.:madworm:.'s photos

It barely covers the tip of my thumb.

A little knot always helps.

Had to apply some persuasive force.

Intelligent design?

Probably designed to fail there.

This was only for testing, it doesn't really make sense to have remote control here. I sit right in front of it.

It works really well. It implements an IR-to-serial bridge (one way, not transparent). Receive any 38kHz modulated IR signal, process however you like and send serial data out the other end. I use if for remote controlling LED lamps. Total power consumption is 3.6mA in idle mode (20µA for the AVR, a couple of 100µA for the TSOP, about 3mA for the L78L05).

Please forgive me for adding these quotations. At that time I thought it to be funny. What a deranged little mind I have.

I ordered these boards at SeeedStudio about 3 weeks ago. The usual shipping time to me. And that is called air-mail. HAH. I'd really like to know how much of it is caused by delayed customs processing. Instead of creating more jobs for inspectors they make us wait... as if I were ordering illegal stuff like 20mW laser pointers ;-)

I had to turn on 256x averaging to get the noise down.

top: mosfet gate drive (n-fet) bottom: offset inductor votage www.ladyada.net/make/icetube/make.html

Measuring a phase difference seems to work in this case. Although I'm starting to wonder where these '457.925Hz' come from. Looking at the timebase I am led to believe that it should be more 'like 8.89kHz' - something is confused again :-(

Pulse trigger is set to a pulse width of about 7µs, the pulse has 9µs. And it happily triggers. Further research shows that it is always off by about 2µs in this range... It doesn't get any better with sub-µs pulses. Lecroy WaveAce224 - firmware 1.01.01.18R2

This feature is darn finicky. Sometimes I have the feeling it doesn't really work. I try to use it to trigger on rare pulses. You set upper and lower voltage levels + the time in between these. The DSO is supposed to evaluate the average (I think) slope in this zone. Most of the time it doesn't work. When choosing a small voltage window to get a better estimate for the local slope it usually fails to trigger at all. The manual is pretty sparse with information other than "set this to that". The "pulse trigger" function seems pretty 'confused' most of the time as well. The adjust knob for the 'slope time' (as well as hold-off and some other stuff) is a pretty sad thing. It comes with a push-button, but doesn't use it sensibly. Currently one has to keep spinning the button for MINUTES to get from value A to a far away value B. One option would be to use the current time s/div value when pressing the button. That could speed up things considerably. Unfortunately I don't think I will see a firmware update any time soon, as this is the bottom-end range of their scopes, rebranded Chinese product I think. I think I will keep Lecroy support busy for longer than they will desire.