Bench

back Seat - 46" wide, 24" deep. Front 19" off ground, rear 17" off ground. Back ends - 36" high - back is 17" high, 3" from back at top, 7" at bottom.

classic mac crt from rapsberry pi 4

Made some progress driving the Mac CRT from the Raspberry Pi 4 with MiniVMac running MacSE emulation. The color "mixing" down to B/W works pretty well. The most curious thing I'm seeing is that one pixel squiggle back and forth on vertical lines each scan line. Its kind of crazy to run the emulator in fast mode. Its like the fastest classic mac you've ever seem https://www.facebook.com/groups/644418325623804/?multi_permalinks=6285890194809894&hoisted_section_header_type=recently_seen

D10 Bluetooth-compatible 5.0 Subwoofer Digital Power Amplifier Board mod

Title as per the ebay ads ;-)

Useful mains/DC powered board - bluetooth, mp3 from USB, line in and 2x mic in with echo ;-) The amp chip is unlaballed, but seems to be some kimnd of class D amp. The internal mains PSU provides around 19v; the DC input suggests 12-24v. (worth noting that the small version of this board, labelled 'Hifi Bass Bluetooth Amplifier Board Mini 12V 240V Stereo Subwoofer With BT' AMP-5M-C, uses half of a standard car radio stereo amp chip and only manages about 7W; this seems to have a bit more poke) The Bluetooth is the main problem though - a loud audible message on power up saying 'bluetooth mode' unless the volume is right down, and of course if connected to a phone as a portable speaker, then if in use as an instrument amp and you get a messag on your phone... I wanted to still use the board as an mp3 player, built into a speaker, but also as a small bass amp. My small rubber string bass has a preamp anyway, so just needs to go straight into to amp module. The unit has two boards - power supply & amp, and the music generation board. I was able to identify the cable carrying analogue audio between the two - the centre connection of the five pin connector on the music board (CN2 by the USB socket). Although only four pins are used, it's a useful way of identifying the cable.

I cut this wire, and extended both halves.

I isolated the first mic input socket (leaving the second one connected) and used it as a break/insert jack; leaving the board connected when unplugged, but when connected disconnects the music board output and replaces it with whatever's on the jack lead.

I disconnected the resistor that mixes the two socket outputs together, and then cut the PCB copper to isolate the normally closed contact on the socket (switches to earth when no mic connected). The music board output was connected to that, and the feed to the amp board connected to the tip connection. I then reassembled the unit and tested it. Before fitting the two mic sockest though, I put read tape over the hole for the new input jack and cut the hole through, to make it clear it is the new 'break' jack.

 https://www.hse.gov.uk/pubns/mines06.pdf

http://www.ingr.co.uk/sar_construction.html

Walks

fisheries loop, there are some footpaths across mynydd cerrig hill too

 

i like this route onto mynydd but follow the track as the footpath is very boggy

 

follow the track then take the first right footpath, the first right track leads to a house as does the track if you follow it all the way. Follow the middle footpath keep going up till u find the trig point

 

  
 

8 pin mini DIN

 https://www.retrorgb.com/retro-gaming-cables-now-offering-8pin-minidin-scart-cables.html

https://etim.net.au/nesrgb/rgb_connector.htm

https://wiki.nottinghack.org.uk/wiki/Raspberry_Pi_Small_LCD

http://www.neo-geo.com/forums/showthread.php?244946-Question-Regarding-the-NeoGeo-Aes-AV-pinout-to-Framemeister

https://www.amazon.ca/Component-Video-Audio-Output-Adapter/dp/B071NLCZDB

https://www.slideshare.net/degarden/electronics-computing-all-connectors

http://www.eightbitclone.com/just.html

PB G3/3400 power plug

from http://pinoutsguide.com/Power/apple_tibookpower_pinout.shtml

Also Suitable for iBook G3 iBook G4 PowerBook G4 NB:PowerBook G3 and iBook Clamshell Require 3.5mm Jack

Basic version of Apple power connector
Works without the internal LEDs or the outer sleeve. The basis of the connector is a 2.5mm (yes 2.5mm, not 3.5mm) male jack. Functioning 100%, including charging the battery.
 

power adapter cable Pin	Name	Direction	Description
1 (left)	sense		400KOhm to GND
2 (right)	GND		Ground
3 (ground)	Vin	<-- td="">	+24V power

Only numbers are taking in account at drawing.
Correction for Powerbook G3 and Clamshell Notebook (3.5 mm jack): Tip (1 = front-most connector) is _NOT_ connected. Ring (2 = middle connector) is the common lead (minus polarity). The sleeve (3) is connected to +24V, this is the inner (hot) wire (with white insulation) of the original G3 (yo-yo type) power adaptor.
Also there is a supply for the loading indicator LED _within_ the plug. A resistor from +24V to the outer 9.5mm tube around the power plug.