Crampton Christmas Boards 1284P
33 0 Dec 29.2020, 11:28:53
This is a Christmas programmable development board that incorporates the ATMEGA1284P chip, an H bridge and an FTDI programmer. It is Arduino compatible, so it can be programmed with the Arduino IDE. It has 31 digital inputs and outputs, of which 6 are pwm and 8 are analog inputs. I developed this board in the EasyEDA PCB design program (https://easyeda.com/), I highly recommend it as it is very easy to use and has a lot of built-in libraries. I am very happy that I did this as I am only 17 years old and I don't have much experience in PCB design.Leave your questions.I attach the files
Why is controlled impedance so important?
513 0 Sep 01.2020, 16:20:52
With the increase of signal switching speed on a PCB, the controlled impedance has been widely used in electronic industry. The importance of controlled impedance in a PCB can depend on various variables, including the particular characteristics and how the circuit board will be used. What’s more, controlled impedance PCB can offer a repeatable high frequency performance in PCB fabrication. What does impedance mean? As we all know, impedance is the combination of the inductance and capacitance of an electric circuit at high frequency, and it’s also measured in Ohms. But unlike resistance which is a DC (direct current) characteristic, impedance is an AC (alternating current) characteristic, signifying that it’s related to frequency while resistance is not. When a signal transfers to another identical impedance from the given impedance on a conductor, the transmission is optimum. However, the signal will be worse due to the reflections and attenuation if the impedance is different. ...
A very pleasant experience - My first time with PCBgogo
471 0 Jul 31.2020, 01:27:36
I am trying to develop some prototype for what may become in the future a small production. I usually deal with US manufacturers for all my PCBs, but their prices have increased drastically (blame it on the lock-down or not) and I decided to try PCgogo. After reviewing on the Internet what people thought about them, I pulled the trigger so to speak and sent them an order for 5 prototype boards (325 x 230 mm size - 2 layers - 2 oz Cu - 2mm Thickness). I just received my boards today, courtesy of FedEx International parcels and must say that I am very happy and pleasantly surprised by the quality. I have not assembled them yet, but I checked the hole diameters, delicate and fine silk-screening and the overall fabrication of the boards with a lot of satisfaction. The most amazing part is the rapidity with which the whole operation was done: I sent my Gerber and Excellon files on July 22nd afternoon. On July 30, the boards are in my house !!! All along, Danny (PCgogo sales rep) has been ke...
How to transmit data from an Arduino Wirelessly
Ask and Answer
504 0 Jul 24.2020, 18:23:14
Arduino boards embody multiple peripherals for communication with other devices. They include UART, I2C USB, and SP1. Wired communication has however proven to be difficult mostly so where the distance between the sender and receiver is considerable. As such, wireless communication comes in handy. Wireless communication is also critical in incorporating Arduino boards into the IoT environment. We have compiled several modules you can use to send data from an Arduino board to another Arduino or to the web.Wireless data transmissionNRF24L01The NRF244L01 transceiver module uses a 2.4GHz ban. It offers baud rates of between 250kbs and 2Mbps. In an open space and with lower baud rates, its range can stretch up to 100 meters. The NRF24LO1 can use 125 different channels which thus is able to have a network of 12 independent modems in one place. Each of the channels can have up to addresses or rather each of the units is able to communicate with 6 other units simultaneously.The NRF24L01 co...
Make a Simple Ventilator - 2nd Part, the Ventilator CPU
425 0 Jul 13.2020, 14:42:02
This is the 2nd part of the Simple Ventilator System (SMS), it's basically based on an Arduino development board/kit, there are 3 options of Ventilator CPU board:1. Based on Arduino Uno board, whereas this well known ready made board is available (almost) everywhere so this Simple Ventilator System hopefully can be made anywhere & everywhere in answering today requirement of people respiratory machine2. Based on Arduino Mega by ATmega 1280/2560 micro controller, herewith we modify this board as described on the enclosed picture with addition on: - WiFi connection option by using WeMos D1 Pro Mini or Omega 2 module - 3 analog interfaces for analog sensor/push button switch - I2C interface for LCD module - I2C ports for pressure/temperature sensor connection - 2 ports for small DC motor control by those addition, this board become fully Medical Internet of Things with 2 option of WiFi connection, incorp...
Make a Simple Ventilator - 1st part, the Ventilator Controller
669 0 Jul 09.2020, 15:22:25
In responding to the current world situation, cq. facing Covid-19 Pandemic so we try to design and to make devices to help people, so we herewith design the Simple Ventilator System (SVS ) that mainly using Ambu bag. Hopefully this system can help people respiratory and this system can be made semi open system, open an option to be sell as a complete kit. This Ventilator System contains 2 Electronic Circuit Boards, the Ventilator Controller & the Ventilator CPU. Herewith in this first section we describe the Ventilator Controller which is based on Arduino's L293D Motor Driver Shield that be modified & be added for the HMI (Human Machine Interface) as follows: 1. As 2 pins for I2C protocol are needed, so modify connection pin D13 (suppose for I2C SCL) to pin D1 of Arduino board, but for connecting the 2 I2C ICs (the PCF8574 I/O Expander & the PCF8563T RTC IC) by cables to J20 port for SCL (D13), SDA (D12) & GND pin connection. 2. The PCF8574 I/O Expander will...
648 0 Jun 26.2020, 21:41:42
Un miércoles por la tarde en Argentina compartí mis archivos gerber para verificar si mi dise?o PCB podría ser realizado. Ese mismo día por la noche PCBGOGO me confirmó que se encontraba listo para producir. Como me quedaban algunas dudas, me comuniqué por Skype con Danny, quien muy amablemente me guió en todas las consultas que le hice. Finalizadas las consultas, aboné lo necesario y automáticamente comenzó el proceso de producción. Hoy es viernes y mi pedido ya se encuentra en camino a casa. ?Muy recomendable! Excelente servicio.
PCPGoGo is really resonable, but beware of DHL costs!
33 0 Jun 24.2020, 02:32:15
I recently had 3 sets of boards made by PCBGoGo.I was really pleased with the quality, and how quick the designs were DRC checked and fabricated.The $5 for 5 off 100mm x 100mm is truly amazing. However, please do be aware of the additional costs of P&P and tax in your receiving country.For the UK this was $28 for the P&P, but DHL charged me an additional ￡21 before they would release the boards.