@xxxxxxxxxxx To: sugarshot@xxxxxxxxxxxxx Date: Sat, 18 Jan 2014 10:37:27 +0800 Subject: [SS2S-Main] Re: Interesting Motor-Design Documents If you want to go even cheaper, load cells can be scavenged from cheap digital kitchen/bathroom scales. It’s not too difficult to hook them up to a computer. I can probably help with the electronics, but not so much with the mechanical part. What would be the maximum force to be measured? Mattias From: sugarshot-bounce@xxxxxxxxxxxxx [mailto:sugarshot-bounce@xxxxxxxxxxxxx] On Behalf Of vicente Alvero Zambrano Sent: Friday, January 17, 2014 12:47 AM To: sugarshot@xxxxxxxxxxxxx Subject: [SS2S-Main] Re: Interesting Motor-Design Documents Instruments would be a gauge and load cell, right? but this must be commercial. some sets is "cheap". with relative to a support, I think we would have problems. that would be cheap. http://aeroconsystems.com/cart/load-cells/ maybe we can also use the pressure gauge and load cell minisshot rocket. Date: Thu, 16 Jan 2014 10:30:00 -0600 Subject: [SS2S-Main] Re: Interesting Motor-Design Documents From: richard.nakka@xxxxxxxxx To: sugarshot@xxxxxxxxxxxxx To design/build the instruments to measure motor thrust and chamber pressure. We would have to do this on a "tight" budget. R. On Thu, Jan 16, 2014 at 10:18 AM, vicente Alvero Zambrano <vicente_alvero_14@xxxxxxxxxxx> wrote: What kind of help with the instrumentation?