Electronics Forum | Electrical Engineering Forum - PCBGOGO

A****min

Why is controlled impedance so important?

162 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. ...

Y****dal

A very pleasant experience - My first time with PCBgogo

222 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...

E****ech

How to transmit data from an Arduino Wirelessly

197 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...

S****ndi

Make a Simple Ventilator - 2nd Part, the Ventilator CPU

205 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...

S****ndi

Make a Simple Ventilator - 1st part, the Ventilator Controller

383 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...

E****oni

Excelente servicio

363 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.

A****hom

Excellent Quality and Service

236 0 Jun 22.2020, 20:29:05

From the moment I submitted my quote and gerber files, PCB Gogo was on it. I received the quality review feedback within 4 hours and a final quote in 1 hr. PCB Gogo noted that my manufacturing would be completed in 2 working days. And it was!! Where do you get service like this? All payments and delivery communications were perfect. Thanks to Betty for her assistance. Great work Betty :) The boards were all well made, no visible manufacturing flaws. I most strongly recommend PCB Gogo as your pcb manufacturer of choice. I'm looking forward to doing business again soon. Thank you PCB Gogo.

A****ger

Very good PCB Manufacturer - fast production and shipping

506 2 Jun 08.2020, 17:27:57

An attempt to implement an idea as a project turned into a more complex layout. It was necessary to have this PCB manufactured by a professional manufacturer. Even a small quantity of only 5 pieces can be ordered, which are manufactured in the same quality as large quantities. Everything was manufactured as expected and promised, and the delivery was in time. I recommend this company to anyone who needs a PCB quickly and inexpensively.The turnaround time is so fast that there is no need to consider making any PCBs yourself.I will use this service again, thank yu very much for this great job !!

K****ndi

Prototype Friendly Service

363 0 May 23.2020, 21:04:57

With known specifications, you can work out the cost of obtaining small quantities of small boards in advance. The size limitations are not too restrictive for the majority of small projects and the quality of the boards is as good as that of the big players.The speed of production is even better than most of the other PCB houses, without any additional fees. You are offered a big choice of shipping options, complete with pricing, to help you total up your cost.The only drawback is the fact that pricing is quoted dollars, without explicitly stating that the prices and fees are in “US Dollars”. This can surprise customers from Australia, Canada, New Zealand and Singapore, to name a few.The promotion currently offered is what enticed me to try PCBGOGO with three boards in one order. It took a few back and forth E-mails to sort out what Gerber files should be uploaded to their server, but once sorted the order went smoothly and arrived in a timely manner, considering the world-wide pandem...

J****lec

Fast and quality PCB fabrication

679 1 Apr 15.2020, 17:10:11

For my small DIY home project I decided to try professional company to build my PCB, even I would be able to make it home by myself. During ordering I could choose a lot of parameters like board thickness, finish material, color and many other. And instantly saw expected price, that was awesome.After order I was able to see production status and progress. The PCB was created very fast.The quality of PCB was very good, all pads were very well defined, solder mask and vias were not damaged, silkscreen readable. Hand soldering was without any problems.Power up the PBA without any hidden problems of PCB.I can say that I will order another more complex PCB next time again at this company.

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