Recent posts

App note: Introduction to hearing aids and important design considerations

Introduction to hearing aids app note (PDF!) from Maxim: This application note introduces the styles of hearing aids, including behind the ear (BTE), in the ear (ITE), in the canal (ITC), and completely in the canal (CIC), as well as a brief...
Read more

DIY ez-FET lite…ghetto style

Juan Ignacio has published a new build, a DIY ez-FET lite: I have a few MSP430G2955 around but non of my Launchpads are capable of programming this MCU. Texas Instruments released a while back all the informtation needed to build the new ez-FET...
Read more

Free PCB coupon via Facebook to 2 random commenters

Every Friday we give away some extra PCBs via Facebook. This post was announced on Facebook, and on Monday we’ll send coupon codes to two random commenters. The coupon code usually go to Facebook ‘Other’ Messages Folder . More PCBs via...
Read more

ZFM-20 fingerprint capture library

Dilshan Jayakody  writes: This ZFM-20 fingerprint library is developed to capture and retrieve fingerprint images from the above sensor module. The main purpose of this library is to use ZFM-20 sensor with PC as low cost fingerprint capture unit...
Read more

A homebrew Simpleceiver project

Pete Juliano, N6QW, has been working on a DIY Simple-ceiver project. He writes: Today I finished what I call the main board which is comprised of the Mixer stage (SBL-1) followed by the 1st IF Amplifier which is a 12 MHz design consisting of two...
Read more

Macbook charger teardown: The surprising complexity inside Apple’s power adapter

A teardown of a Macbook charger by Ken Shirriff: Have you ever wondered what’s inside your Macbook’s charger? There’s a lot more circuitry crammed into the compact power adapter than you’d expect, including a...
Read more

Happy Thanksgiving!

Happy Thanksgiving to all our USA friends from DangerousPrototypes!  

ESR measurement using multimeter and function generator

Kerry Wong has written an article discussing the measurement of capacitor ESR using a multimeter and a function generator: Capacitor ESR (Equivalent Series Resistance) measurement is very useful in diagnosing issues with power supplies. In linear...
Read more

#FreePCB via Twitter to 2 random RTs

Every Tuesday we give away two coupons for the free PCB drawer via Twitter. This post was announced on Twitter, and in 24 hours we’ll send coupon codes to two random retweeters. Don’t forget there’s free PCBs three times a every...
Read more

Teledyne LeCroy factory tour

Factory tour video of the Teledyne LeCroy factory in  in Chestnut Ridge, NY by Sebastian (a.k.a KF5OBS): Quick look both at & inside the brand new Tektronix TSG4106 6 GHz vector signal generator. They say real beauty lies on the inside and...
Read more