You can easily replace any chip crystal circuit with a dedicated external crystal oscillator. Reducing your BOM count, and making your design easier, smaller, and potentially more robust. Cyber City Circuits: https://www.youtube.com/@cybercitycircuits https://twitter.com/MakeAugusta/status/1788651197055827992 Forum: https://www.eevblog.com/forum/blog/eevblog-1614-circuit-design-tip-crystal-oscillators ..read more

Apple just released the new iPad Pro M4. Normally I wouldn’t care, but it’s about Engineering vs Marketing, and we can run some numbers, so let’s dive in. What can engineers do with an extra mm in thickness? How about double the battery capcity? Better repairability would have been nice too! Featuring DaveCalc. https://twitter.com/peteoxenham/status/1788016699477983699 Forum: https://www.eevblog.com/forum/blog/eevblab-118-new-ipad-pro-volumetric-engineering-vs-marketing ..read more

Simple repair on the neighbours $4500 Audiophile Chord Hugo DAC. Replacing the rechargeable lithium ion batteries wasn’t quite as simple as expected though… And is this thing worth $4500? Forum: https://www.eevblog.com/forum/blog/eevbog-1613-audiophile-repair-chord-hugo-dac ..read more

Siglent SDS1000X HD 12 bit Oscilloscope Teardown and brief play, noise measurement, and comparison to the SDS2000X HD Hires photos: SDS2000X HD Teardown: https://www.youtube.com/watch?v=lUAevbBh0rQ Forum: https://www.eevblog.com/forum/blog/eevblog-1612-siglent-sds1000x-hd-12-bit-oscilloscope-teardown/ 00:00 – Siglent SDS1000X HD 12 bit Oscilloscope 00:39 – Unboxing problem… 01:21 – For the film afficionardoes 01:31 – Brief look over 04:33 – Comparison to SDS2000X HD 05:17 – Teardown 07:26 – PSU differences 09:17 – Main PCB comparison to 2000X HD 12:35 – Front End comparison 14:56 – Cooling 1 ..read more

The TOP 5 Jellybean 7440 and 4000 series logic chips. Forum: https://www.eevblog.com/forum/blog/eevblog-1611-top-5-jellybean-7400-4000-logic/ Schmitt Trigger video: https://www.youtube.com/watch?v=Ht48vv0rQYk 00:00 – Top 5 TTL and CMOS Jellybean chips 00:37 – Different 7400 series family types 01:52 – What makes a Jellybean component 3:27 – CD4051 / CD4052 / CD4053 Analog Multiplexer Switch 17:42 – 74HC595 8 Bit Latched Shift Register 20:58 – Used in the MXO4 oscilloscope 24:09 – Driving LED’s 26:12 – 74HC74 Dual D Flip Flop 27:00 – Used in the Rigol HDO1000 Oscilloscope 28:14 – Uses for a D ..read more

A lot of texbooks don’t teach Composite Amplifiers, but they are one of the most used circuit configurations to solve real world design poblems where you have multiple conflicting specifications. Opamp Tutorial Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHu2FviAaZaiyXwN41G4b1Lf Cascaded Compound Amplifiers: https://www.youtube.com/watch?v=ZvT9hHG17tQ Forum: https://www.eevblog.com/forum/blog/eevblog-1609-composite-amplifier-tutorial-practical-demo/ 00:00 – Composite vs Compound Amplifiers 02:53 – How a Composite Amplifier works 05:09 – Why not just cascade them? 07:23 – This do ..read more

More mailbag! 00:00 – Jumperless Breadboard from Architeuthis Flux & WokWi https://www.tindie.com/products/architeuthisflux/jumperless/ https://hackaday.io/project/191238-jumperless/log/222858-getting-started-using-your-jumperless https://wokwi.com/ https://www.digikey.com/en/maker/projects/jumperless/2e62cc88ee6145bc924041dd486de76f https://theamphour.com/599-an-interview-with-uri-shaked-wokwi-com/ 08:42 – Trying the software, it didn’t go so well… 21:20 – Automated probe connection function 22:35 – My old IC Tester project 23:32 – 16TB Hard Drive 25:26 – Modius Headband: Induce sickness ..read more

Physically vibrating your power supply at a sub harmonic of your PSU switching frequency can potentially lower your system noise. A practical demonstration. AlienTek DP100: https://s.click.aliexpress.com/e/_DeWCLIN Forum: https://www.eevblog.com/forum/blog/eevblog-1607-psu-switching-noise-reduction-via-vibration/ Linked videos: Tesla AI PSU problem: https://www.youtube.com/watch?v=YIbQ3nudCA0 Vibration coherence: https://www.youtube.com/watch?v=uus_cpZiqsU Vibration testing: https://www.youtube.com/watch?v=1Y2L6QLOi-c AlienTek DP100 PSU: https://www.youtube.com/watch?v=Pd6LG7iP2GQ Ceramic Cap ..read more

AlienTek DP100 100W USB-C PSU REVIEW https://s.click.aliexpress.com/e/_DeWCLIN PSU Noise measurement: https://www.youtube.com/watch?v=G8Qoj3TpO9A Forum: https://www.eevblog.com/forum/blog/eevblog-1606-$45-alientek-dp100-100w-usb-c-psu-review/ 00:00 – AlienTek DP100 100W USB-C PSU Unboxing 02:43 – Power on and operation 08:57 – User Manual 10:01 – Trying USB-C source 10:44 – Setting Menu 12:00 – uSupply Inception 12:55 – Physical size comparison 13:16 – Teardown 14:44 – PCB Inspection and design analysis 18:14 – BOM Consolidation & MOSFET’s 19:15 – USB Power Delivery Chip 20:46 – MP9928 Bu ..read more

Dave is chasing fart noises in this JBL Charge 3 waterproof speaker. A teardown, and powerup on the bench to find the mysterious fart noises. Will it get repaired, or will the fault do a Harold Holt? Part 2: https://www.youtube.com/watch?v=u7sVGnrf0P0 Forum: https://www.eevblog.com/forum/blog/eevblog-1605-chasing-fart-noises-jbl-charge-3-repair/ 00:00 – JBL Charge 3 Waterproof Speaker Fault 02:17 – Teardown 07:13 – Drivers 08:16 – Passive Radiators 09:58 – The Case Moulding 10:46 – Main PCB 11:36 – Under the microscope 15:30 – What’s this Power Rail doing? 18:07 – Power Rail Capture 20:16 – A ..read more