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MEP EP#240: Disturbed Solder AccuracyParker
Got a fully automatic screen printer!
ESE US-2000X
Potentially lower our minimal paste size
Twitch Live Stream podcasts?
Amazon multimeter probes
Stephen
High voltage low current measurement
Don't want to break the connection so a traditional ammeter isn't going to work
Sticking with the read both sides of a resistor method
Caddock 1776-C681 high voltage high resistance high tolerance divider
1/100 so 0 to 500v becomes 0 to 5v
ADC - MCP3551-E/SN
22 bit
SPI
2.4 meg ohm input impedance
Ideally the voltage divider has a “gain” of 0.01 but if the ADC is directly attached to the divider the gain is around 0.0096
Full scale would be 4.8V instead of 5V
Solution: add a buffer
AD8244BRMZ
Quad buffer
Typical offset voltage of 100uV
Gain error of 0.03% max on +/-15v rails
10T ohm and 4pf input resistance/capacitance - 10^12
Gain error is now 0.009999999901 - Close enough
Show Notes
MEP EP#240: Disturbed Solder Accuracy
Parker
- Got a fully automatic screen printer!
- ESE US-2000X
- Potentially lower our minimal paste size
- Twitch Live Stream podcasts?
- Amazon multimeter probes
Stephen
- High voltage low current measurement
- Don't want to break the connection so a traditional ammeter isn't going to work
- Sticking with the read both sides of a resistor method
- Caddock 1776-C681 high voltage high resistance high tolerance divider
- 1/100 so 0 to 500v becomes 0 to 5v
- ADC - MCP3551-E/SN
- 22 bit
- SPI
- 2.4 meg ohm input impedance
- Ideally the voltage divider has a “gain” of 0.01 but if the ADC is directly attached to the divider the gain is around 0.0096
- Full scale would be 4.8V instead of 5V
- Solution: add a buffer
- AD8244BRMZ
- Quad buffer
- Typical offset voltage of 100uV
- Gain error of 0.03% max on +/-15v rails
- 10T ohm and 4pf input resistance/capacitance - 10^12
- Gain error is now 0.009999999901 - Close enough
Creators & Guests
What is Circuit Break - A MacroFab Podcast?
Dive into the electrifying world of electrical engineering with Circuit Break, a MacroFab podcast hosted by Parker Dillmann and Stephen Kraig. This dynamic duo, armed with practical experience and a palpable passion for tech, explores the latest innovations, industry news, and practical challenges in the field. From DIY project hurdles to deep dives with industry experts, Parker and Stephen's real-world insights provide an engaging learning experience that bridges theory and practice for engineers at any stage of their career.
Whether you're a student eager to grasp what the job market seeks, or an engineer keen to stay ahead in the fast-paced tech world, Circuit Break is your go-to. The hosts, alongside a vibrant community of engineers, makers, and leaders, dissect product evolutions, demystify the journey of tech from lab to market, and reverse engineer the processes behind groundbreaking advancements. Their candid discussions not only enlighten but also inspire listeners to explore the limitless possibilities within electrical engineering.
Presented by MacroFab, a leader in electronics manufacturing services, Circuit Break connects listeners directly to the forefront of PCB design, assembly, and innovation. MacroFab's platform exemplifies the seamless integration of design and manufacturing, catering to a broad audience from hobbyists to professionals.
About the hosts: Parker, an expert in Embedded System Design and DSP, and Stephen, an aficionado of audio electronics and brewing tech, bring a wealth of knowledge and a unique perspective to the show. Their backgrounds in engineering and hands-on projects make each episode a blend of expertise, enthusiasm, and practical advice.
Join the conversation and community at our online engineering forum, where we delve deeper into each episode's content, gather your feedback, and explore the topics you're curious about. Subscribe to Circuit Break on your favorite podcast platform and become part of our journey through the fascinating world of electrical engineering.