Circuits & Schematics: Design - 6

51. G-Force Meter Project
    Circuits Automotive Measurement ATtiny26
    .. Maybe it is interesting to let the first 5 LEDs cover the first 0.5 g, the next 10 LEDs from 0.5 till 1 g. Ideas This design, or a similar design with more LEDS could be used as a Spoke POV. The accelerometer can detect the ...
    Oct 17, 2007

52. Infra Red Remote Control Extender
    Circuits Domestic TV CA3140
    .. 1/4 W resistor 1 27 ohm 1/2 W resistor 1 BC337 transistor 1 CA3140 MOSFET opamp Circuit Advantages The advantage of this design against similar designs is that there are no adjustments to make or set-up procedures. However care should be ...
    Oct 27, 2007

53. Switcher Adds Programmable-PWM-Duty-Cycle Clamp
    Circuits Supply
    .. the transformers could saturate, causing a catastrophic failure in the system. However, to drive down the cost of the design, many power-supply designers use inexpensive, eight-pin PWM controllers that have no duty-cycle clamp. This ...
    Oct 29, 2007
54. Car PSU
    Circuits Automotive Supply Power
    .. I only had 14 pin SOP versions so I used a DIP header and hacked it in. Three type of protection are incorporated in the design. First is a 6 amp Polyswitch fuse, it is self-resetting, and also protects against high temperatures. Next is ...
    Oct 31, 2007
55. Electronic Breadboard Templates
    Circuits Tools and Technologies
    .. markings and a fix to an Inkscape PDF export bug. The fix is required because I use a clipping object in the board design. The holes on the board are made up of clones of 5 x 5 sets of holes (themselves cloned from a single hole) ...
    Oct 30, 2007
56. Find Hex-Code Values for Microcontroller's ADC Voltages
    Circuits Microcontrollers Usage Theory
    .. 8-bit microcontroller programming with a simple formula to calculate hex values of ADC output. This Design Idea is for low-end, eight-pin, flash-memory, 8-bit microcontrollers, such as the MC68HC908QT4A from ...
    Nov 4, 2007
57. Circuits Monitor and Balance Large Lithium-Ion Batteries
    Circuits Supply
    .. self-discharge rates eventually lead to unequal levels of charge. Therefore, you must correct the cell balance. This Design Idea provides one strategy for protecting and balancing large, high-voltage batteries. The circuit in Figure ...
    Nov 14, 2007
58. Versatile Digital Speedometer Uses Few Components
    Circuits Measurement Domestic
    .. mechanical and moving-magnet designs that use analog moving-pointer displays, the electronic speedometer in this Design Idea features a digital readout and a power-saving device that uses few components. Figure 1 shows the ...
    Nov 14, 2007
59. Make your own Solar Bag
    Circuits Domestic Solar
    .. this part of the project: A bag. Either you transform one of your bags or you look for a new one that looks cool and has a design that makes it easy to integrate a solar panel. The later was the way we choose. A solar panel. Our ...
    Nov 16, 2007
60. Simple Digital Filter Cleans Up Noisy Data
    Circuits Measurement
    .. time constant of minutes would require very large values for R and C. Figure 1 shows an analog RC lowpass filter and its design equations. As an alternative, you can clean up noisy signals that remain within the ADC's linear range by ...
    Nov 28, 2007

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