Today’s vintage entry is rather cute:
Today’s teardown subject is another vintage find: a 1974 Casio Personal-Mini.
Today’s topic is somewhat unique- a vintage optical mouse, made in the days when it was not very trivial. It’s not like you can just slap a camera in and have it take pictures to figure out where things move. In the old days you had to actually design it, maybe even using some 2N3906 and 555 timers as we’ll find out. Let’s start with unboxing (pardon the masking tape holding things together)
Today’s post is a bit of a challenge to myself- what (if anything ) can be learned from analyzing a simple thing like a garage opener button wall button?
This one has been sitting since the summer- it took a while to get all the rain to evaporate from the inside! When I grabbed the pour fella, it had water up to the mirror.
Today we have a somewhat vintage teardown. Even though you can still buy this Watchdog BWD-HWA Water Alarm in home stores and online, the design itself probably goes quite a few decades back as we’ll see below. We’ll also learn a few things about low power design. Rumor has it these last forever on a nine volt battery!
I’ve been lucky enough recently to score a Keithley 2304 power supply off ebay for a measly $75. For those unfamiliar, these are high speed battery simulator units capable of measuring very low currents and also behaving like a battery and sinking current.
It’s been a while since we’ve fixed anything. But no worries- something always breaks around here! Lately, our fancy electrical dryer decided to call it quits. Continue reading