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White LED driver debugging
The circuit is quite simple. I don't see any obvious place where there could be a problem.   400mA is the approximate internal switch current limit. Hmmmm... Are you seeing 0...
Wednesday, 8 May 2019 - 21:31
Crimper search - Classified Unobtanium
The engineer pa-09 is a universal crimper that *might* work for you. It's handy to have around for infrequent use on those small pitch connectors, but might not be as precise...
Wednesday, 24 April 2019 - 08:19
SMT Soldering
El Tangas wrote: Most hand soldering problems I encounter are solved by adding liberal amounts of flux.   And if that doesn't work, use liberal amounts of hammer......
Friday, 1 March 2019 - 07:57
ZeptoProg AVR Programmer?
That's the old version. There's a newer zeptoprog 2:    https://www.mattairtech.com/index.php/development-boards/zeptoprog-ii.html   I've not used either versions...
Thursday, 28 February 2019 - 10:33
How to cool a small amount of air?
How about an ice chest cooler with a heat exchanger. I've seen a few videos of DIY units. Here are commercial ones:   https://www.icybreeze.com   https://frankencooler....
Friday, 15 February 2019 - 09:59
Need a easy hack to monitor 1.8V
ncv33161 - window comparator with 1.27V reference.   - S  
Tuesday, 5 February 2019 - 09:54
What's the name of this connector?
It's hard to tell from the picture, but it could be a JST-XH - the notches in the socket to the left of it look to be in the right locations for the JST-XH. If you could unplug...
Thursday, 24 January 2019 - 23:39
High Performance soldering station
Thermaltronics makes metcal clones that are a bit cheaper than the metcal equivalents. For example, the tmt-9000s is a mx-500 clone that goes for about USD 400:   https://www...
Wednesday, 2 January 2019 - 03:18
M90E26 Energy Metering IC Power on Reset
You only need to do the calibration measurement and calculation once (e.g. during manufacturing testing). Store that value in eeprom, and on regular power up, just write the...
Saturday, 29 December 2018 - 06:20
Polarizing Film Question
Big clive has a bunch of youtube videos describing his tests with home PCB etching. Toner masks don't give good results. You might get better results with inkjet...
Thursday, 20 December 2018 - 11:40
practical breadboard wiring: headers, fine wire on devices, stripping wire, etc.
dochawk wrote:Particularly, the gauge is too small to push into breadboards without bending. You could try a screw terminal breakout like: https://www.ebay.co.uk/itm/4-way...
Monday, 10 December 2018 - 08:34
12bit DAC enough for ATM quality audio messages?
rammon wrote:Anyway the big question is: is 12bit high enough for such application?   Landline telephone calls use 13-14 bit DACs, sampling at 8ksps. These samples are...
Wednesday, 5 December 2018 - 09:04

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