EnviroDIY | Khaase | Activity https://www.envirodiy.org/members/khaase/activity/ Activity feed for Khaase. Wed, 15 Apr 2026 12:04:57 -0400 https://buddypress.org/?v= en-US 30 hourly 2 6230ad8a4451cc956745075505d91e0a Khaase replied to the topic Mayfly 1.1 Bootloader Burning? in the forum Mayfly Data Logger https://www.envirodiy.org/topic/mayfly-1-1-bootloader-burning/#post-17510 Thu, 29 Dec 2022 14:00:54 -0500 An update: I got the Tag Connect socket and it works fine on my Pololu Atmel ICSP programmer, and using it burning bootloaders and program Mayflys is fast and fun.

I am still sorting through my test results and will probably have to do a new battery of tests with an external datalogger because the internal ADC gets confused by low voltages, but…[Read more]

]]> 32d7430e5b17478da8160c3ee356d3d1 Khaase replied to the topic Primary powering in cold settings in the forum Infrastructure and Equipment https://www.envirodiy.org/topic/primary-powering-in-cold-settings/#post-17509 Thu, 29 Dec 2022 13:49:04 -0500 So far, your super-capacitor idea is holding up pretty well for me. A 100 uF capacitor buffered voltage sag to a degree, but the 10,000 uF supercap (1/10 the voltage rating and 1/2 the size) gets our setup able to use any given battery voltage measurement without having to consider if the sensors are on or not. (I want to write “Battery voltage…[Read more]

]]> 383dbb394181d5c81f29df7fe8fe98fe Khaase replied to the topic Mayfly 1.1 Bootloader Burning? in the forum Mayfly Data Logger https://www.envirodiy.org/topic/mayfly-1-1-bootloader-burning/#post-17464 Thu, 24 Nov 2022 19:03:49 -0500 I ordered the cable. FWIW The folks that run Tag-Connect are very friendly!

]]> 243118ae2d5d01b6120d6173d592fab1 Khaase replied to the topic Primary powering in cold settings in the forum Infrastructure and Equipment https://www.envirodiy.org/topic/primary-powering-in-cold-settings/#post-17463 Thu, 24 Nov 2022 18:58:16 -0500 I’ve been testing with Mayfly 1.1 and LiSOCl2 D batteries. Our package is using a Mayfly 1.1, and SD card, and a sensor on the switch power that pulls ~350 mA in pulses when its on.

I initially tried using 1S4P configuration with 95sq015 protection diodes with the intent of preventing heating from cell imbalances. That puts the Vin at about 3.4…[Read more]

]]> c7b08e677416862197528970e47d6814 Khaase replied to the topic Mayfly 1.1 Bootloader Burning? in the forum Mayfly Data Logger https://www.envirodiy.org/topic/mayfly-1-1-bootloader-burning/#post-17459 Mon, 21 Nov 2022 12:42:19 -0500 Thank you for the link. I was googling for pogo pin grids, what a nifty widget.

]]> aa5cd797b337416d07d86770cbf1b52b Khaase replied to the topic Mayfly 1.1 Bootloader Burning? in the forum Mayfly Data Logger https://www.envirodiy.org/topic/mayfly-1-1-bootloader-burning/#post-17447 Tue, 15 Nov 2022 13:48:19 -0500 I probed the traces to the vertical uSD socket and FTDI and determined that with the isolation capacitor and DTR, it’s not possible to update the bootloader from uSD/J7. Of course, Right there on the circuit diagram there is an ICSP port (H4), which is a set of pads for what I believe are 1.94mm pogo pins by the uSD slot. I wonder if there is a…[Read more]

]]> 092a73e65111424b6ef93c3e4cd1982f Khaase replied to the topic Mayfly 1.1 Bootloader Burning? in the forum Mayfly Data Logger https://www.envirodiy.org/topic/mayfly-1-1-bootloader-burning/#post-17433 Mon, 07 Nov 2022 14:05:55 -0500 That is useful, and along the lines of my thinking: moving to LiSOCL2. Though I am having trouble getting supplies to test. The internal impedance of those, especially when low or cold, is a big question. My system can use all the deep-sleep tricks, but when measuring the load spikes up to ~350 mA for fractions of a second, and I wonder if this…[Read more]

]]> dd4ec0d4ab28fdf3496cf6f966a59a20 Khaase started the topic Mayfly 1.1 Bootloader Burning? in the forum Mayfly Data Logger https://www.envirodiy.org/topic/mayfly-1-1-bootloader-burning/ Sun, 06 Nov 2022 18:14:15 -0500 I haven’t seen a discussion about burning a bootloader to the Mayfly 1v1. I presume the best way to so go through J7 with my ISP.

Is there any special guidance? How is this done during assembly?

The reason I am messing with the bootloader is that I’m trying to get Mayflys to live off some big batteries for a project in a cold dark place for a…[Read more]

]]> 5f1cf3bbd9db627da7750584c0c87974 Khaase became a registered member https://www.envirodiy.org/activity/p/8369/ Sun, 06 Nov 2022 17:59:35 -0500 0