| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 9B10.00 | Timers | | |
| 9B10.10 | spark timer | AJP 37(5),563 | A transistorized spark timer. |
| 9B10.10 | transistorized spark timer | AJP 36(1),60 | Circuit diagram for a transistorized spark timer. |
| 9B10.10 | spark timer circuit | AJP 48(4),321 | A complete spark timer circuit. |
| 9B10.10 | solid state spark timer | AJP 40(3),487 | Another circuit. |
| 9B10.10 | spark timer | AJP 37(3),326 | A solid state spark timer with five frequencies between 5 and 60 Hz. |
| 9B10.10 | spark timer | AJP 36(7),642 | Circuit diagram for a simple low cost solid state synchronous spark timer. |
| 9B10.10 | wide range spark timer | AJP 41(5),743 | Six ranges from 5 to 120 Hz. |
| 9B10.10 | double sparker for air track | AJP 36(8),761 | Replace the jumper wire on each cart with a parallel RC combination. |
| 9B10.10 | spark timer for air track | AJP 40(10),1549 | A spark timer for the Eduquip air track. |
| 9B10.11 | spark timer modification | AJP 48(11),989 | Cenco spark timer modification. |
| 9B10.12 | spark timer | AJP 29(6),367 | Circuit for a tube based ac spark generator. |
| 9B10.12 | electronic spark timer | AJP 34(6),536 | A tube based variable frequency spark timer. |
| 9B10.13 | spark timer | AJP 35(6),ix | A dc relay combined with a R-C circuit to form a relaxation oscillator. |
| 9B10.14 | double spark timer - air track | AJP 40(12),1864 | Plans for a double spark timer for the air track. |
| 9B10.14 | coincident spark timer | AJP 39(5),566 | A
coincident spark timer starts sparking at the manual release of the glider.
Improves the first mark timing for impulse experiments. |
| 9B10.14 | double sparker for air track | AJP 37(10),1065 | Another double sparker method. |
| 9B10.14 | double sparker note | AJP 37(4),455 | Re: AJP 36,761 (1968), recommends a different capacitor. |
| 9B10.14 | two-glider spark records | AJP 36(4),ix | Leave the air track floating and attach the spark timer across the two wires. |
| 9B10.15 | continuous spark timer record | AJP 41(6),831 | The spark timer paper strip is replaced by a rotating cylinder. |
| 9B10.20 | electric stop clock control | AJP 29(8),498 | Apparatus Drawings Project No. 20: A system for controlling a timer with photoconductive cells and/or electric contacts. |
| 9B10.20 | electric timer control | AJP 43(12),1076 | A circuit for cycle counting and clock control. |
| 9B10.21 | versatile digital timer | AJP 51(2),183 | An inexpensive hardwired timer based on the 7217A timer chip. |
| 9B10.22 | sequential timer | AJP 46(8),864 | A timer to sequentially switch many channels into a single channel strip chart recorder. |
| 9B10.23 | household clock conversion | AJP 28(5),507 | Add a rectifier in parallel with the switch to stop the residual motion of the clock motor. |
| 9B10.24 | time switch for corridor display | AJP 31(2),132 | Circuit for a switch with a reset timer that will open after times from a few seconds to ten minutes. |
| 9B10.28 | lecture room counter | AJP 43(11),1017 | Complete plans and circuit boards for a high speed counter with 22 cm high display. |
| 9B10.30 | scaler as timer | AJP 34(8),iv | Gate a 100 KHz oscillator to a scaler. |
| 9B10.30 | scaler becomes photocell timer | AJP 33(2),xiii | Circuit diagram for interfacing scalers to photocell timers. |
| 9B10.30 | free fall timer | AJP 28(9),817 | Gate a multivibrator to a scaler. |
| 9B10.30 | interval timing with a scaler | AJP 33(6),v | Gate a tuning fork oscillator to a scaler. |
| 9B10.31 | photodiode gate | AJP 40(8),1168 | A photodiode gate for the Beckman-Berkeley electronic timer. |
| 9B10.32 | light operated millisec timer | AJP 44(8),803 | Light activated gating of a 555 timer running at 100 kHz. |
| 9B10.40 | big X4 timer | AJP 49(7),701 | Abstract from the 1981 apparatus competition of a 1 ms timer with 2.8 in high digits. |
| 9B10.45 | phototransistor adaptor | AJP 45(9),881 | A photo transistor adaptor to control stopclocks, digital stopwatches, and digital timers. |
| 9B10.50 | pendulum counter/timer | AJP 43(3),280 | Circuit for a timer using a photocell that keeps track of the total time and the number of cycles. |
| 9B10.60 | pulse counter | AJP 45(11),1126 | Modify a four function pocket calculator to function as a pulse counter. |