RF pulse generatorshield for arduino UNO.Frequency goes from 1.5 MHz to 2.5 MHz (filter can be changed)Minimum pulse width of 5 us and minimum repetition delay of 200 ms.The output is fixed to 1V but R4 can be updated to a potentiometer.Please refer to dayspringTECH designs when use it.

More than one year ago I discover secret signals from our cell towers that emits V2K (Voice to sKull) technology. Our government making psi-terrorism from towers. I record that signals from many cell towers using RTL-SDR. And popularise them on youtube, socials and my own site. If you give me discount I will show your shop and all of your stuff. And will recomend everywhere. I have more than 20 000 subscribers.I live in deep Tajga forest half-abandoned village Bajkal without money already 10 years. Because government treats me for my researches and activism. And even Youtube sometime blocking my channel. May be you know that we are colony since 1991 as loosed cold war. And here is total thieves rejeem with genocide most of people. All my money is little donations for tools and spare parts.Thank you and glad to meet! With best wishes!I am electronic engineer since 1988. Begin to learn EMI fields around at february 2019 when in our and other villages mount cell towers. But cell network become even worst.Then I making my own hand-made RF detector with grafic based on oscilloscope. I was really surprised to see sinusoidal signal from our towers.Then I make spectrogram and my own program on Lazarus and see that there is net of sinusoids with frequency up to 18Hz with 3Hz step. Most powerful sinus has period 400sec and freq=0.0025Hz.Then I begin study brain waves EMI and found lots of patens about V2K technology - voice to skull on morethansnowden.com site.I start recording from towers with my detector. Sometime it looks like very noisy impulsed homan voice.And our new towers doesn't detect by our cell phones because they even hasn't Cell-ID number. In fact they emit EMI on 900MHz modulated by low and extra-low frequencies.That why I am almost one year search serious meter and define that only yours EMF-390 will help me to separate that new V2K towers from other cell towers.Only your meter have specrum analizer and logger, USB console connection for future experiments.But Russian government don't need engineers. And thousands of them living without work.I live in Tajga forest between Novosibirsk and Tomsk without work and money already 10 years by natural habitate. All donations I spend on spare parts for projects and hold some for your meter.Now I collect about $150 but our currency rouble falls past week and I lost about $30. Can You give me some discount? Exchanged with my professional advertisment.I will make full review of EMF-390 on my Youtube channel and try to collect money for order GMC counter in future. Here is uranium development in Novosibirsk.And even earlyer I wrote post on my socials about EMF-390, other meters and affiliate program. There is more than 20,000 subscribers. Most of them are technicians.Before I already wrote post about EMF-390 and asking donations for speed up ordering: vk.com/wall51678172_10832[b]There are some pics:[/b][b]Pulse-sinusoidal signal from our tower. Wide of screen is 1200 seconds. Most powerful wave has 400sec periode = 0,0025Hz[/b][img]https://sun9-59.userapi.com/c855520/v855520196/27320/qON9qlNEAgw.jpg[/img][b]Spectrogramm. We see net of waves with step 3Hz from 0 до 18Hz.[/b][img]https://sun9-53.userapi.com/c849520/v849520865/13ba78/IlG6LClALzI.jpg[/img]And here is my videos:youtu.be/y8TLEqPUzTE [b]- about my detecting EMF in our village[/b][img]http://img.youtube.com/vi/y8TLEqPUzTE/maxresdefault.jpg[/img]youtube.com/watch?v=1tlDOwJ8Bzc [b]- about V2K detecting[/b][img]http://img.youtube.com/vi/1tlDOwJ8Bzc/maxresdefault.jpg[/img]youtube.com/watch?v=snVVyrrpKIY [b]- comparising cellular and V2K signals[/b][img]http://img.youtube.com/vi/snVVyrrpKIY/maxresdefault.jpg[/img]youtu.be/er9EC4DUvwo - [b]my program for viewing and decoding V2K records to voice and visualisations (XY mode)[/b][img]http://img.youtube.com/vi/er9EC4DUvwo/sddefault.jpg[/img][b]Sorry for mistakes and thanks for attention![/b]

The short version is that I needed a linear CCD for my DIY raman spectrometer, so I taught myself enough electronics and programming to get a working CCD.The PCB here is part of a larger package, including ARM firmware (for STM32 microcontrollers), software (linux, windows, macos) to make it easy for others to use the linear CCD TCD1304 in their projects.I have documented the specifics for TCD1304 in my project here:https://tcd1304.wordpress.comand here is the blog for the construction of my diy raman spectrometer (still a work in progress)https://erossel.wordpress.com

Sharing the power of spectroscopy with all by taking the open hardware sparkfun board and making a few modifications.

In order to scan the colour change on 96 well plates, we developed this sensor board that utilize 8 TCS34725 RGB colour sensors. With this board and a moving rail, you will be able to read all spots on the 96 well plate. Cannot afford a plate reader? You can make one yourself with this board!

This is not my personal work. Please visit https://github.com/mossmann/hackrf/tree/master/hardware/operacakehttps://hackaday.com/2018/01/23/shmoocon-delightful-doppler-direction-finding-with-software-defined-radio/

Измеритель ESR/L/C/F/P/t на PIC16F876Ahttps://radiokot.ru/circuit/digital/measure/73/https://www.radiokot.ru/forum/viewtopic.php?t=79006

### DESCRIPTIONVery simplistic grid for LED's, used for my spectrum analyzer for audio. It has a controller board attached wich holds 4 daisy chained shift-registers. It's to be used with a microcontroller. There is a tiny mistake which needs attention, though it's not a fysical problem with the board itself (see below)### TECHNICAL DETAILS / COMPONENTS- max 3mm Led's (96x)- A33IJ Resistor Network (12x) or similar - 74HC595 shift registers (4x)### LEARN / TOPIC / BUILD INSTRUCTIONSJust put the anode of the led through the square holes, the cathode through the round ones. !!! The top row of resistor networks grounds both the left and right row top 4 led's, if you want to control them seperately, make sure you seperate them (just follow the traces ^^)!!!For controlling them using the controller board, you probably noticed that there just 32 output pins. You can use mutliple controllor boards to give each led it's own output pin (so that means for 96 leds, you need 3 controllerboards per led grid). Or you multiplex them. In my project I multiplex like so: per row, the first 8 leds have a common ground, and the last 4 have a common ground. The first 8 leds just connect to one of the output pins from the controller board, and the last 4 leds connect to the same pin as the first four leds. It's a bit tricky controlling them, but when I finish my project I will share the code.Disclaimer, video shown here is not the final/finished product!