TRS-80 Computer Whiz Kids - appeared in 1984. Eight issues in all are known to have been published, the last appearing in 1991.
Many people give up on Wireless Keyboard Mouse Combo after a few months of "Novelty". This is due to the chore of replacing batteries and also the cost and wastage (carbon foot).
Then i have long been suggesting since nineties, ferrite smps coupled charger docks. This is like RFID, but more like RF power transfer. One half of Ferrite E-Core is in the Gadget and the other half is in the Dock. When the Gadget is docked it is sensed and power transfer just like in SMPS. Rechargeable batteries in the gadget.
Here is the Schoodle for building this. The Mumbo Jumbo to make a Wired-Wireless Combo
How-To Convert Wireless to Pseudo-Wired
Now you got a Wireless Combo, it can be converted into wired yet wireless, it is simple the wires will now carry 3V power to the Keyboard and Mouse, so no batteries. A little gentle and smart drilling is needed for the Mouse.
Get a 5V Adapter, the ones used for charging phones and music players. If you cannot get 5V use a 7805 to derive a 5V from 6 or 9. Use two 1N4007 in series on the positive line to drop 1.5V - test out with a dummy load of 10K and 100uF cap. Now use this to power both the mouse and keyboard with thin dual-core wires leading to the battery terminals. Soldering this may be a delicate job. Now you got a Perpetual Wired Keyboard Mouse Combo. The Interface still remains Wireless.
Another way is use Rechargeable Batteries for both. The wires will carry exactly a regulated 3.3V from a LM317 circuit which can be tweaked. The Mains adapter can be any 6V or 9V raw DC. You can have a Connector for the power wires when you want it to be wire free. This may require greater Gadget Opening and Drilling Expertise.
Reuse - Be Earth Friendly - Keep your Carbon Footprint smaller than that of a Yeti.
Then i have long been suggesting since nineties, ferrite smps coupled charger docks. This is like RFID, but more like RF power transfer. One half of Ferrite E-Core is in the Gadget and the other half is in the Dock. When the Gadget is docked it is sensed and power transfer just like in SMPS. Rechargeable batteries in the gadget.
Here is the Schoodle for building this. The Mumbo Jumbo to make a Wired-Wireless Combo
How-To Convert Wireless to Pseudo-Wired
Now you got a Wireless Combo, it can be converted into wired yet wireless, it is simple the wires will now carry 3V power to the Keyboard and Mouse, so no batteries. A little gentle and smart drilling is needed for the Mouse.
Get a 5V Adapter, the ones used for charging phones and music players. If you cannot get 5V use a 7805 to derive a 5V from 6 or 9. Use two 1N4007 in series on the positive line to drop 1.5V - test out with a dummy load of 10K and 100uF cap. Now use this to power both the mouse and keyboard with thin dual-core wires leading to the battery terminals. Soldering this may be a delicate job. Now you got a Perpetual Wired Keyboard Mouse Combo. The Interface still remains Wireless.
Another way is use Rechargeable Batteries for both. The wires will carry exactly a regulated 3.3V from a LM317 circuit which can be tweaked. The Mains adapter can be any 6V or 9V raw DC. You can have a Connector for the power wires when you want it to be wire free. This may require greater Gadget Opening and Drilling Expertise.
Reuse - Be Earth Friendly - Keep your Carbon Footprint smaller than that of a Yeti.
"These pages are a useful collection of microcontroller RS-232 data acquisition circuits and code. Most of the code on these pages is written in C because it is the language that is definitely the fastest way to produce working applications."
The Micro Stop - RS232 microcontroller
RS232 controlled and RS232 powered DVM-001 voltmeter kit with PC voltage display. This circuit uses a PIC12F675 8-pin microcontroller with built-in analog to digital converter. The circuit also has an op amp and resistor divider network to achieve the 54vdc max input voltage.
RS232 serial tools
This rs232 data monitor is a thoroughly field tested and reliable software tool for serial monitoring, troubleshooting and logging rs232 communication. A laptop PC and this com port monitor give you a powerful, portable and sturdy tool to aid in designing and logging rs232 data between peripherals and hosts.
The Micro Stop - RS232 microcontroller
RS232 controlled and RS232 powered DVM-001 voltmeter kit with PC voltage display. This circuit uses a PIC12F675 8-pin microcontroller with built-in analog to digital converter. The circuit also has an op amp and resistor divider network to achieve the 54vdc max input voltage.
RS232 serial tools
This rs232 data monitor is a thoroughly field tested and reliable software tool for serial monitoring, troubleshooting and logging rs232 communication. A laptop PC and this com port monitor give you a powerful, portable and sturdy tool to aid in designing and logging rs232 data between peripherals and hosts.
Look no CPU! - Built with MyCPU which is made of discrete logic gates as the Bricks. Homebrew Computer for Education and Experimenting. Dennis Kuschel is the developer of MyCPU.
Homebrew Computer - MyCPU
The MyCPU is a "Central Processing Unit" that is completely built with discrete logic gates. Over the years the project has grown, and now the MyCPU is the brain of a real Personal Computer. The computer has the following capabilities and features
This can also be roasted on a single FPGA Board.
The “MyCPU v2.3” is ideal for education, and is a nice project for enthusiastic hobbyists. The system uses COM1 for terminal communication and COM2 for file service. The personal computer acts as file server. There are several applications you can use on the MyCPU.
Contiki on MyCPU
Contiki provides a window operating system for MyCPU. Several programs can run in parallel, and every program has its own window. Contiki does not replace the MyCPU Operating System, in fact it is a powerful application program that provides some really nice widgets for MyCPU.
Contiki can be controlled by a computer mouse. The red dot in the picture is the mouse cursor. The mouse hovers over the yellow highlighted link, the link target is shown in the status line at the bottom.
Homebrew Computer - MyCPU
The MyCPU is a "Central Processing Unit" that is completely built with discrete logic gates. Over the years the project has grown, and now the MyCPU is the brain of a real Personal Computer. The computer has the following capabilities and features
This can also be roasted on a single FPGA Board.
The “MyCPU v2.3” is ideal for education, and is a nice project for enthusiastic hobbyists. The system uses COM1 for terminal communication and COM2 for file service. The personal computer acts as file server. There are several applications you can use on the MyCPU.
Contiki on MyCPU
Contiki provides a window operating system for MyCPU. Several programs can run in parallel, and every program has its own window. Contiki does not replace the MyCPU Operating System, in fact it is a powerful application program that provides some really nice widgets for MyCPU.
Contiki can be controlled by a computer mouse. The red dot in the picture is the mouse cursor. The mouse hovers over the yellow highlighted link, the link target is shown in the status line at the bottom.
This site uses hands-on experiments to show the basics of how real things in the real world are controlled with computers.
Controlling The Real World With Computers
This site is also for anyone who is the least bit curious about monitoring and controlling such things as motors, lights and switches, or recording and playing everything from sound to the arm position on a robot.
Experiment 7 - Bi-directional Control Of Motors And The H-Bridge
It would be useful to be able to run a motor in either direction. That's simple with a motor of the type that's been used in the experiments thus far. Reverse the DC power connections on such a motor and its shaft will rotate in the opposite direction. One way to control direction is to use switches arranged in the following manner:
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