Archives August 2011

Sunday 28th August 2011 - 19:07:43


A weekend of plumbing and painting. Fun times.

Friday 26th August 2011 - 08:51:39


I am currently working on a door counter. I have based it on the 16f84A (I bought a tube of them years ago before I worked out they weren't really that great). In keeping with the ancient PIC, I found ancient schmitt trigger to debounce. The TP4304. Its stamped '78. I scored a bunch of old CMOS from a closing electronics store.

Sunday 21st August 2011 - 18:22:09


Got lots of work done on my 4 digit multiplexed display. The prototype is up and running with an ADC demo on the pic. It's running 100hz refresh rate with 5hz data refresh rate.

Tuesday 9th August 2011 - 18:02:42

Lots of TG Watchdogs ready to go!

I have had a request to prepare a TG watchdog for installation inside a PC. To do this I am using the router to supply it power (as normal) and I have prepared a ribbon cable to go straight into the mainboards COM IDC header - rather than piggybacking ouside to a D9 socket and back in.

I also had the idea to use the TG watchdog as a means of powering down the box it lives in. Because it is powered externally to the server it lives it, it could reset or power down the system. I have some stuff I bought from mouser - 2 way inline SIL sockets and plugs. I'll have to post photos and part numbers. You could make a wedge cable to short the power or reset pins on the mainboard while leaving the button function intact.

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