Programming microcontrollers isn’t hard. Building a programmer makes a great first electronics project. The goal of this instructable is to explain the simple ‘in circuit serial programming’ method used with Microchip PICs.
Understanding ICSP for PIC Microcontrollers - [Link]
Giorgos Lazaridis writes:
Some time ago I presented a small circuit with the MCP1640, the High Efficiency Battery Boost Regulator using the MCP1640. My original intention was to combine it with this one and make a complete power supply unit with SMPS technology, dual voltage output, battery charger and power failure signal output. And here it is!
SMPS with Battery Backup and NiMH Charger using the LM2595 - [Link]
The MAX14777 quad SPST switch supports analog signals above and below the rails with a single 3.0V to 5.5V supply. The device features a selectable -15V/+35V or -15V/+15V analog signal range for all switches. Each switch has a separate control input to allow independent switching, making the device an alternative to opto-relays in applications that do not need galvanic isolation.
The IC features 10Ω (max) on-resistance, and 9mΩ (typ) RON flatness, along with a low 50nA (max at +85°C) on-leakage. For maximum signal integrity, the device keeps this performance over the entire common-mode voltage range. Each switch can carry up to 60mA (max) of continuous current in either direction.
MAX14777 – Quad Beyond-the-Rails -15V to +35V Analog Switch - [Link]
keolerea @ instructables.com writes:
This work includes, GTP USB (not plus or lite) .
The schematic, photos and PCB have been developed by PICMASTERS based on some valuable works done before.
This programmer supports pic10F, 12F, 16C, 16F, 18F,24Cxx Eeprom.
Unfortunately, it works with only Winpic800 v.355. We have succesfully tried it with some pics; PIC18F252, 18F2455, 18F2550, 18F2520, 16F84, 16F628 and 24C32 eeprom.
GTP USB Pic Programmer - [Link]
drj113 @ instructables.com
Yep – One of those! This Instructable extends my Arduino Ethernet controller to control a set of up to 6 relays, but that’s not the neat bit. The neat bit is that there is a web based state machine in the AtMega chip so that the relays will operate in whatever sequence with whatever timing you want – all by themselves. This allows you to have a set of relays connected to the end of a piece of Ethernet cable that can be accessed from a web browser anywhere from your house.
A Remotely Programable Relay Controller - [Link]
jimk3038 @ instructables.com writes:
This instructable fully describes building a PWM driver to control four LEDs from one small Microchip 12F609 board. The original design was called the “Kemper LED Lamp” and I sold a few lamps to several brave folks through my web site. However, I’ve come to discover selling small quantities to a few folks is a major pain in the backside. Hand soldering these together and then selling them at $4 bucks each is no way to make money.
Open Source Microchip LED / PWM Driver Project - [Link]
With an enhanced offer of X-chip series USB chips, it´s possible to immediately choose a type suitable for your application.
The family of X-Chip series USB chips we introduced to you in the article „New X-chip series will connect you to USB even easier and faster!“. Gradually these USB chips gain still more popularity thanks to a relatively very simple implementation into a target device. It can be said, that a concept of the X-Chip series is based on a direct conversion USB to a chosen serial interface. i.e. to an interface used in our device (UART, I2C, SPI…), we can choose a suitable chip supporting “our” serial interface. Naturally almost every version is available in various packages. For development and production in smaller quantities it is usually easier to work with packages like SSOP and similar, but for a bigger serial production it´s often more convenient to use a QFN package providing another space saving on a PCB. That´s why we enhance our stable stock offer with the FT230XQ-R chip in the QFN16 package.
For development support, you can find in our store also so called breakout modules providing the simplest way to begin working with X-chips. A novelty in our offer is the UMFT234XF module with the FT234XD chip. FT234XD is almost identical to FT230X, the difference is only in the package with a less pins count.
In case of interest in any FTDI component, please contact us at email@example.com.
X-chip series – USB while you wait – [Link]
mattthegamer463 @ instructables.com writes:
If you’ve ever been designing a circuit and had to experiment with different values of caps and resistors, you probably didn’t like it much. It can be a hassle to switch out components over and over, trying to find the right combination to suit your needs. With RC filter circuits, it can be quite difficult to determine what resistance and capacitance you need to get the filtering attributes you want. With a Selection box such as this just a turn of a knob can test many different values.
Build a Resistor/Capacitor Selection Box - [Link]
janw @ instructables.com writes:
I have something with the weather. I always like to know how warm or cold it is, how much rain has fallen, how hard the wind blows and from what direction,… and so there are lots of sensors around our house to keep me up to date. These sensors give only a limited range of data, so I still need the internet to inform me about everything I want to know.
LED wind indicator - [Link]
This little device shows you the CPU-load, how much physical and virtual memory is used. It shows this data per 10% on 3 ledbars. To do so it uses a VCP (Virtual COM Port), so that it can be connected to a PC via a USB connection to receive the data. Collecting the data and sending it to the device is done by a Python script.
USB CPU and Memory monitor - [Link]