Circuits & Schematics Microchip - 4

31. TinyCalibrator - OSC Calibrator and High-Voltage Fuse Resetter
    Stefan Wagner
    Circuits Microcontrollers Usage Microchip ATtiny10 Attiny13 ATtiny24 ATtiny25 ATtiny44 ATtiny45 ATtiny84 ATtiny85
    Because the 8-pin ATtinys only have a few GPIO pins available, they are usually operated without an external clock. The internal oscillator does a good job in most applications, but when it comes to precise timing, its 10% accuracy is often ...
    Aug 4, 2021
32. A simple and fully automatic, 12V uninterruptible power supply system for small/medium power appliances
    Circuits Supply Microchip PIC16F688
    Motivation This is a simple and fully automatic, 12 V uninterruptible power supply system for small/medium power appliances (Figure 1). This power supply specifically designs to drive routers and modems to provide uninterrupted internet and ...
    Jul 22, 2021

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    Circuits Analogue Design Microchip 2N7000
    Jul 6, 2021
34. Depletion-mode MOSFET kick-starts power supply
    Gregory Mirsky
    Circuits Supply Microchip DN2470
    Many switch-mode power supplies use “kick-start” circuits to initialize their offline operation. These circuits may be simple resistors, such as IRIS4015 , or more complicated arrangements built with bipolar transistors or MOSFETs. ...
    Jun 10, 2020
35. Self-Calibrating USB Voltage/Current Meter
    Circuits Measurement Microcontrollers Usage Microchip ATtiny13A
    Tirdad Sadri Nejad Hackster.io With a code size of 1 KB on an ATtiny13A MCU, this tiny module measures voltages up to 22 volts and current up to 5 amps. There are a lot of so-called USB doctor modules which are used for monitoring currents flowing ...
    Mar 26, 2020
36. Stand-alone Inductance Meter on PIC16F1936
    Circuits Measurement Microchip PIC16F1936 Atmega328
    Lukas Fässler soldernerd.com Some of you may have seen my arduino-based inductance meter in the article [1]. The arduino-based meter works well and made a great proof-of-concept. But for everyday use you’re probabely not looking for an ...
    Aug 21, 2018
37. Quartz crystal-based remote thermometer features direct Celsius readout
    Jim Williams Mark Thoren
    Circuits Measurement Microchip PIC16F73
    Although quartz crystals have served as temperature sensors, designers haven't taken advantage of the technology because few manufacturers offer the sensors as standard products (references 1 and 2 ). In contrast to conventional resistance- or ...
    Jun 14, 2018
38. Use an Op Amp as a Set/Reset Flip-Flop
    Aruna Rubasinghe
    Circuits Analogue Design Microchip MCP6022
    Aruna Rubasinghe EDN You can make a set/reset flip-flop from two NAND or NOR gates or use readily available set/reset flip-flop ICs, such as the 74HC279 quad-set/reset latch. The drawback of these methods is that they require a large amount of ...
    Jan 9, 2018
39. Add charging status to simple lithium-ion charger
    Circuits Supply Power Microchip MCP73812
    Peter Miller EDN Like other simple, single-cell lithium-ion battery chargers, Microchip’s MCP73812 provides no means of indicating the charging status. You can remedy this situation by adding four components (Figure 1). Add one more LED, and ...
    Oct 24, 2016
40. Reduce relay coil current with a reset controller IC
    Circuits Analogue Design Power Microchip MCP101
    Peter Baxter EDN This Design Idea shows how to use a 63¢ (Q=1) microprocessor reset voltage detector IC in a relay coil drive circuit to greatly reduce the coil’s hold-in current. When asked to estimate the coil current of a small Omron ...
    Sep 6, 2016

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