The PICList – Microchip PIC Interest Group

The PICList is a collection of people interested in the Microchip PIC and other similar processors who have requested that email sent to the PICList email address be forwarded to them. From the mass mind of these people the following have grown:

The PICList -Schematics and Code

James Newton of Massmind.org  helps hosting the piclist site and editing and organization of the PIC FAQ.  The PICList mailing list is hosted by MIT.

The PICList - Microchip PIC Interest Group

PIC 18F4550 USB 16F877A IO RS232 Eval Board

The design is essentially a double evaluation board for the chips 18F4550 and 16F877A. It contains also a MAX232A serial module having two transmitters and two receivers with the ability to connect either to 4550 or 877 microcontroller. Each microcontroller port ends up to a pin header in order to give interconnection capabilities to the board for future experiments.

Quadcopter of Harald Sattler

The top of the sNQ Shorty looks much tidier than its big brother, here the experience gained with the first work increases. The cables between the control unit and the LEDs and the motors are now laid on the underside of the circuit board and lead through the holes to the pads provided for this purpose.

sNQ Shorty – Quadcopter of Harald Sattler

“After initial flight tests I can confirm the function of the Mega328 with 16 MHz at 3.3 V operating voltage. Of course, one must be aware that the chip is operated outside its specification and no one can guarantee that the two chips and the ?C function are compatible with all possible conditions. It may well be that the shorty in the living room at 20 ° prima flies, then one opens the door and there comes cold air into the room, the copter simply crashes.”

Quadcopter of Harald Sattler

“With the sNQ Stretcho, we pushed the motors down as far as possible through the brackets, because this would dampen or even suppress vibrations due to the engine running, and disturbances of the IMU chip largely fall away. In the case of the sNQ Shorty, this can only be implemented to a limited extent, …”

Mikes Optical Timer Counter

“This page is the result of a lot of effort over the past couple years to develop a quality, inexpensive device to test shutters on the classic film cameras that I have been using…” .. Mike

Mikes Optical Timer Counter

Once built, this counter timer/device is easily adapted to a wide variety of applications, simply by construction of a new sensor. Although designed to be used with photo-transistors, this device can also use relays, transistors and many other kinds of electrical switches as a sensor.

Mikes Optical Timer Counter

Other Projects

Model Railroading, 3 Transistor Audio Preamp for a Dynamic Microphone

Configuration and control of this counter/timer is through a RS232 port. Cable configuration for a usual PC compatible would consist of a null modem cable, with a female connector on the timer/counter end of the cable. The correct cable for a PC or usb to serial adapter with a DB-9 interface is listed in the bill of materials.

delabs Page Digital Timers Counters and Clocks