Sean Watson, chairman of TT Electronics, has upped his stake in the sensor and electronic component technology firm, buying a total of 12,550 shares for £29,221.In two separate transactions, Watson bought 7,550 shares at 166.5p per share and a further 10,000 at the same price, 5,000 of which were attributed to a Mrs S Watson.The chairman now owns 158,000 shares, equal to 0.1% of the group.The share price has performed well over the last 12 months, surging over 75%.The group announced last month that pre-tax profits for 2010 climbed to £25.2m, compared with a loss of £16.6m in 2009. Revenue increased by 23.3% to £571.3m, from £463.5m."Strong customer demand has continued in 2011, particularly in our Components, Sensors and IMS divisions," said chief executive Geraint Anderson.---bcTop Director BuysAer Lingus Group (AERL) Director name: Mr Leslie BuckleyAmount purchased: 74,074 @ € 0.81 Value: € 60,000Primary Health Properties (PHP) Director name: Mr Harry Abraham HymanAmount purchased: 16,393 @ 305.00p Value: £49,999MCB Finance Group (MCRB) Director name: Mr Henry NilertAmount purchased: 100,000 @ 33.80p Value: £33,800TT Electronics (TTG) Director name: Mr Sean Michael WatsonAmount purchased: 10,000 @ 166.50p Value: £16,650EP Global Opportunities Trust (EPG) Director name: Mr David J HoughAmount purchased: 7,500 @ 177.62p Value: £13,322TT Electronics (TTG) Director name: Mr Sean Michael WatsonAmount purchased: 7,550 @ 166.50p Value: £12,571Mediwatch (MDW) Director name: Mr Philip G StimpsonAmount purchased: 500,000 @ 2.50p Value: £12,500Chrysalis VCT (CYS) Director name: Mr Peter HarknessAmount purchased: 25,000 @ 49.00p Value: £12,250EP Global Opportunities Trust (EPG) Director name: Mr David J HoughAmount purchased: 6,000 @ 177.62p Value: £10,657Top Director SellsMorrison (Wm) Supermarkets (MRW) Director name: Mr Mark GunterAmount sold: 188,560 @ 284.78p Value: £536,981Morrison (Wm) Supermarkets (MRW) Director name: Mr Richard PennycookAmount sold: 181,018 @ 284.78p Value: £515,503Premier Farnell (PFL) Director name: Mr Mark WhitelingAmount sold: 151,595 @ 275.85p Value: £418,175James Halstead (JHD) Director name: Mr Eberhard LotzAmount sold: 16,000 @ 455.00p Value: £72,800