COFFEE POWER MANAGER using PIC16F628

Introduction The problem was this...at Redeeming Grace Church we were meeting in a public school prior to moving in to our permanent facility. Each Sunday morning we would bring in three large percolating coffee pots to brew regular, decaf, and hot water for the mid-service break time. Each pot drew 9 amps. Because the average 120VAC power receptacle "outlet" in the USA is protected by a 20-amp breaker, thr ...

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PIC32MM Family of Low Power, Low Cost, 32-bit Microcontrollers

For applications demanding low power and longer battery life, the PIC32MM has sleep modes down to 500 nA. Applications with space constraints will benefit from the small 4x4mm package options. The PIC32MM devices include core independent peripherals, designed to offload the CPU for lower power and flexible system design, such as Configurable Logic Cells (CLC) and Multiple-output Capture Compare PWMs (MCCPs) ...

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9 VDC Regulated Power Supply

9-VDC-POWER-SUPPLY-G015 Tiny low current 9 VDC Regulated Power supply designed around bipolar transistor and zener diode. The circuit is known as series voltage regulator or emitter follower voltage regulator. The unregulated supply fed to input and the circuit regulate the voltage and provide constant 9V DC, 250mA. The zener diode provides the reference voltage to the base of the transistor. This is very s ...

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Powering Your Microcontroller’s Base Project

A good power supply is an essential subject to the microcontroller’s base project; it’s like a heart that gives a life to our microcontroller. Sometimes we take it for granted the important of having an adequate power supply to our microcontroller project and this can lead to the unexpected result or behavior from the circuit. In this tutorial we will learn the principal of powering our microcontroller and ...

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LT puts supercapacitor power back-up on a chip

Linear Technology has put the whole of a supercapacitor power back-up system on one chip. Rated at 2A, it will back-up a voltage rail (Vsys) between 1.71 and 5.25V. Key to the chip, called LTC3110, is a 1.2MHz four-switch bi-directional dc-dc converter that both charges the capacitor and can also extract almost all of the energy remaining in it – as it keeps on switching until the capacitor has only 100mV l ...

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New Intelligent Analog Solutions – Enabling Efficient Lighting, Motor Control and Power Conversion – PIC 16F1787

Features Enhanced Mid-Range Core with 49 Instruction, 16 Stack Levels Flash Program Memory with self read/write capability 256 Bytes of EEPROM Internal 32MHz oscillator 3 x PSMC (Programmable Switch Mode Controller)- Dedicated 16bit PWM- Digital and/or analog feedback control of PWM frequency- Dead-band control / auto-shutdown & restart 4 x Fast Comparators with selectable Voltage Reference 3 x Operatio ...

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Low voltage power supply unit

In this post we introduce simple and flexible, regulated low voltage power supply unit. This power supply has provision for 4 outputs such as 1.5V, 1.8V, 2.5V and 3.3V. We mainly build this low voltage power supply unit to test (and power-up) low voltage MCUs, CPLDs and radio receivers. For this power supply we choose 1.8V, 2.5V and 3.3V to get it compatible with most of the LVTTL/LVCMOS devices. Other than ...

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Internet-of-Things Power Meter

The Internet-of-Things Power Meter (IPM) is a device fixed on top of the regular household power meter that provides detailed information about the electricity usage. Modern power meters have a LED blinking every time a Watt is used, the IPM detects these flashes using a light sensor, counts them, saves the values to an SD card. Later the data is stored to the cloud. Usually power companies provide very rou ...

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Simple Power Guard – PIC12F683

This is a very simple and accurate power guard circuit. This circuit is useful to guard the electronic or electrical devices from mains transients and spikes. Very high spikes can develop at power on due to sparking in the switch and more serious effects occur when power resumes after a power failure due to high magnetic field in the distribution transformer. This will damage your device permanently. To avo ...

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Power-on Reminder with LED Lamp

Many a times equipment at workstations remains switched on unnoticed. In this situation, these may get damaged due to overheating. Here is an add-on device for the workbench power supply that reminds you of the power-on status of the connected devices every hour or so by sounding a buzzer for around 20 seconds. It also has a white LED that provides good enough light to locate objects when a main fails. Here ...

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