Hopefully someone can help me with this circuit. Mine had two 10uf caps instead of the 10 and 22 and I replaced both. I couldn't find a 22nf locally so I didn't change it. I replaced the transistor with NTE199 - https://www.amazon.com/gp/product/B0002FRNQC?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00 and made sure all the pins matched up.
When powered it creates enough magnetic force to start the pendulum, but it doesn't seem to oscillate. It seems to keep pulling with a weak force so the pendulum swings back and forth less and less until it stops with magnets near the coil. Remove the power and it lets go to a neutral position again. Loosening the spring seems to make it last a little longer, but it still stops. I am not good enough with electronics to figure this out and I only have a multimeter not a scope. What should I be looking for and could the 220nF be my problem? Did I buy the wrong transistor? Would a 22uF work better than 10?
When powered it creates enough magnetic force to start the pendulum, but it doesn't seem to oscillate. It seems to keep pulling with a weak force so the pendulum swings back and forth less and less until it stops with magnets near the coil. Remove the power and it lets go to a neutral position again. Loosening the spring seems to make it last a little longer, but it still stops. I am not good enough with electronics to figure this out and I only have a multimeter not a scope. What should I be looking for and could the 220nF be my problem? Did I buy the wrong transistor? Would a 22uF work better than 10?
