A discrete logic, black and white video board, based on designs from David L Heiserman - TTL-1-bit-Video-Board/full video boardREV2.csv at main · nateo87/TTL-1-bit-Video-Board ...

A unidirectional and unipolar stepper motor driver has been designed, for the purpose of effectively solving many existed pressing problems in the stepper motor such as high costs, poor universality, ...

The nice thing with IDE is that these days everybody swears by gigabytes-wide SCSI drives, so it is really easy to find very cheap "small" IDE drives. I bought a 540 Megs drive for $18, to give you an ...

The board has 5 jumpers that are associated with the change of functions from Magic Desk to Ocean (and others). Ocean cartridges are differently mapped in memory, depending on their size. 128k and ...

Homebrew 8-bit computers tend to have fairly limited displays, often one or more seven-segment displays and an array of LEDs to show the values of RAM or perhaps some other states of the computer. … ...

The Two-door Buzzer with Display is applicable and well suited to be used in a house having two gates or doors that are distant from each other. It helps the person inside the house by providing an ...

The logic-low signal forces the 74LS02 NOR gate’s output high, which provides enough power to operate to the 555 timer circuit. The timer triggers on power-up. Capacitor C 2 holds the trigger signal ...

Here is a blow-up of the modification: The resistor was initially in position R5, just below the 74LS02. I desoldered it and transplanted it to position PTH1. This connects pin19 of the custom control ...