Search found 6 matches

by tbruylan
Sun Sep 23, 2018 9:17 am
Forum: Discuss!
Topic: Troubled waters
Replies: 36
Views: 4879

Re: Troubled waters

Just my 2 cents. I bought the DM42 for multiple reasons (few months ago). One of these reasons was exactly the fact that it has an open-source firmware. This, to me, means that I can always dig in and fix issues myself (as a software developer) if ever needed. I've been looking for years to get a go...
by tbruylan
Tue Sep 18, 2018 6:08 pm
Forum: Hardware issues
Topic: Battery life
Replies: 18
Views: 1343

Re: Battery life

So, I received a replacement (a brand new DM42). To verify, I measured the standby current of this new DM42, and it consumes a perfect low 3.4uA.
IMG_4943.jpg
IMG_4943.jpg (101.31 KiB) Viewed 71 times
SwissMicros is really taking a no-nonse approach as advertised. Their service is great, as are their products :) Thanks.
by tbruylan
Mon Sep 10, 2018 10:14 am
Forum: Hardware issues
Topic: Battery life
Replies: 18
Views: 1343

Re: Battery life

Well, as stated in my post, it is running DMCP 3.9a and it is consuming 420uA in OFF state.
by tbruylan
Mon Sep 10, 2018 10:05 am
Forum: Hardware issues
Topic: Battery life
Replies: 18
Views: 1343

Re: Battery life

I made some power measurement (see attached screenshots). Connected the calculator to a 3.00V power supply with Imax set to 20mA, and in series a precision multimeter to measure the current in uA range. The calculator boots fine. It runs DMCP 3.9a and PGM 3.9.1 dm42_about.jpg . Current draws measure...
by tbruylan
Sun Sep 09, 2018 3:33 pm
Forum: Hardware issues
Topic: Battery life
Replies: 18
Views: 1343

Re: Battery life

Hi, not sure if still relevant, but I have the same issue. Put in a fresh battery (tried Panasonic and Varta) and it drains in about 3 to 4 weeks. Is this the expected lifetime of a battery, or is something wrong? Calculator usage is also limited to a few minutes per day max. A few is... how many? ...
by tbruylan
Tue Sep 04, 2018 5:43 pm
Forum: Hardware issues
Topic: Battery life
Replies: 18
Views: 1343

Re: Battery life

Hi, not sure if still relevant, but I have the same issue. Put in a fresh battery (tried Panasonic and Varta) and it drains in about 3 to 4 weeks. Is this the expected lifetime of a battery, or is something wrong? Calculator usage is also limited to a few minutes per day max.