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Reflow with hot air gun or kitchen oven?
I have a Toyota key fob that seems to have a dry joint or similar. It only works if I twist the PCB slightly. Since these things cost hundreds to replace, is there any mileage in...
Tuesday, 30 July 2019 - 09:55
PIC programming
I expect I'll be Blynched, but here goes anyway... It's all the same happy bunch of pals company now, right? An old client of mine has a bunch of PCBs that I designed several...
Friday, 22 March 2019 - 13:27
Strange Alexa Bluetooth problem.
My wife's Echo dot is usually connected via Bluetooth to a little BT receiver that plugs into the aux input of our dining room "HiFi".   After it's been connected for some...
Friday, 8 March 2019 - 11:12
XMEGA-A3BU XPLAINED yours for postage.
Found this whilst looking for something completely different. I'm probably never going to use it, so yours for postage cost(which I guess limits it to UK).  
Saturday, 2 March 2019 - 14:48
Hi side FET switch for low voltage
I'd like to switch the power to a small OLED display, it draws under 50mA, could be a lot less, but depends on active pixels. It is, however, too much for me to supply the Vdd...
Friday, 18 January 2019 - 08:00
1 inch fuse
I blew the fuse on my trusty multimeter. Nothing in my RS fuse selection box from 35 years ago(starts at 1A). The only place I can find 1" by 1/4" 500mA quick blow is Farnell, who...
Tuesday, 27 March 2018 - 12:24
Strange failure mode of toothbrush
My electric toothbrush used to have two speeds, press once for slow, twice for fast, a third time for off. Now it goes from off to fast to off. It's not likely to be switch bounce...
Saturday, 20 January 2018 - 14:55
How to: power consumption of intermittent, spikey projects
Seriously, how do y'all work out power consumption of interrmittent, spikey projects? I generally use one of two methods: a) Measure the running current by disabling the sleep,...
Wednesday, 6 December 2017 - 08:58
Diode pump voltage doubler to drive FET
I'm trying to drive an N channel FET from a Mega328 running on 3V (8MHz). I'm having trouble finding any through hole mounting device that will turn on properly at 3V. Since I don...
Friday, 13 October 2017 - 17:29
What voltage would you expect to see on a ceramic resonator?
I have a 24mHz resonator on a micro(not AVR, actually Kinetis) and the waveform is roughly 480mV peak to peak. Is this what you'd expect? I'm having trouble whereby as soon as I...
Friday, 7 October 2016 - 10:54
AVRISP MK2 stopped working.
For many years, I have used a few batch files to program ATTiny44 chips for a client. Every now and then he asks for 50 or 100, and I program them and forget about them for a few...
Wednesday, 18 May 2016 - 18:20
Guitar jack to line levels.
I know there are a few axemen on these forums, so... Anyone point me at a simple circuit to convert an electric guitar output to standard line in level? Preferably working from 3...
Friday, 18 December 2015 - 10:18