DIY

Blowtorch SMD Reflow

Blowtorch SMD Reflow

[whitequark] has been experimenting with a blowtorch for SMD reflow. Having just moved 8,000 km [whitequark] was stuck without any of the usual reflow tools. They did however have a blowtorch handy, and gave it a go. When [whitequark] mentioned attempts on Twitter, we figured the results would mostly involve […]

Circuit Design? Spread the Joy

Circuit Design? Spread the Joy

Accountants and MBAs use spreadsheets to play “what if” scenarios with business and financial data. Can you do the same thing with electronic circuits? The answer-perhaps not surprisingly-is yes. Consider this simple common emitter amplifier (I modeled it in PartSim, if you’d like to open it): In this particular case, […]

[CNLohr]’s Glass PCB Fabrication Process

[CNLohr]’s Glass PCB Fabrication Process

One of [CNLohr]’s bigger claims to fame is his process for making glass PCBs. They’re pretty much identical to regular, fiberglass-based PCBs, but [CNLohr] is building circuits on microscope slides. We’ve seen him build a glass PCB LED clock and a Linux Minecraft Ethernet thing, but until now, [CNLohr]’s process […]

Tearing into Delta Sigma ADC’s

Tearing into Delta Sigma ADC’s

It’s not surprising that Analog to Digital Converters (ADC’s) now employ several techniques to accomplish higher speeds and resolutions than their simpler counterparts. Enter the Delta-Sigma (??) ADC which combines a couple of techniques including oversampling, noise shaping and digital filtering. That’s not to say that you need several chips […]