Skip to main content

A few design changes.

VOLUME CONTROL

Someone who is interested asked about volume control as some 8-bits are sensitive to volume of playback. I had thought about this originally, as I know from experience that the MSX can be tricky, but did nothing more other than to adjust the potentiometer on the amp before I placed the ArduiTape into its housing. However if you are using this on different computers this could be annoying so I've decided to modify the amp.


If you want to do this you will need to get a 10k Ohm variable resistor/amp. Logarithmic is the best type for volume control but linear is cheaper. Also try to get a 3 pin mono as they fit best.


This is the type I got for testing purposes.












Desolder and remove the existing potentiometer, very carefully and add 3 single pins into the holes left behind.











Once that is done take 3 dupont wires and remove the connectors off one end and solder the wires to the pins on the new potentiometer. Connect the wire from the middle pin to the middle pin on the amp board and connect the outside pins on the potentiometer to the outside pins on the amp.

This is what mine looked like after I'd done it. obviously the potentiometer is too big but I wanted to test the theory first.










Redesign Of The Button Board



For the Button Board I have redesigned it so that the buttons are on the under side as that way they will fit more snug in to the housing and will protrude more for easier use.






 Bottom View Of the Button Board.





Top View Of The Button Board






Pin connections labelled.





Comments

Popular posts from this blog

New Firmwares With New Features

Thanks to the help of Rafael Molina Chasserot some new features have been added to the TZXDuino and CASDuino firmwares which has freed up some memory as well, which may lead to more features being added in the future.
A percentage counter and a timer counter have been added to all screens so that you know how much is left of a file to play and how long it has taken to load.
The OLED1306 and PCD8544 use completely new routines for the firmwares saving a lot of memory.
Folder navigation is now different. Rather than using the Menu button on TZXDuino or the Stop button on CASDuino to return to the ROOT directory, if you press the stop button when no file is playing you will go up one folder only making it easier to navigate.

TZXDuino
The TZXDuino has had a menu added so that MSX users can set the Baud rate of TSX files so that they can load faster than normal.
A few more emulator only IDs have been fixed so that they are skipped by TZXDuino.

CASDuino
CASduino has had a Baud Rate of 3675 added to…

TZXDuino 1.7

TZXDuino 1.7
This fixes issues with pause lengths that we never noticed before. It should fix games like Top Gun and Street Hawk for the Spectrum and make CDT files behave as they should for the Amstrad CPC.Changes.
*Maximum pause length of 8.3 seconds due to the TimerOne library has been worked around.
*ID20 Pause Block fixed.
*Temporary fix for pause after motor control removed.https://mega.nz/#!aEt1VJKZ!ZFw-fP3bkNTtiPlbG_IllmR94Xni3KvIGUn6Jggfof8

UEF Playback added to TZXDuino

Thanks to the work of Kernel Crash we have added uncompressed UEF playback to TZXDuino. This means that Acorn machines can be added to the list of computers that can use TZXDuino. There is standard mode and a Turbo mode that can be switched on in the menu. The turbo mode loads at 1500 baud and does improve the loading time on an Acorn Electron. There is also a 1550 and 1600 option in the TZXDuino.h file but not all Electrons can handle the faster speed.

You can read Kernel Crash's blog here.

You can download the TZXDuino 1.11 from here.