Electronics Design

Keithley Electrometer

Hi, anyone interested in buying a Keithley 619 Electrometer? I can send pics and some simple tests on the lower current...

4 comments posted 4yrs

posted by scotbohnenstiehl

4 comments posted 4yrs posted by scotbohnenstiehl

MUN5333DW1T1G surge current

Hi, I need an array of high-side switches, not more than 50mA per channel. The MUN5333DW1T1G would be handy. Unfortunat...

5 comments posted 4yrs

posted by bombald

5 comments posted 4yrs posted by bombald

roll your own?

I recall working at a company making high precision manufacturing equipment, for semiconductor fabs. At one meeting, an...

2 comments posted 4yrs

posted by r_delaney2001

2 comments posted 4yrs posted by r_delaney2001

Has anyone used the eVNA from Minicircuits

MiniCircuits advertises a eVNA, that consists of a first cut signal processing box, that interfaces via USB cable to a...

4 comments posted 4yrs

posted by dakupoto

4 comments posted 4yrs posted by dakupoto

Triple Charging Gaps to Vegas

I am bringing my Leaf to Vegas for someone to work on. Unfortunately, many mechanics refused to touch anything EV, even...

46 comments posted 4yrs

posted by edward.ming.lee

46 comments posted 4yrs posted by edward.ming.lee

power supply 1-wire remote sense

This ought to work and has some real virtues. https://www.dropbox.com/s/s3swzhh7b0kd8f9/1-wire_sense.jpg?raw=1

33 comments posted 4yrs

posted by jlarkin

33 comments posted 4yrs posted by jlarkin

LTSpice resistive divider

Hi, what has recently happened to my Spice? Below is a simple resistor divider and this is the R2 voltage: https://i.po...

14 comments posted 4yrs

posted by bombald

14 comments posted 4yrs posted by bombald

Spoke sensor for bicycle

I started cycling again (used to as a kid...) some 4 years ago. And while I know there are plenty of super cheap "bicyc...

96 comments posted 4yrs

posted by dp

96 comments posted 4yrs posted by dp

cool power supply

Amazon B09WDCWW36, 60 volts, 5 amps. Set to 59 volts, I get 59.014. Nice display and interface. How can they do this for...

13 comments posted 4yrs

posted by jlarkin

13 comments posted 4yrs posted by jlarkin

alarm clocks

Why is the alarm in an analog mechanical clock louder than a digital clock?

5 comments posted 4yrs

posted by r_delaney2001

5 comments posted 4yrs posted by r_delaney2001

unusual stackup

I want to do a 6-layer pcb like L1 1 oz copper 4 mil fr4 L2 2 oz copper 4 mil fr4 L3 2 oz copper 50 mil fr4 L4 2 oz cop...

13 comments posted 4yrs

posted by jlarkin

13 comments posted 4yrs posted by jlarkin

Power Bank Keepalive

Many consumer grade USB power banks come with a built-in automatic shutdown circuit. Light loads, such as the nominal 6...

21 comments posted 4yrs

posted by g

21 comments posted 4yrs posted by g

4-bit MCU Availability - Again

So anyone have knowledge of truly low cost/low power MCU devices? I found this company. http://upt-ic.com/en/index.aspx...

29 comments posted 4yrs

posted by gnuarm.deletethisbit

29 comments posted 4yrs posted by gnuarm.deletethisbit

4-bit MCU Availability

I remember some folks who discussed very low cost designs that included 4-bit MCUs. At the time, the 4-bit chips were m...

11 comments posted 4yrs

posted by gnuarm.deletethisbit

11 comments posted 4yrs posted by gnuarm.deletethisbit

gps sattelites

Anyone know where a schedule of the times of orbit of the GPS sattelites might be found? Given such data, forecasting a...

40 comments posted 4yrs

posted by ht

40 comments posted 4yrs posted by ht