Pocket Voltage Supply: A USB Powered Variable Voltage Supply

What is the Pocket Voltage Supply and What Makes it Interesting? The Pocket Voltage Supply is a USB powered variable voltage supply. It can be powered with any 5V USB hub and can supply up to 1.5A. 5V USB hubs can be found almost anywhere; desktop computers, laptops, cell phone chargers, even portable USB battery banks. Pairing the Pocket Voltage Supply with a portable USB battery bank allows the user to te ...

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LTM8056 – 58VIN, 48VOUT Buck-Boost μModule Regulator

Features Complete Buck-Boost Switch Mode Power Supply Wide Input Voltage Range: 5V to 58V 12V/1.7A Output from 6VIN 12V/3.4A Output from 12VIN 12V/5.4A Output from 24VIN Up to 96% Efficient Adjustable Input and Output Average Current Limits Input and Output Current Monitors Parallelable for Increased Output Current Wide Output Voltage Range: 1.2V to 48V Selectable Switching Frequency: 100kHz to 800kHz Synch ...

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With MCP73831 you´ll charge lithium cells easily and safely

Li-Ion a Li-Polymer cells are becoming a No.1 choice for many applications, where they persuade by high energy density, low weight, low self-discharge and for majority of applications also by their favorable flat shape (Li-Po). Their price is also affordable (in regard to their properties) and so there´s usually only one “difficulty” - to solve charging, or more exactly - overall management of these cells. ...

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Electronic Mosquito Repeller

This circuit is built to repel mosquito using high frequency sound. The design is comprised of LM555 timer which provides the pulse generation and precision timing. It is also a stable controller capable of monostable or astable operation. The 74HCT4017BQ device is a Johnson decade counter with 10 decoded outputs. It provides the signal to be fed into the 555 timer which is connected to the output piezo spe ...

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Raspberry Pi Compact Camera

Step 1: Parts 1 x PiJuice 1 x Raspberry Pi Model a+ 1 x Raspberry Pi Camera Module 1 x LaserCut Kit 1 x 2.2" Adafruit TFT screen 1 x Push Switch 1 x Micro SD card 10 x Plastic Spacers 4 x Screws 1 x Right Angle Header Approximately 15cm of thin conducting Wire with insulating cladding. Step 2: Setting Up the SD Card The SD card should contain the latest version of Raspbian, available for download from the R ...

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Euroclamp CEM – DIN rail enclosures for every PCB

7,5 mm/ 22,5mm but also 35mm - in these width is available well-proven series of DIN-rail enclosures Euroclamp CEM17, CEM22 and CEM35, which was introduced to you in our article Gain more space on the DIN rail with housings Euroclamp CEM22. Enclosures are delivered “complete”, i.e. including a Din rail holder and the top cover. The only, what´s necessary to buy (depending on a target application) are connec ...

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LED DC Voltage Indicator

This design is a type of indicator that is used in voltage reading. It operates as an indicator rather than a meter that drives LED for voltage indication. Voltage thresholds are 1.5, 3, 4.5 and 6V. Above each incremental threshold an additional LED turns on. Many voltage indicators rely upon the measurement source voltage for power, but in this voltage indicator case using the MCP6L94T-E/ST, 1.5V is simply ...

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Low cost DC millivolt source

DC millivolt sources are often used for thermocouple simulations, DMM, ADC and analog circuit calibrations and fault findings, etc. Most of the DC millivolt circuits are based on expensive (and sometimes hard to find) operation amplifier like OP7, LT1077, etc. In this article we introduce low cost DC millivolt source based on commonly available LM308 precision operational amplifier, ICL8069 low voltage refe ...

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Touchscreen Internet Radio, Raspberry

Step 1: Planning. The dimensions in the picture are in millimeters. The plan is simple. Make a table top case for the screen and raspberry. I had to make the base of the case 3mm taller than in the plans. I was fooled by the length of the solders under the raspberry. The 3D model of the case was made with ScetchUp, witch is a free and brilliant software to use. The project will include the printable file, b ...

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The Advantages (and Drawbacks) of DC-to-DC Voltage Converters with Integrated Inductors

Such is the popularity of DC-to-DC voltage converters (“switching regulators”)––due to their high efficiency across wide input- and output-voltage ranges––that chip makers have focused a lot of research dollars on squeezing the essential components of the devices into modules. These modules typically include pulse-width-modulation (PWM) controllers and switching elements in a single, compact package, easing ...

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