With just a Raspberry Pi Pico, an analog switch and an op amp, you can build a powerful SDR receiver covering the LW, MW and SW bands. Capable of receiving signals from halfway around the world.
The ESPboy CC1101 chip module allows you to detect Sub1Ghz signals (300-348MHz, 387-464MHz, 779-928MHz). Scan, decode, store to open garage doors, obstacles, IoT sensors...
2 Layers PCB 56.6 x 83.1 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen;
Might not be an actual working transmitter, but it does produce a few mW of RF power at 4 MHz using only two LMC555s.
Principle of Operation (see attached simplified schematic):
At lower operating voltages, the flip-flop (TR) input of the LMC555 can be used as an inverting comparator input to control the output of the device. This requires the Threshold (TH) input to be active (high). This circuit applies a DC bias at the switching threshold of TR and superimposes a small AC feedback signal to create an oscillator. An inverted version of the same signal is applied to the second LMC555 to produce two complementary open collector outputs (the device's discharge output). The output is then connected as a standard push-pull RF amplifier. The TH input is used as the enable input to key the transmitter.
This board is a Swiss Army Knife for IoT security researchers, developers, and enthusiasts. The board can be used with different types of software, including third-party sniffers such as SmartRF Packet Sniffer, Sniffle, zigbee2mqtt, Z-Stack-firmware, Ubiqua Protocol Analyzer, our custom firmware, or you can even Specific software requires writing your own software.
Pebble Tracker is a secure, battery-powered cellular IoT prototyping platform designed for blockchain-based applications. Built around Nordic Semiconductor's latest low-power nRF9160 System-in-Package (SiP) and driven by open source firmware, Pebble Tracker features GPS support, a rich variety of sensors, NB-IoT/LTE-M connectivity and advanced security features making it the Ideal for complex logistics applications where trust is paramount. Combined with the IoTeX blockchain, its onboard capabilities allow developers to design and build innovative, decentralized IoT solutions that go far beyond traditional asset tracking.
The SOCORAD32, also known as the ESP32 Software Controlled Radio, is a professional grade hackable radio for amateur radio exploration, voice and data communications using simple AT commands. Just add a speaker and batteries and you've got a fully functional walkie-talkie. With a dedicated Push-to-Talk (PTT) button onboard, SOCORAD32 works right out of the box without touching a line of code!
This reference design is a 2cm x 2cm RGB LED animation solution for battery powered applications using the LP5523 and MSP430FR2111 devices. The LP5523 device is an LED driver with a programmable control engine in a DSBGA package. The LP5523 provides realistic lighting patterns for applications that must fit on extremely small PCBs. The design demonstrates full functionality while using limited MCU resources.
This reference design focuses on high-side current measurements using TI's range of voltage output current shunt monitors. This design can be used to measure high-side current in industrial applications where common-mode dynamics can drop below ground. Overall, this design helps designers build electromagnetic compatibility (EMC) compliant circuits based on current shunt monitor devices while achieving a highly accurate current monitoring solution in the presence of a wide range of -14V to +80V common-mode voltages.
Power management for the energy harvesting, energy buffering and back-up power is a key challenge in the fault indicator design. The TIDA-01385 introduces a circuit about harvesting energy from a current transformer for the system load of a fault indicator while storing the extra energy in a super capacitor. A primary Li/SOCl2 battery is used as back-up power to extend the fault indicator operating time after the power grid fails. With input current from 3mA to 2A, the reference design provides a stable 3.6V to system load within two seconds.
The Bidirectional 400V-12V DC/DC Converter Reference Design implements an isolated bidirectional DC/DC converter based on a microcontroller. The phase-shifted full bridge (PSFB) with synchronous rectification controls the power flow from the 400V bus/battery to the 12V battery in buck mode, while the push-pull stage controls the reverse power flow from the low-voltage battery to the high-voltage bus/battery in boost mode. . This implementation uses a Texas Instruments (TI) 32-bit microcontroller TMS320F28035 on the low-voltage side to achieve closed-loop control of bidirectional power flow. This digital controller system implements advanced control strategies to optimally control power stages under varying conditions and provides system-level intelligence for safe and seamless transitions between operating and PWM switching modes.
This TI reference design describes how to emulate an EEPROM using ferroelectric random access memory (FRAM) technology on an MSP430™ ultra-low power microcontroller (MCU) along with other sensing capabilities that can be enabled when using the MCU. combine. This reference design supports connection to the host processor via both I 2 C and SPI interfaces, allowing for multiple slave addressing.
This TI design uses Texas Instruments' nanopower system timers, SimpleLink™ ultra-low power wireless microcontroller (MCU) platform, and humidity sensing technology to demonstrate an ultra-low power approach to driving a sensor end node. These technologies enable extremely long battery life: more than 10 years on a standard CR2032 lithium-ion coin cell battery. This TI Design includes system design techniques, detailed test results, and information to get your design started and up to speed.
The Bidirectional 400V-12V DC/DC Converter Reference Design is a microcontroller-based implementation of an isolated bi-directional DC-DC converter. A phase shifted full-bridge (PSFB) with synchronous rectification controls power flow from a 400V bus/battery to the 12V battery in step-down mode, while a push-pull stage controls the reverse power flow from the low voltage battery to the high voltage bus/battery in boost mode. In this implementation closed loop control for both directions of power flow is implemented using Texas Instruments 32-bit microcontroller TMS320F28035, which is placed on the LV side. This digitally-controller system can implement advanced control strategies to optimally control the power stage under different conditions and also provide system level intelligence to make safe and seamless transitions between operation modes and PWM switching patterns.
Increase the number of clock source outputs using low-jitter LVPECL fanout buffers
EEWorld
subscription
account
EEWorld
service
account
Automotive
development
community
Robot
development
community
About Us Customer Service Contact Information Datasheet Sitemap LatestNews
Room 1530, 15th Floor, Building B,
No.18 Zhongguancun Street,
Haidian District,
Beijing, Postal Code: 100190
China
Telephone: 008610 8235 0740
京公网安备 11010802033920号
