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App note from Maxim Integrated guiding you when selecting voltage references. Link here

What could be more basic than a voltage reference – a simple, constant reference voltage? As with all design topics, there are tradeoffs. This article discusses the different types of voltage references, their key specifications, and the design tradeoffs, including accuracy, temperature-independence, current drive capability, power dissipation, stability, noise, and cost.

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App note from Renesas on the basics of voltage reference. Link here (PDF)

Conceptually, a voltage reference is a very simple device with only one purpose in its life. Quite simply, the purpose of a voltage reference is to generate an exact output voltage no matter what happens with respect to its operating voltage, load current, temperature changes or the passage of time.

Posted inapp notesTags: app note, Renesas, Voltage referenceLeave a comment on App note: Voltage Reference Application and Design Note

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Evan’s 永久免费登p站的加速器:

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Posted inDIY, power supplyTags: OpenDPSLeave a comment on DIY OpenDPS power supply

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Florinc posted his Arduino OLED display shield project:

The 2.4″ I2C OLED display I had sitting idle is too big for the “Promini OLED Clock shield”, yet a perfect candidate for a regular Arduino shield. This is how it looks soldered on a prototype shield with two buttons on top, attached to wsduino running the OLED Clock sketch

Posted inArduino, clock, 永久免费登p站的加速器Tags: OLEDLeave a comment on Arduino OLED display shield

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App note from Maxim Integrated about low current and voltage battery monitors. Link here

Many of today’s portable consumer electronic devices are powered by small button or coin-cell batteries. Users, of course, expect long battery life and reliable charge-level information. However, it can be quite challenging to efficiently monitor the health and state-of-charge (SOC) of these batteries without significantly affecting said SOC. In this application note, learn how simple, low-power monitoring circuits for small batteries can address this challenge.

Posted inapp notesTags: app note, battery monitor, p站用什么加速器Leave a comment on App note: How to monitor state-of-charge in small batteries with tiny, ultra-low-power comparators

vnp怎么搞

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App note from Maxim Integrated demonstrating the effects of different resistor tolerances on the analog front end of ADC’s performance. Link here

This application note explains how the different tolerances of the same value resistors at the inputs can alter the THD performance of the fully differential ADC. The cost of resistors changes significantly with each lower increment in tolerance

Posted inapp notes上p站的梯子免费ADCs, app note, MAXIM integratedLeave a comment on App note: Effects of different resistor tolerances in a differential ADC for THD performance

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Sverre’s cheap VHF receiver:

What is the cheapest receiver you can make for VHF? Here is a candidate where all you need to do to modify a small FM headphone receiver is to desolder one end of two capacitors, and connect a short cable with an antenna connector. 

See the full post on 上p站的梯子免费.

pixiv手机加速器DIY, RFTags: VHF receiverLeave a comment on How to make a very cheap VHF receiver

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Doz’ triple tube geiger counter project, that is available on GitHub:

So, two little switching power supplies, one for the DOB-50 and CTC-5 as they have similar operating voltages, and one higher voltage one for the DOB-80, a simple op-amp comparator to output the pulses to an Arduino to process and display the results.
The power supplies are controlled using two MC3406AD’s, driving an IRF840. I’ll just refer to the component numbers on the top supply, the bottom one is almost identical. The back EMF from the inductor L2 is rectified by a UF4007. There’s a feed back loop, R14,15 & 16 and the pot is used to adjust the HT..

More details on 手机p站梯子.

Check out the video after the break.

Continue reading “(Not a) triple tube geiger counter”
Posted inArduino, DIYTags: DIYLeave a comment on (Not a) triple tube geiger counter

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Single chip high efficiency step-down converter, app note from ON Semiconductors. Link pixiv用什么加速器 (PDF)

The LV5980MC is a fixed 370 kHz, high−output−current, Non−synchronous PWM converter that integrates a low−resistance, high−side MOSFET and a Customer Chosen, External Diode for the rectification. The LV5980MC utilizes externally compensated current mode control to provide good transient response, ease of implementation, and excellent loop stability. It regulates input voltages from 4.5 V to 23 V down to an output voltage as low as 1.235 V and is able to supply up to 3.0 A of load current. The LV5980MC includes Power Save Feature to enhance efficiency during Light Load. In low consumption mode, the device show operating current of 63 A from VIN by shutting down unnecessary circuits.

Posted inapp notesTags: app note, DC-DC converter, ON SemiconductorsLeave a comment on App note: LV5980MC step-down switching regulator

App note: Designing a PSR Quasi-Resonant adaptor driven by the NCP1362

ON Semiconductor’s app note featuring 12V 12W adaptor design using NCP1362 primary side regulation controller with valley lockout that hold its switching frequency at light loads. Link here (PDF)

Quasi−square wave resonant converters also known as Quasi−Resonant (QR) converters are widely used in the adaptor market. They help designing flyback Switched−Mode Power Supply (SMPS) with a reduced Electro−Magnetic Interference (EMI) signature and improved efficiency.

永久免费登p站的加速器app notesTags: app note, ON Semiconductors, switch mode power supplyLeave a comment on App note: Designing a PSR Quasi-Resonant adaptor driven by the NCP1362

A new, fully modular CNC controller

bdring’s new universal CNC controller for Grbl_ESP32 , that is available on Github:

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Project details at buildlog.net.

