$2 for 10 PCBs & $6 for a SMT Stencil: https://jlcpcb.com
Hello everyone and welcome to a new Voltlog, Today I’m discussing the blitzwolf night light which is a good example of bad product design because of it’s high standby current.
Blitzwolf Night Light BW-LT9 http://voltlog.com/y/le2uv
Baofeng BF-T3 Radio
Holtek BS84B06A-3 Datasheet http://voltlog.com/y/1gdny
BL4054 Datasheet http://voltlog.com/y/hpioj
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Too bad case is glued, if it was simpler to disassemble without damaging it that could be nice platform for hacks, such as microcontroller replacement with PIC or Atmel. Or even reprogramming that stock microcontroller if it's not OTP.
wow that mcu has 3k flash and 256+ ram, waay overkill for what it's doing... even a 1k flash, 128 ram would be more than enough!
surprised the didnt put a 0.03 USD "padauk" mcu (see eevblog videos on this)... too bad they didnt use STC micros - those are really easy to reprogram as they have built in uart rom bsl and can compile w/ sdcc
It sounds like a software issue and maybe there's a good shot at altering the code, by adjusting the current output control within the chips internal LED driver which has four segments to work in, allowing the chip to work as intended, yes/no/maybe?
I think it's a combination of software + hardware issue and I think it's possible to optimize the design but I don't think it has anything to do with the LEDs. It's about he microcontroller not being put into a low power mode(sleep), I think it's active all the time and it could also be a case of a cheap dc-dc converter which is not very efficient.
yes, the hard on/off switch cuts power but I got the lamp because of the touch option which I can operate easily with one hand, without much precision. If I have to slide that switch, I would need to use two hands and I don't like it anymore.
Good Product Design, because you (and many others) buy this. That's the intention of doing product design, right?
The power is consumed because of the always running touch sensor (as you said). Would more people buy it with an ordinary switch? I don't think so, even though with a mechanical switch it would be easy to reduce the standby current to nano amps.
the design actually has a hard switch which will cut power completely, eliminating the power drain issue but I got the lamp because of the touch option which I can operate easily with one hand, without much precision. If I have to slide that switch, I would need to use two hands and I don't like it anymore. as a night stand lamp.
Marin Community Foundation and Asian Americans/Pacific Islanders in Philanthropy.
Overall, US-born Muslims make up the largest percentage at 34% of all Muslims in the Bay Area, followed by 14% born in Pakistan, 11% in Afghanistan, 10% in India, 3% in Egypt and 2% each in Iran, Jordan, Palestine and Yemen.
Silicon Valley Pakistani-American by the Numbers:
There are 35,000 Pakistani-born Muslims in San Francisco Bay Area, or 14% of the 250,000 Muslims who call the Bay Area home, according to the study. Bay Area Muslim community constitutes 3.5 percent of the area’s total population and is one of the highest concentrations of Muslims in the country.
As of 2013, South Asian Muslims, including Pakistanis, have the highest income levels, with nearly half (49%) of them having a household income above $100,000. In comparison, those groups with the lowest proportion of household incomes above $100,000 were Hispanic Muslims (15%), Afghans (10%), and African American Muslims (10%).
The Bay Area Muslim community is very diverse in terms of race and ethnicity:
South Asians (30%)
African Americans (9%)
Asian/Pacific Islanders (7%)
Based on the survey findings, the majority of Muslims live in the following three counties:
and Contra Costa (12%)
Thousands of Pakistan-born techies are working at Apple, Cisco, Google, Intel, Oracle and hundreds of other high-tech companies from small start-ups to large Fortune 500 corporations. Pakistani-Americans are contributing to what Erik Brynjolfsson and Andrew McAfee describe as "The Second Machine Age" in a recent book with the same title.