Post Created date
Opto Couplers
Optocouplers in SOIC are not uncommon.
Saturday, 19 July 2014 - 15:11
Why keep solder paste cold?
Dried paste reconstitutes well with isopropyl. It also helps to thin it out when using a syringe with a small tip.
Thursday, 3 July 2014 - 04:49
WiFi module recommendations
Quote:Your link returns as 'Not Found' Good thing, it's on my LAN, hence local. I started the project with a sparkCore, an Arduino compatible ARM with a CC3000 wifi module. But...
Wednesday, 2 July 2014 - 03:16
WiFi module recommendations
I built a REST API a few weeks ago with an $11 Arduino, an $8 Ethernet shield and a $13 Wifi AP. Ebay of course. And I used the Bonjour/Zeroconf library to map the DHCP assigned...
Wednesday, 2 July 2014 - 02:08
Measuring Ultrasonic Piezo Transducer's Resonant Frequency?
Some time ago I worked with a 200w ultrasonic transducer, measuring both current and phase angle to deduce the resonate frequency. There is a little documentation here: http://...
Saturday, 31 May 2014 - 15:25
Reflow oven first tests with questions...
If it's got the glowing quartz heaters, you want to shield the PCBs from direct radiation and rely on convection heating. Tin foil works as well as it does for hats.
Sunday, 25 May 2014 - 22:08
PID controller question
Also helpful, to avoid derivative kick, compute the D component as a difference of position and not as a difference of error. Velocity = ( LastPosition - CurrentPosition );...
Thursday, 8 May 2014 - 20:29
Laser cutter
MasterCAM has a very steep learning curve. There are lots of cheaper and simpler options, CamBam for example.
Wednesday, 7 May 2014 - 13:52
Useful looking adjustable power supply with display.
It should be 4-38V. Both of those are cheaper on eBay, the adjustable ones are really useful, someone is always asking for a specific supply voltage or wanting to run something...
Sunday, 27 April 2014 - 23:46
Need help on sensor.
Capacitive sensing is so very simple, it's just timing the rise or fall of the capacitor/electrode through a constant resistance. Tau = R*C http://playground.arduino.cc/Mai...
Tuesday, 22 April 2014 - 14:31
DC-DC converter output voltage
Quote:Sorry, what do you mean "CC" ??? Constant current.
Thursday, 17 April 2014 - 20:52
DC-DC converter output voltage
Seems like a fun challenge. How are the other ic's connected? If i2c you could be clear to mix voltages maintaining the pullups are on the lower side... You could CC the LEDs for...
Monday, 14 April 2014 - 19:14

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