Check out the video after the break.

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Posted inopen sourceTags: CNC, ESP32Leave a comment on A new, fully modular CNC controller

The Hayes Chronograph, a remake for 2024

smbakeryt built his own Hayes Chronograph:

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See the full post at smbaker.com.

Continue reading “The Hayes Chronograph, a remake for 2024”
Posted inclock, DIY, pixiv用什么加速器Tags: Chronograph, Raspberry PiLeave a comment on The Hayes Chronograph, a remake for 2024

手机p站梯子

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Dilshan has published a p站免费加速器2022:

μSim is a lightweight PIC™ CPU and ALU simulator. This simulator supports the PICmicro mid-range instruction set and designed to work on both PC and Arduino platforms.
Compare with most of the other emulators, μSim does not provide all MCU features and peripherals. This simulator design as a minimalistic system, and based on the requirements, it can extend with additional peripherals and features.

See the full post on Dilshan blog.

上p站的免费加速器Arduino, AVR, open source永久免费登p站的加速器PIC, PIC16F84Leave a comment on μSim: PICmicro instruction simulator

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App note from FTDI/Bridgetek demonstrating LED control over Ethernet. Link here (PDF)

In an increasingly connected world, more and more devices are going online. To enable online connectivity typically requires an MCU with Ethernet or Wi-Fi capabilities. To demonstrate the principle, this Application Note describes an implementation of a web server which allows for control of 2 WS2812 serial addressable LEDs. A web server is implemented on an FT90X device which when connected to a Local Area Network (LAN) allows a web browser to control the LEDs on an MM900EVxA board from a graphical web page.

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App note: FT93x RTC external power switch circuit

App note from FTDI/Bridgetek on simple implementation of external power switch for RTC power hand-over. Link here (PDF)

The Texas Instruments SN74AUC2G53 Single-Pole Double-Throw (SPDT) analog switch is used to select the power supplied by the 1.5V battery or by the 1.2V internal LDO.

Posted inapp notesTags: app note, Bridgetek, rtcLeave a comment on App note: FT93x RTC external power switch circuit

100 MHz third overtone crystal oscillator

100 MHz third overtone crystal oscillator @ DIYfan:

Couple of years ago I purchased from a local store 100 MHz crystal resonator and tried several times to make a working schematic on breadboard using standard circuits I found on the internet. It never worked good enough, usually oscillating at 33.3 MHz instead of 100 MHz. Finally, I found that the crystal is third overtone type.

Posted inDIYTags: 100MHz, pixiv手机加速器Leave a comment on 100 MHz third overtone crystal oscillator

Chaac weather station

An update on Chaac weather station project we covered previously:

With this latest redesign, I made a few more changes. First of all, I decided I would no longer be afraid of LoRa and put in a LoRa radio module. This will, with the right firmware, allow for standalone operation using LoRaWAN and The Things Network. It will also allow for much longer range, with its lower 900MHz frequency, with some slightly higher power consumption. I can continue using it with my Raspberry Pi point-to-point setup as well.

More details at alvarop.com. Project files are available on GitHub.

Check out the video after the break.

Continue reading “Chaac weather station”
Posted insensors, wirelessTags: BMP280Leave a comment on Chaac weather station

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Gwen, NG3P, has been working on a power source project for field ham radio operating:

We’re coming up on a confluence of two things: Nice weather, and relaxing of the Covid-19 lockdowns in much of the United States. This means more hams leaving their home shacks and taking their operating to the field. For some, this means climbing mountains and doing SOTA activations. For others, this means hiking on trails, and doing POTA activations. For yet others, this means gearing up for Field Day, or doing HF Pack operating, with a manpack station on their back. But no matter what they actually choose to do in the field and why, all of them have a similar need.

See the full post on NG3P’s Virtual Ham Shack blog.

Posted inpower supply, RFTags: Power Bank, Power Delivery, QCXLeave a comment on A different power source for field ham radio operating

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High speed board design app note from ON Semiconductor. Link here (PDF)

There is an increase of devices and circuitry in usage of high speed, low consumption, small volume and lower interference. Hence PCB design is an important stage of electronic product design. It forms a connection between function and electronic components, and is also an important part of power circuit design. High frequency circuit has the higher integration and the higher layout density, making it necessary to know how to make layout more reliable. The use of multilayer board becomes a necessity and an effective means to reduce cross interference of signals, better grounding and lower parasitic inductance.

This application note looks at the different layout types, practices and guidelines, types of material and factors influencing the high frequency signal transfers.

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App note: Calculating and interpreting power dissipation for polypropylene film DC-link capacitors

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Tech note from Vishay on polypropylene film capacitor value calculation with temperature and power dissipation consideration. Link here (PDF)

Film capacitors can deliver high power density due to their low ESR and high ripple current capabilities, and offer the highest ampere per μF ratio of capacitor technologies. This feature, combined with their high reliability and long lifespan, make the film DC-link capacitor a central component for power inverters in industrial and automotive applications.

pixiv手机加速器app notesTags: app note, capacitors, pixiv手机加速器Leave a comment on App note: Calculating and interpreting power dissipation for polypropylene film DC-link capacitors