“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.
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
OpenServo is an open community-based project started by Mike Thompson. Low-cost digital servo for robotics being the goal. New code and hardware.
OpenServo – Digital servo for Robotics
Independent H-Bridge allowing for braking, Temperature sensor, 400khz I2C/TWI interface. – New Features
- High precision positioning
- Advanced curve based motion profile engine
- Open source design and software
- Back EMF speed sensing
- High speed 20MHZ design
Bakatronics LLC designs and manufactures innovative electronic circuits for model railroads. For the last decade Baka has been creating new ways to make your model railroads “come alive”.
Bakatronics – DIY Kits and Model Railroads
The Kits include the Lighthouse Flasher, Emergency Lights, Airport Beacon, Campfire and Super Welder Flash kits All are based on advance micro controller technology and will enhance any railroad.
FK945 Digital Temperature Controller kit
This circuit can be used to control when an appliance or device turns on and off by temperature. 3 Digit Read Out and easy to set buttons.