May 3, 2010
News - According to Pete #41: Bo…
about 6 days ago
Or modulate the voltage supply to your RF carrier oscillator. Not pretty but you’ll get an AM signal out!
An early AM transmitter, built by Reginald Fessenden at the dawn of the last century, did it with an ordinary carbon microphone (taken from a telephone handset) in series with an AC signal (from a generator at 50KHz). Scary stuff. Did I mention the microphone was water cooled? Don’t try this at home…
Enjoy your video tutorials - keep them coming!
BTW, you said “That’s really good, that’s better than a linear regulator” (at time code 9:11)
How does a linear regulator boost the output voltage? Perhaps your head was still in BUCK regulator thinking?
News - Enginursday: CES, You sho…
about a month ago
Here’s a DIY Automatic Guitar Tuner
Don’t bet on it. Personal Mobility Scooters rentals were everywhere. Kind of silly letting them roll into our booth and get stuck there…
You survived “CES 2015”! Spent all my CES week running demos (my employer’s booth was on the Central Plaza).
I regret not visiting the Sands during my breaks. Bet the 3D printers and Drones got a bigger WOW factor than those 4K and 8K video “monsters” seen in the Central Hall
I didn’t count my CES footsteps…. Arthroscopic knee surgery just one week after CES 2015 has me thinking twice about next year!
News - He's Back! "Accordin…
about 3 months ago
Thanks! If nothing else you’ve got me interested in using the partsim tool. BTW, 600uA gives a VCM output of 7.55V
Thanks for sharing your sims! Your upper transistors are very close to saturation - you won’t get much output swing, but you will enjoy much distortion (grin).
Better to change the bias to make the common-mode output voltage closer to the mid-point (say, 7.5V in this example). For the 8k2 collector loads that requires about 300uA in each side. The ‘tail current’ should therefore be 600uA not 1.17mA as show. I’m not a PartSIM user (prefer PSICE), can you run a fresh sim to confirm?
News - Your November Caption Con…
about 4 months ago
Sparkfun “BigTime Watch Kit” - combining Military performance with some old magic!
The latest BigTime Watch Kit undergoing field trials
The start of the “Bring a Senior to Work Day” campaign.
No public wish lists :(
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