Ten newest model NightReaders to go to Bangui next week

Monday next, my son Willem travels to Bangui in the Central African Republic for aircraft maintenance. Now I work on ten NightReaders of the using-next-to-empty-batteries type, that he could take with him. The first prototype that Willem took there three weeks ago was received with enthusiasm by the local people that he contacted through the Medcin Sans Frontieres. With this new series of ten, I work on a wider base for local experimentation, as up to now I had no practical experience of how the gadget would function. Expecting similar positive response, I prepare to visit Bangui mid December for 4 weeks stay. Other project should be presented there as well, such as the rope pump, the Demo Sticks and the pulley. I should present pictures here of these items, but my PC has broken down, so I can not access the image folder. The design for the NightReader gets a better base. Paula worked on the method for making the battery bags. Jos Knoop checked the electrical circuit for limiting tension for the two LED's used in the NightReader. He supports the circuit as advised to me by Frans Spiering. It has to be checked if an extra condensor should be added parallel to the resistor that governs the tension produced by the transistor.
I found it difficult to decide on the wiring between the electrical components, but the outcome is satisfying for the time being. The outcome is: components and insolated bits of wiring on the outward side of the mounting board, all soldering of components an wires on the other side. This safeguards components from being damaged by a hot soldering device. In practice, the wiring results in a protective cover over the electrical components. It proved easy to solder with primitive means. It was well possible to visually check these connections. The mounting board is actually the little wooden handle, with the middle section reduced to 3 mm.. It proved easy to make little holes to pass the electric wiring. I used a sharpened bicycle spoke, bent in a special way (soon an image will be made available).
Again Willem will stay in Bangui for only one week. News on how the NightReaders will perform will soon be known.