| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| ggallant | "I interested in learning more about your project. I am a retired embedded software engineer who dabbles in hardware. " | Read more » | over 4 years ago | |||
| ggallant | "A friend with 3D printer made these battery holders for the riffle. She printed two sets with slightly different inside diameters. I have a loose o..." | Read more » | over 8 years ago | |||
| ggallant | "I just got a new laptop with Windows 10. Installed the Arduino IDE and plugged in the riffle. Couple of sounds relative to a new device being plugg..." | Read more » | over 8 years ago | |||
| ggallant | "Don, I have a small list of suggested modifications, all dealing with power. What / where / when is it appropriate to comment? George " | Read more » | over 8 years ago | |||
| ggallant | "D5 appears to connect the INT/SQW on the RTC to PD5 on the CPU. I would be very interested in how one uses the feature. I'm assuming that it requir..." | Read more » | over 8 years ago | |||
| ggallant | "Chris, I really don't know the actual time but assuming 800usec (nice for the math) to sleep and wake up it would be 800 / 8,000,000 or 0.01% whi..." | Read more » | over 8 years ago | |||
| ggallant | "I think 8 seconds is the "maximum" interval with a 16MHz crystal. You wake up every 8 seconds and can go back to sleep if there is no work to be do..." | Read more » | over 8 years ago | |||
| ggallant | "I'm impressed but I would have been AWED if it had been done with levitation. " | Read more » | over 8 years ago | |||
| ggallant | "What a great article!! " | Read more » | over 8 years ago | |||
| ggallant | "I think the 500ma that can be supplied by the host USB port can be misleading. The spec says it must be able to supply 100ma and can switch to 500m..." | Read more » | over 8 years ago | |||
| ggallant | "Mathew - This is probably the result of a capacitor discharging, C9 is only 0.1uf. I suspect that C14 needs to be much larger (100uf) or add multi..." | Read more » | over 8 years ago | |||
| ggallant | " This is a screen shot of the noise spike when turning on power to the SD card. The yellow signal is the CPU D10 line being used as a sync signal...." | Read more » | over 8 years ago | |||
| ggallant | "I have isolated it to the SD card power turn on. There is 100% repeatable noise spike that is 1.3usec long and drops 1.9V below 3.3V. Trying to upl..." | Read more » | over 8 years ago | |||
| ggallant | "I parked the openscad design files at https://www.dropbox.com/sh/mzp8gketcuqufkq/AADkG_kmo2xcL3iWYOLi4YCxa?dl=0 If there is a better place, such a..." | Read more » | over 8 years ago | |||
| ggallant | "I have decided to suspend my current turbidity sensor and instead adapt yours to my base station. If it is of interest I have modeled the mechanica..." | Read more » | over 8 years ago | |||
| ggallant | "My current led and sensor boards are 6 sided and designed to attach to hardware store 3/4 plugs with plenty of epoxy and silicone sealant. Next rev..." | Read more » | over 8 years ago | |||
| ggallant | "The LED is specified at 100ma. This "should" need a driver transistor. Outputs pins from the CPU are typically rated at 25ma max. " | Read more » | over 8 years ago | |||
| ggallant | "Couple of questions: 1. Is the unit intended for submerged operation? 2. Extended deployment? 3. How is the water cycled to the chamber? 4. What ar..." | Read more » | over 8 years ago |