Cheap Idea for a DRO

[ecat]

YaY

Progress of sorts.... Or maybe just chance!

43 48 3A 49 58 0C 30 0C 44 41 43 49 4D 41 4C 0C CH:IX.0.DACIMAL.
49 4E 43 48 3A 49 58 2C 30 2C 44 65 63 69 6D 61 INCH:IX,0,Decima
6C 2C 49 6E 63 68 3A 00 18 3A 03 18 3A 02 18 3A l,Inch:

May not look like much bit it makes me happy...

Had a dodgy scope and a very old Thurlby storage adaptor on it, it looked very much like the transistor was slow in turning off. The above is the first time I've seen anything approaching English, trick was to half the value of the 3k3 collector resistor.

Unfortunately the above was looking like a 1 off :(

Undeterred I added a 2nd and 3rd parallel 3k3 ending up with 825r collector resistance. heh. It's alive :)

49 58 0C 30 0C 44 45 43 49 4D 41 4C 0C 49 4E 43 IX.0.DECIMAL.INC
48 3A H:

My Prolific dongle is only giving about -4v on DTR, problem?