Here is an all-analog, all-through-hole, cheap & cheerful preamplifier for that perennial problem of getting the microphone amplification just right, which is a challenge not only with the faithful reproduction of lead vocals during concerts and recordings, but also with campfire and karaoke-ish performances specially when the beer takes hold. The two operational amplifiers of […]
KaraOkay Microphone Amplifier Read More »
Have you ever wanted to wirelessly control power outlets from your phone? You could buy a Belkin WeMo Switch for over $40 for 1 outlet or build your own with 5 outlets for under $35 if you already own a Raspberry Pi. Hopefully this post will guide you in the right direction. Hardware Needed: Etekcity 5 Pack (Try
Wireless Power Outlets RF from Raspberry Pi Read More »
Motivation I was building some Lo-Fi CMOS synthies, just like the ones you see here: http://hackaday.com/2015/02/04/logic-noise-sweet-sweet-oscillator-sounds/ or here: http://www.nicolascollins.com/hackingtutorial11.htm Soon after I played around with some simple sequencers and multiplexers to generate more complex sound patterns. I thought it would be cool to have a device to gate oscillators or switch multiplexers with a random
clocked 8-bit random pattern generator for CMOS synth Read More »
PORTLAND, Ore. — The world’s first micro electro mechanical system (MEMS) spectrometer on-a-chip was shown today at at Photonics West (San Francisco, February 10-12) by Si-Ware Systems (SWS, Cairo, Egypt with offices in La Canada, Calif.) Instead of transporting materials across sometimes great distances to be analyzed with a normal bench-top spectrometer, Si-Ware’s MEMS-powered spectrometer
World’s 1st Spectrometer On-a-Chip Read More »
Last week I had the idea to create a last-minute valentine’s day gift for my girlfriend. I had a bunch of WS2812 LEDs from my previous endeavors and decided to make a big LED heart. These are a great choice because of the very minimal amount of components necessary: no I/O expanders, driving transistors or
A Valentine’s Day Surprise Read More »
When I made the PCB for the stand-alone inductance meter, I erroneously used a SSOP footprint for the microcontroller (instead of the desired SOIC). The PIC is available in a SSOP package (PIC16F1963-I/SS instead of PIC16F1936-I/SO) but I didn’t have any at hand so I simply made a new board with a SOIC footprint. Apart from the footprint, the
Stand-alone Inductance Meter Read More »
Features Wide Operating Input Voltage Range: 4V to 140V Internal Low Resistance Power MOSFET No Compensation Required Adjustable 100mA to 400mA Maximum Output Current Low Dropout Operation: 100% Duty Cycle Low Quiescent Current: 12μA Wide Output Range: 0.8V to VIN 0.8V ±1% Feedback Voltage Reference Precise RUN Pin Threshold Internal or External Soft-Start Programmable 1.8V, 3.3V,
LTC7138 – High Efficiency, 140V 400mA Step-Down Regulator Read More »
FTDI „Embedded Video Engine“ (EVE) platform may be familiar to you from our article like „Be in plus with a graphic platform FTDI VM800P “. FT800, as a powerful graphic platform with minimum requirements for a host MCU will meet your requirements with a high probability. Into the final application, you´ll probably use only the
Immediately available TFT modules with capacitive touch panels Read More »
The Chebyshev filter features a steep roll-off, but has ripple in the pass band, so it is not suited for audio signal use, where a flat response is ideal. The roll off is so fast that the common definition for cut-off frequency does not work for Chebyshev filters. For this type of filter the cutoff
1kHz Chebyshev Filter Read More »
Precise heat sinks from the production of Fischer Electronic will take care for your devices to stay “cool”. Over 40 years of experience of company Fischer reflect in an excellent reputation and mainly in a stable high quality of their products. Main production portfolio consists of heat sinks, connectors and enclosures. Narrow specialization on mechanical
Leave an excess heat to Fischer heat sinks Read More »
