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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 

OpenServo – Digital servo for Robotics

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

OpenServo - Digital servo for Robotics

Independent H-Bridge allowing for braking, Temperature sensor, 400khz I2C/TWI interface. – New Features

Some features:

  • High precision positioning
  • Advanced curve based motion profile engine
  • Open source design and software
  • Back EMF speed sensing
  • High speed 20MHZ design