26-12-2014, 02:26 PM
Apologies in advance for the non-radio content...
Small present I made for SWMBO using reclaimed items - a neon letter from the front of a theatre (about 6" tall), some offcuts of an oak floor we had laid 9 years ago, bits and pieces from the workshop... some specialised neon bits - the silicone covers for the electrodes and the special latex "blocking paint" to conceal the electrodes themselves, all bolts are hex-headed to prevent curious children opening it (2000V inside) - cable clamp was stolen from an old light fitting. Oak was thicknessed down from 20mm to to 14mm and the joints cut, backing timber was 4mm thick so 4.8mm x 5mm deep groove set round inside of box (176mm x 210mm internal), Forstner bits used to cut 20mm holes for tube electrodes, lots of use of router table, table saw, planer-thicknesser etc.
Mounting/back panel for the neon was very rare timber, Ziricote, sourced from Timberline in Tonbridge - lovely bit of wood - they sell 100s of different rare (legal) woods for turning, musical instrument manufacture & repair etc. Amazing place. Absolutely amazing...
Finished on Xmas Eve... still to do: small uP to PWM-modulate the HV to dim the tube a bit - bearing in mind it was originally an outdoor display sign designed to be read from 50ft away, its a tad bright for the kitchen, so I wil change the standard electronic transformer I'm currently (!) using for a PWM version when it arrives from the USA - a small uP, or even just a PWM 555-based design, will control brightness nicely.
Luckily, SWMBO likes neon and absolutely loved the sign...
Small present I made for SWMBO using reclaimed items - a neon letter from the front of a theatre (about 6" tall), some offcuts of an oak floor we had laid 9 years ago, bits and pieces from the workshop... some specialised neon bits - the silicone covers for the electrodes and the special latex "blocking paint" to conceal the electrodes themselves, all bolts are hex-headed to prevent curious children opening it (2000V inside) - cable clamp was stolen from an old light fitting. Oak was thicknessed down from 20mm to to 14mm and the joints cut, backing timber was 4mm thick so 4.8mm x 5mm deep groove set round inside of box (176mm x 210mm internal), Forstner bits used to cut 20mm holes for tube electrodes, lots of use of router table, table saw, planer-thicknesser etc.
Mounting/back panel for the neon was very rare timber, Ziricote, sourced from Timberline in Tonbridge - lovely bit of wood - they sell 100s of different rare (legal) woods for turning, musical instrument manufacture & repair etc. Amazing place. Absolutely amazing...
Finished on Xmas Eve... still to do: small uP to PWM-modulate the HV to dim the tube a bit - bearing in mind it was originally an outdoor display sign designed to be read from 50ft away, its a tad bright for the kitchen, so I wil change the standard electronic transformer I'm currently (!) using for a PWM version when it arrives from the USA - a small uP, or even just a PWM 555-based design, will control brightness nicely.
Luckily, SWMBO likes neon and absolutely loved the sign...
sıʌǝɹq ɐʇıʌ `ɐƃuol sɹɐ
ʞɔıu
ʞɔıu









