The board built around LM2575-ADJ from Texas instruments. A 1.0 A output current capability power supply that features an adjustable output voltage, This regulator board delivers 1.0 A into 1.2 V to 35 V output. The input voltage ranges from roughly 8.0 V to 40 V. In order to achieve a 10 or more times reduction of output ripple.
Features
Output 1.2 to 35 VDC @ 1 A
Input Supply 8 To 40V ( 1.2V To 35V Required 40V Input)
Onboard Trimpot for output voltage adjust
On Board Power LED
Header Connector For Input & Output
1.2V to 35V – 1A Adjustable Regulator Board – [Link]
The board built around LM2575-ADJ from Texas instruments. A 1.0 A output current capability power supply that features an adjustable output voltage, This regulator board delivers 1.0 A into 1.2 V to 35 V output. The input voltage ranges from roughly 8.0 V to 40 V. In order to achieve a 10 or more times reduction of output ripple.
Features
Output 1.2 to 35 VDC @ 1 A
Input Supply 8 To 40V ( 1.2V To 35V Required 40V Input)
This circuit can produce an output of 3.3V and 1A current continuously for a voltage input varying from 2.5V to 4.2V. The LTC3441 is a high efficient buck boost converter which plays a vital role in portable instrumentation because of its fixed frequency operation. This circuit produces the output from a single Li-ion battery. Multiple cells can also be used within the specified range of input voltage.
Features
Input(V): 2.5V DC to 4.2V DC
Output(V): 3.3V DC
Output load: 1A
PCB:21mmX12mm
2.5V-4.2V input to 3.3V output – 1A Buck Boost Converter using LTC3441 – [Link]
4 Channel Opto isolated board has been designed around 6N137 Opto-coupler, the 6N137 optocoupler is designed for use in high-speed digital interfacing applications that require high-voltage isolation between the input and output. Applications include line receivers, microprocessors or computer interface, digital programming of floating power supplies, motors, and other control systems.
The 6N137 high-speed optocoupler consists of a GaAsP light-emitting diode and an integrated light detector composed of a photodiode, a high-gain amplifier, and a Schottky-clamped open-collector output transistor. An input diode forward current of 5 milliamperes will switch the output transistor low, providing an on-state drive current of 13 milliamperes (eight 1.6-milliampere TTL loads).
Note : For 3.3 Input Signal R1, R4, R7, R10 = 220E
Bruno Gavand build a simple metal detector using PIC12F683. He writes:
The idea of this circuit is to hack PIC oscillator circuit, by replacing the crystal by a coil : the frequency of the oscillator then depends on presence of metal near the coil, just like in a classic metal detector.
STMicroelectronics’ LIS2DS12 3-axis accelerometer, LSM6DSL/M 6-axis inertial module, and new LSM303AH eCompass enable always-on fitness-tracking applications to operate longer and record progress more accurately. by Susan Nordyk @ edn.com:
These smart sensors help track movement continuously with minimal impact on device battery life by performing various motion-related calculations on-chip, instead of using the main system processor.
ESP8266 has made it possible for makers to develop IoT applications in much simpler and more inexpensive ways. EasyESP-1 is a new ESP8266 prototyping board, specially designed for beginners by Raj from Embedded Lab. With an onboard USB-to-Serial converter pre-installed, EasyESP-1 does not require any additional hardware to download your application firmware to the ESP8266 chip. The ESP module used in this development board is ESP-12E. All the I/O pins are broken out to 0.1” female headers for easy access, as well as to standard Grove connectors for connecting Grove sensors and other compatible modules. The 180-point breadboard further facilitates experimenting and testing of external circuits. You can buy EasyESP-1 from their Tindie Store.
EasyESP-1 makes ESP8266 prototyping easy
Features
Easy access to all GPIO pin through female headers and Grove connectors
On-board USB-UART chip for easy programming and debugging
180-point breadboard for experimenting with test circuits
On-board 3.3V (800 mA) regulated power supply
Two tact switches for user inputs, and one output LED
Slide switch to enable/disable auto Wake Up feature during Sleep mode
For more details about EasyESP-1, visit Raj’s Page.
Silicon Lab’s TS1100 and TS1101 current sense amplifier’s features discussed in this app note.
Sensing and controlling supply current flow are a fundamental requirement in most all electronic systems from battery-operated, portable equipment to mobile or fixed-platform power management and dc motor control. High-side current-sense amplifiers (or “CSAs”) are useful in these applications especially where power consumption is an important design parameter. New CSA developments offer even greater benefits in allowing engineers to save power without sacrificing performance.
Redefining a new state-of-the-art in microampere current-sense amplifiers – [Link]
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